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You searched for: Subject cations Remove constraint Subject: cations Subject X-ray photoelectron spectroscopy Remove constraint Subject: X-ray photoelectron spectroscopy
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1. 2D–3D Mixed Organic–Inorganic Perovskite Layers for Solar Cells with Enhanced Efficiency and Stability Induced by n-Propylammonium Iodide Additives

Author:
Disheng Yao; Chunmei Zhang; Shengli Zhang; Yang Yang; Aijun Du; Eric Waclawik; Xiaochen Yu; Gregory J. Wilson; Hongxia Wang
Source:
ACS applied materials & interfaces 2019 v.11 no.33 pp. 29753-29764
ISSN:
1944-8252
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; additives; air; cations; contact angle; density functional theory; encapsulation; energy; hydrophobicity; hysteresis; industrial applications; oxygen; relative humidity; solar cells; solar energy; surface water; wettability
Abstract:
... Device instability has become an obstacle for the industrial application of organic–inorganic metal halide perovskite solar cells that has already demonstrated over 23% laboratory power conversion efficiency (PCE). It has been discovered that the sliding of A-site cations in the perovskite compound through and out of the three-dimensional [PbI₆]⁴– crystal frame is one of the main reasons that are ...
DOI:
10.1021/acsami.9b06305

2. AMn2O4 (A=Cu, Ni and Zn) sorbents coupling high adsorption and regeneration performance for elemental mercury removal from syngas

Author:
Zhen Wang; Jing Liu; Yingju Yang; Yingni Yu; Xuchen Yan; Zhen Zhang
Source:
Journal of hazardous materials 2020 v.388 pp. 121738
ISSN:
0304-3894
Subject:
X-ray photoelectron spectroscopy; adsorption; carbon monoxide; cations; chlorine; copper; desorption; hydrochloric acid; hydrogen; hydrogen sulfide; mercury; nickel; sorbents; sulfur; synthesis gas; temperature; zinc
Abstract:
... AMn₂O₄ (A= Cu, Ni and Zn) spinel sorbents synthesized by a low-temperature sol-gel auto-combustion method were for the first time used to eliminate elemental mercury (Hg⁰) from syngas. CuMn₂O₄ sorbent exhibits the highest Hg⁰ adsorption performance under simulated syngas, higher than 95 % Hg⁰ capture efficiency is obtained at 200 °C. Adsorption-regeneration experiments demonstrate that the regener ...
DOI:
10.1016/j.jhazmat.2019.121738

3. Adsorption and intercalation of organic pollutants and heavy metal ions into MgAl-LDHs nanosheets with high capacity

Author:
Jian Li; Hongzhi Cui; Xiaojie Song; Guosong Zhang; Xinzhen Wang; Qiang Song; Na Wei; Jian Tian
Source:
RSC advances 2016 v.6 no.95 pp. 92402-92410
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; anions; cations; chromium; energy-dispersive X-ray analysis; heavy metals; ion exchange; metal ions; methyl orange; nanosheets; nickel; pollutants; scanning electron microscopy; sorption isotherms; surface area; transmission electron microscopy; water purification
Abstract:
... Hexagonal MgAl layered double hydroxide (MgAl-LDH) materials comprised of nanosheets and microsheets with different precipitants were synthesized via a facile hydrothermal route. XRD, FESEM, TEM and BET were employed to characterize the samples. Structural characterization revealed that MgAl-LDHs nanosheets and microsheets are 100 nm and 2 μm in width, respectively. Furthermore, MgAl-LDHs nanoshee ...
DOI:
10.1039/c6ra18783h

4. Adsorption of Cd²⁺ by an ion-imprinted thiol-functionalized polymer in competition with heavy metal ions and organic acids

Author:
Qiaoping Kong; Binbin Xie; Sergei Preis; Yun Hu; Haizhen Wu; Chaohai Wei
Source:
RSC advances 2018 v.8 no.16 pp. 8950-8960
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorbents; adsorption; aqueous solutions; cadmium; cations; copper; energy-dispersive X-ray analysis; heat; heavy metals; metal ions; nickel; organic acids and salts; pollutants; polymers; scanning electron microscopy; ultrasonics; wastewater; zinc
Abstract:
... The simultaneous presence of heavy metals and organic acids in nature and wastewaters and their competition for adsorption sites determine the migration, transformation and fate of pollutants in the environment. A Cd²⁺-ion-imprinted polymer (Cd²⁺-IIP) with a thiol-functional group was hydrothermally synthesized by a surface imprinting technique combined with ultrasonic heating for selective adsorp ...
DOI:
10.1039/c7ra11811b

5. Adsorption of Formic Acid on the Fe3O4(001) Surface

Author:
Gamba Oscar; Noei Heshmat; Pavelec Jiří; Bliem Roland; Schmid Michael; Diebold Ulrike; Stierle Andreas; Parkinson Gareth S.
Source:
The Journal of Physical Chemistry C 2015 v.119 no.35 pp. 20459-20465
ISSN:
1932-7455
Subject:
X-ray photoelectron spectroscopy; active sites; adsorption; ambient temperature; cations; crystals; dissociation; formates; formic acid; iron oxides; moieties; scanning tunneling microscopy
Abstract:
... The adsorption of formic acid (HCOOH) on the Fe₃O₄(001) surface was studied using X-ray photoelectron spectroscopy, infrared reflection absorption spectroscopy (IRRAS), low-energy electron diffraction, and scanning tunneling microscopy (STM). At room temperature, HCOOH dissociates to form formate (HCOO–) and hydroxyl groups, facilitated by the close proximity of undercoordinated Fe³⁺/O²– cation/an ...
DOI:
10.1021/acs.jpcc.5b05560

6. Adsorption of ionic liquids onto silver studied by XPS

Author:
David A. Beattie; Andrea Arcifa; Iliana Delcheva; Brock A. Le Cerf; Stephanie V. MacWilliams; Antonella Rossi; Marta Krasowska
Source:
Colloids and surfaces 2018 v.544 pp. 78-85
ISSN:
0927-7757
Subject:
X-radiation; X-ray photoelectron spectroscopy; adsorption; cations; chemical reactions; colloids; energy; ethanol; gold; ionic liquids; signal-to-noise ratio; silver; silver chloride
Abstract:
... X-ray photoelectron spectroscopy has been used to study the adsorption of two related imidazolium ionic liquids: 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide and 1-hexyl-3-methylimidazolium chloride (HMIM NTf2 and HMIM Cl) onto silver. In both cases, adsorption occurred from ethanol solutions. Conventional XPS allowed us to detect the adsorbed layers of ionic liquids, but the sign ...
DOI:
10.1016/j.colsurfa.2018.02.007

7. Adsorption of metal on pineapple leaf biochar: Key affecting factors, mechanism identification, and regeneration evaluation

Author:
Kesinee Iamsaard; Chih-Huang Weng; Li-Ting Yen; Jing-Hua Tzeng; Chakkrit Poonpakdee; Yao-Tung Lin
Source:
Bioresource technology 2022 v.344 pp. 126131
ISSN:
0960-8524
Subject:
Fourier transform infrared spectroscopy; X-radiation; X-ray photoelectron spectroscopy; adsorbents; adsorption; biochar; cation exchange; cations; leaves; pineapples; sorption isotherms; technology; wastewater
Abstract:
... Although tremendous works have been done on metal adsorption via biochar, mechanisms responsible for metal adsorption remain uncertain. This is the first work that provides direct evidence on the identification of Ni(II), Zn(II), and Cu(II) adsorption mechanisms on pineapple leaf biochar (PLB) using surface characteristics analyses, including X-ray photoelectron spectroscope (XPS), Fourier transfo ...
DOI:
10.1016/j.biortech.2021.126131

8. Aggregation Kinetics of Manganese Oxides Formed from permanganate activated by (Bi)sulfite: Dual Role of Ca2+ and MnII/III

Author:
Haijun Cheng; Jun Ma; Jin Jiang; Su-Yan Pang; Tao Yang; Panxin Wang
Source:
Water research 2019 v.159 pp. 454-463
ISSN:
0043-1354
Subject:
X-ray photoelectron spectroscopy; adsorption; bismuth; calcium; calcium nitrate; cations; coagulation; fulvic acids; light scattering; manganese oxides; nanoparticles; neutralization; oxidation; remediation; rivers; sodium nitrate; sulfites; water treatment; zeta potential
Abstract:
... Aqueous aggregation kinetics of manganese oxides, the solid products formed during water treatment and subsurface remediation with permanganate, are crucial for its application. In this study, manganese oxides nanoparticles were in situ formed in a permanganate/(bi)sulfite system, which was found to have excellent oxidation ability. Aggregation kinetics of such manganese oxides (i.e., MnOx-1.5, Mn ...
DOI:
10.1016/j.watres.2019.05.033

9. Air-oxidation of phenolic resin aerogels: backbone reorganization, formation of ring-fused pyrylium cations, and the effect on microporous carbons with enhanced surface areas

Author:
Hojat Majedi Far; Suraj Donthula; Tahereh Taghvaee; Adnan Malik Saeed; Zachary Garr; Chariklia Sotiriou-Leventis; Nicholas Leventis
Source:
RSC advances 2017 v.7 no.81 pp. 51104-51120
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; aerogels; air; aromatization; carbon; carbon dioxide; carbonization; cations; chemical analysis; chemical composition; ion exchange; moieties; nuclear magnetic resonance spectroscopy; phenolic resins; porosity; porous media; pyrolysis; sorption; surface area
Abstract:
... This paper is a thorough investigation of the chemical transformations during pyrolytic conversion of phenolic resins to carbons, and reports that all carbons obtained from main-stream phenolic resins including phloroglucinol–formaldehyde (FPOL), phloroglucinol–terephthalaldehyde (TPOL), resorcinol–formaldehyde (RF), and phenol–formaldehyde (PF) contain fused pyrylium rings and charge-compensating ...
DOI:
10.1039/c7ra10958j

10. Al-caustic starch coordination compounds: A new depressant for fine calcite

Author:
Ruolin Wang; Wenjuan Sun; Haisheng Han; Wei Sun; Zhao Wei; Jian Peng
Source:
Colloids and surfaces 2022 v.648 pp. 129268
ISSN:
0927-7757
Subject:
X-ray photoelectron spectroscopy; adsorption; calcite; calcium; cations; models; starch; surface area; zeta potential
Abstract:
... The flotation separation of scheelite from fine calcite is difficult due to the larger specific surface area and higher activity with flotation collectors. The selectivity of caustic starch as the depressant is poor, due to the -OH functional group reacting with the similar Ca²⁺ active sites of scheelite and calcite. In this paper, a novel structure of Al-caustic starch is prepared by the reaction ...
DOI:
10.1016/j.colsurfa.2022.129268

11. Alteration of onset potentials of Rh-doped SrTiO3 electrodes for photoelectrochemical water splitting

Author:
Mei Guo; Guijun Ma
Source:
Journal of catalysis 2020 v.391 pp. 241-246
ISSN:
0021-9517
Subject:
X-ray photoelectron spectroscopy; behavior; catalytic activity; cathodes; cations; energy; photocatalysts; reflectance; semiconductors; water
Abstract:
... Rh-doped SrTiO₃ (Rh-STO) is a visible-light-responsive oxide semiconductor photocatalyst with applications to water splitting. In this work, the onset potentials of the Rh-STO electrodes were shifted in a wide range from 0 to 1.2 V vs. RHE via changing the amount of Rh dopants, or adjusting the ratio of Ti³⁺/Rh⁴⁺,³⁺ cations through a vacuum-heating treatment. Namely, the photocathodic and photoano ...
DOI:
10.1016/j.jcat.2020.08.029

12. Alteration of the structure and function of photosystem I by Pb2+

Author:
Ahmed Belatik; Surat Hotchandani; Heidar-Ali Tajmir-Riahi; Robert Carpentier
Source:
Journal of photochemistry and photobiology 2013 v.123 pp. 41-47
ISSN:
1011-1344
Subject:
Fourier transform infrared spectroscopy; Spinacia oleracea; X-ray photoelectron spectroscopy; cations; electron transfer; fluorescence; lead; nitrogen; oxygen; photobiology; photooxidation; photosystem I; plastocyanin; protein conformation; spinach; toxicity
Abstract:
... The toxic effects of Pb2+ on photosynthetic electron transport were studied in photosystem I (PSI) submembrane fractions isolated from spinach. Structural and spectroscopic analysis using FTIR, fluorescence and X-ray photoelectron spectroscopy (XPS) showed that Pb2+ binds with proteins via oxygen and nitrogen atoms with an overall binding constant of KPb-PSI=4.9×103 (±0.2) M−1 and the number of bo ...
DOI:
10.1016/j.jphotobiol.2013.03.010

13. Amino Siloxane Oligomer Modified Graphene Oxide Composite for the Efficient Capture of U(VI) and Eu(III) from Aqueous Solution

Author:
Zhao Donglin; Chen Lili; Xu Mingwenchan; Feng Shaojie; Ding Yi; Wakeel M.; Alharbi Njud S.; Chen Changlun
Source:
ACS sustainable chemistry 2017 v.5 no.11 pp. 10290-10297
ISSN:
2168-0485
Subject:
X-ray photoelectron spectroscopy; aqueous solutions; cations; chelation; crosslinking; electrons; graphene oxide; models; nitrogen; polymers; sorption; sorption isotherms; synergism; uranium
Abstract:
... Poly 3-aminopropyltriethoxysilane is a highly reactive high-molecular polymer because of the existence of abundant amino groups, which presents a strong affinity toward different metal cations. In view of this, the novel poly amino siloxane oligomer modified graphene oxide composite (PAS–GO) was fabricated by a facile cross-linking reaction and applied to capture U(VI)/Eu(III) ions from aqueous so ...
DOI:
10.1021/acssuschemeng.7b02316

14. Anion Adsorption, Ti₃C₂Tz MXene Multilayers, and Their Effect on Claylike Swelling

Author:
Cooper A. Voigt; Michael Ghidiu; Varun Natu; Michel W. Barsoum
Source:
Journal of physical chemistry 2018 v.122 no.40 pp. 23172-23179
ISSN:
1932-7455
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; anions; carbides; cations; chemical analysis; energy-dispersive X-ray analysis; phosphoric acid; powders; washing
Abstract:
... MXenes are a relatively new and large family of two-dimensional early transition-metal carbides derived typically by etching the MAX phases in fluoride-containing solutions. Although numerous studies have investigated the role of cations in the interlayer distance (d₀₀₀₂) between MXene multilayers (MLs), little is known about the role of anions. Herein, using mainly X-ray diffraction, the effect o ...
DOI:
10.1021/acs.jpcc.8b07447

15. Antimicrobial activity of X zeolite exchanged with Cu2+ and Zn2+ on Escherichia coli and Staphylococcus aureus

Author:
Guangyuan Yao; Jingjing Lei; Wanzhong Zhang; Caihong Yu; Zhiming Sun; Shuilin Zheng; Sridhar Komarneni
Source:
Environmental science and pollution research international 2019 v.26 no.3 pp. 2782-2793
ISSN:
0944-1344
Subject:
Escherichia coli; Gram-negative bacteria; Gram-positive bacteria; Staphylococcus aureus; X-ray diffraction; X-ray fluorescence spectroscopy; X-ray photoelectron spectroscopy; antimicrobial properties; cations; copper; disinfection; ion exchange; microstructure; models; mortality; scanning electron microscopy; water pollution; zeolites; zinc
Abstract:
... The biocidal cations of Cu²⁺ and Zn²⁺ were hosted on the surfaces and in the cavities of X zeolite via ion exchange. The microstructure and interface properties of the exchanged zeolite X samples were analyzed by XRD, SEM, XPS, and XRF. The as-prepared samples showed excellent antimicrobial activity towards gram-negative bacteria of Escherichia coli and gram-positive bacteria of Staphylococcus aur ...
DOI:
10.1007/s11356-018-3750-z

16. Apple PeelsA Versatile Biomass for Water Purification?

Author:
Mallampati Ramakrishna; Valiyaveettil Suresh
Source:
ACS Applied Materials & Interfaces 2013 v.5 no.10 pp. 4443-4449
ISSN:
1944-8252
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorbents; adsorption; anions; apple peels; aqueous solutions; arsenates; arsenites; biodegradability; biomass; cations; desorption; drinking water; electrostatic interactions; energy-dispersive X-ray analysis; equations; pH; phosphates; pollutants; scanning electron microscopy; sorption isotherms; toxicity; water purification; zirconium
Abstract:
... The presence of anions such as chromate, arsenate, and arsenite in drinking water is a major health concern in many parts of the world due to their high toxicity. Removal of such anions from water using low cost biomass is an efficient and affordable treatment process. Owing to the easy availability and biodegradability, we chose to use apple peel as a substrate for our investigations. Zirconium c ...
DOI:
10.1021/am400901e

17. Application of XPS method in the research into Ni ion-modified montmorillonite as a SO₂ sorbent

Author:
D. Olszewska
Source:
Fuel processing technology 2012 v.95 no. pp. 90-95
ISSN:
0378-3820
Subject:
X-ray photoelectron spectroscopy; adsorption; argon (noble gases); bentonite; cations; coal; combustion; emissions; montmorillonite; nickel; nitrates; sulfur dioxide
Abstract:
... A series of montmorillonites with adsorbed nickel ions was prepared through adsorption of nitrates from water solutions; there were four methods adopted. The surface of the sample under modification was investigated with the method of argon adsorption and XPS (X-ray photoelectron spectroscopy). SO₂ was investigated on nickel-modified montmorillonites. Nickel cations were adsorbed on the montmorill ...
DOI:
10.1016/j.fuproc.2011.11.023

18. Aptamer conjugated Mo₆S₉₋ₓIₓ nanowires for direct and highly sensitive electrochemical sensing of thrombin

Author:
Martin McMullan; Nijuan Sun; Pagona Papakonstantinou; Meixian Li; Wuzong Zhou; Dragan Mihailovic
Source:
Biosensors & bioelectronics 2011 v.26 no.5 pp. 1853-1859
ISSN:
0956-5663
Subject:
X-ray photoelectron spectroscopy; ammonia; biosensors; blood coagulation; cations; detection limit; electrochemistry; electrodes; gold; monitoring; nanowires; oligonucleotides; pathogens; thrombin; transmission electron microscopy
Abstract:
... We demonstrate the use of a novel electrochemical sensing platform based on aptamer conjugated Mo₆S₉₋ₓIₓ nanowires (MoSI NWs) for the highly sensitive detection of the blood clotting enzyme thrombin. MoSI NWs nanowires were self-assembled on a gold electrode to which thrombin binding aptamers were covalently attached. The modification and immobilization steps of the electrodes were characterised b ...
DOI:
10.1016/j.bios.2010.01.030

19. Argon Embedded by Ion Bombardment: Relevance of Hidden Dopants in Rutile TiO₂

Author:
Lars Mohrhusen; Jessica Kräuter; Michael Willms; Katharina Al-Shamery
Source:
Journal of physical chemistry 2019 v.123 no.33 pp. 20434-20442
ISSN:
1932-7455
Subject:
X-ray photoelectron spectroscopy; annealing; argon (noble gases); cations; desorption; oxidants; temperature; titanium dioxide
Abstract:
... To obtain a mechanistic understanding of occurring processes on oxide surfaces at the atomic level, systematic studies under ultra-high vacuum (UHV) conditions on single crystalline surfaces are commonly used. Usually, the sample preparation protocol for these surfaces includes argon-ion bombardment followed by annealing at elevated temperatures. For reduceable metal oxides, this leads to a signif ...
DOI:
10.1021/acs.jpcc.9b05975

20. Atomic-Scale Structure of the Hematite α-Fe2O3(11̅02) “R-Cut” Surface

Author:
Florian Kraushofer; Zdenek Jakub; Magdalena Bichler; Jan Hulva; Peter Drmota; Michael Weinold; Michael Schmid; Martin Setvin; Ulrike Diebold; Peter Blaha; Gareth S. Parkinson
Source:
Journal of physical chemistry 2018 v.122 no.3 pp. 1657-1669
ISSN:
1932-7455
Subject:
X-ray photoelectron spectroscopy; annealing; atomic force microscopy; cations; density functional theory; hematite; iron; models; oxygen; scanning tunneling microscopy
Abstract:
... The α-Fe₂O₃(11̅02) surface (also known as the hematite r-cut or (012) surface) was studied using low-energy electron diffraction (LEED), X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), scanning tunneling microscopy (STM), noncontact atomic force microscopy (nc-AFM), and ab initio density functional theory (DFT)+U calculations. Two surface structures are stable ...
DOI:
10.1021/acs.jpcc.7b10515
PubMed:
29492182
PubMed Central:
PMC5823487

21. Band Alignments, Band Gap, Core Levels, and Valence Band States in Cu₃BiS₃ for Photovoltaics

Author:
Thomas J. Whittles; Tim D. Veal; Christopher N. Savory; Peter J. Yates; Philip A. E. Murgatroyd; James T. Gibbon; Max Birkett; Richard J. Potter; Jonathan D. Major; Ken Durose; David O. Scanlon; Vinod R. Dhanak
Source:
ACS applied materials & interfaces 2019 v.11 no.30 pp. 27033-27047
ISSN:
1944-8252
Subject:
Raman spectroscopy; X-ray photoelectron spectroscopy; absorption; ambient temperature; bismuth; cadmium sulfide; cations; cleaning; copper; copper zinc tin sulfide; density functional theory; gallium; indium; ionization; models; solar energy; spectral analysis
Abstract:
... The earth-abundant semiconductor Cu₃BiS₃ (CBS) exhibits promising photovoltaic properties and is often considered analogous to the solar absorbers copper indium gallium diselenide (CIGS) and copper zinc tin sulfide (CZTS) despite few device reports. The extent to which this is justifiable is explored via a thorough X-ray photoemission spectroscopy (XPS) analysis: spanning core levels, ionization p ...
DOI:
10.1021/acsami.9b04268

22. Batch reactor vs. flow column – Mechanistic investigation and modeling of Au(III) ions adsorption from aqueous solutions containing Ni2+, Na+, Cl− and ClO4− as impurities

Author:
Marek Wojnicki; Pierrick Nabec; Magdalena Luty–Błocho; Robert Socha; Xuegeng Yang; Zbigniew Pędzich
Source:
Sustainable materials and technologies 2020 v.23 pp. e00142
ISSN:
2214-9937
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; activated carbon; activation energy; adsorption; aqueous solutions; batch systems; cations; chlorides; equations; gold; mass transfer; models; nickel; perchlorates; scanning electron microscopy; sodium
Abstract:
... In this paper, a mechanistic analysis of the adsorption and reduction of gold(III) chloride complex ions on the activated carbon surface were described. All experiments were performed in the presence of nickel ions. Obtained results confirm that there is no influence of light and heavy cations on the adsorption process. From the Arrhenius equation, activation parameters such as activation energy ( ...
DOI:
10.1016/j.susmat.2019.e00142

23. Binding of Sb(III) by Sb-tolerant Bacillus cereus cell and cell-goethite composite: implications for Sb mobility and fate in soils and sediments

Author:
Ming Lei; Jie Tao; Ruijia Yang; Boqing Tie; Xiaoli Liu; Xiangdong Wei; Huihui Du
Source:
Journal of soils and sediments 2019 v.19 no.6 pp. 2850-2858
ISSN:
1439-0108
Subject:
Bacillus cereus; X-ray photoelectron spectroscopy; adsorption; antimony; cations; goethite; moieties; pH; scanning electron microscopes; sediments; soil; soil bacteria; sorbents; sorption isotherms
Abstract:
... PURPOSE: Adsorption onto mineral and bacterial surfaces can profoundly affect the mobility and fate of dissolved ions in soils; however, currently, there is a poor understanding of antimony (Sb) adsorption onto mixture of these two sorbents. This study aims at investigating the adsorption of Sb(III) to an antimony-tolerant soil bacterium Bacillus cereus and cell-goethite binary composite under ana ...
DOI:
10.1007/s11368-019-02272-z

24. Bio-inspired terpolymers containing dopamine, cations and MPC: a versatile platform to construct a recycle antibacterial and antifouling surface

Author:
B. L. Wang; T. W. Jin; Y. M. Han; C. H. Shen; Q. Li; Q. K. Lin; H. Chen
Source:
Journal of materials chemistry B 2015 v.3 no.27 pp. 5501-5510
ISSN:
2050-7518
Subject:
Escherichia coli; Staphylococcus aureus; X-ray photoelectron spectroscopy; antifouling activities; atomic force microscopy; bacteria; bacterial adhesion; biocompatible materials; biofilm; biomimetics; cadaver; cations; chemical bonding; coatings; contact angle; dopamine; free radicals; gel chromatography; hydrophilicity; nuclear magnetic resonance spectroscopy; phosphorylcholine
Abstract:
... A new kind of bio-inspired terpolymer was synthesized by a conventional free radical terpolymerization of dopamine methacrylamide (DMA), 2-(dimethylamino)-ethyl methacrylate (DMAEMA) and 2-methacryloyloxyethyl phosphorylcholine (MPC) with azobisisobutyronitrile (AIBN) as an initiator. DMA consists of a biomimetic adhesive side chain covalently linked to a polymerizable methacrylate monomer. ¹H NMR ...
DOI:
10.1039/c5tb00597c

25. Biogenic N-P-codoped TiO₂: Synthesis, characterization and photocatalytic properties

Author:
Han, Ting; Fan, Tongxiang; Chow, Suk-Kwun; Zhang, Di
Source:
Bioresource technology 2010 v.101 no.17 pp. 6829-6835
ISSN:
0960-8524
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; absorption; anions; cations; crops; crystals; irradiation; lamps; metals; nitrogen; oxides; phosphorus; red light; seeds
Abstract:
... Four typical kinds of crop seeds are studied as non-metallic bio-precursors to synthesize biogenic N-P-codoped TiO₂ (BNP-TiO₂). The as-prepared BNP-TiO₂ samples are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), nitrogen-adsorption measurement and UV-Vis spectroscopy. The results show that BNP-TiO₂ possesses single anatase phase with mesopore structures, and nitr ...
DOI:
10.1016/j.biortech.2010.03.107

26. Bioinspired Aryldiazonium Carbohydrate Coatings: Reduced Adhesion of Foulants at Polymer and Stainless Steel Surfaces in a Marine Environment

Author:
Adam Myles; Damien Haberlin; Leticia Esteban-Tejeda; M. Daniela Angione; Michelle P. Browne; Md. Khairul Hoque; Thomas K. Doyle; Eoin M. Scanlan; Paula E. Colavita
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.1 pp. 1141-1151
ISSN:
2168-0485
Subject:
X-ray photoelectron spectroscopy; adenosine triphosphate; adhesion; adsorption; aquaculture; biofouling; biomass production; carbohydrates; cations; coastal water; coatings; contact angle; environmental monitoring; fluorescence; hydrophilicity; image analysis; infrared spectroscopy; laboratory experimentation; light microscopy; marine environment; polymers; stainless steel
Abstract:
... Surface treatments that minimize biofouling in marine environments are of interest for a variety of applications such as environmental monitoring and aquaculture. We report on the effect of saccharide coatings on biomass accumulation at the surface of three materials that find applications in marine settings: stainless steel 316 (SS316), Nylon-6 (N-6), and poly(ether sulfone) (PES). Saccharides we ...
DOI:
10.1021/acssuschemeng.7b03443

27. Bioinspired electro-permeable glycans on carbon: Fouling control for sensing in complex matrices

Author:
James A. Behan; Adam Myles; Alessandro Iannaci; Éadaoin Whelan; Eoin M. Scanlan; Paula E. Colavita
Source:
Carbon 2020 v.158 pp. 519-526
ISSN:
0008-6223
Subject:
X-ray photoelectron spectroscopy; adsorption; agglutinins; bovine serum albumin; caffeine; carbon; cations; contact angle; crosslinking; electrochemistry; fluorescence; fouling; glassy carbon electrode; lectins; peanuts; polysaccharides
Abstract:
... The effect of glycan adlayers on the electrochemical response of glassy carbon electrodes was studied using standard redox probes and complex aqueous matrices. Aryldiazonium cations of aryl-lactoside precursors were used to modify glassy carbon via spontaneous and electrochemically assisted covalent grafting. Contact angle and fluorescence binding using Peanut Agglutinin (PNA) as a diagnostic lect ...
DOI:
10.1016/j.carbon.2019.11.020

28. Biomineralization of Pd nanoparticles using Phanerochaete chrysosporium as a sustainable approach to turn platinum group metals (PGMs) wastes into catalysts

Author:
Sophie Tarver; Daniel Gray; Konstantin Loponov; Diganta B. Das; Tao Sun; Maria Sotenko
Source:
International biodeterioration & biodegradation 2019 v.143 pp. 104724
ISSN:
0964-8305
Subject:
Phanerochaete chrysosporium; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; aqueous solutions; biomineralization; catalysts; catalytic activity; cations; chitin; fermentation; fungal biomass; fungal growth; fungi; industrial effluents; iodobenzenes; mycelium; nanoparticles; palladium; platinum; proteins; sorption isotherms; styrene; transmission electron microscopy
Abstract:
... Due to the increasing demand for recovery of precious metals from waste streams, the role of fungus as a potential adsorbent is growing. Thus, this research aimed to develop a novel method for the biomineralization of palladium nanoparticles using Phanerochaete chrysosporium fungus. The adsorption of palladium onto the fungal mycelium was studied by adding palladium salt at 12–48 ppm to the fermen ...
DOI:
10.1016/j.ibiod.2019.104724

29. CO-PROX Reaction over Co₃O₄Al₂O₃ Catalysts—Impact of the Spinel Active Phase Faceting on the Catalytic Performance

Author:
Gabriela Grzybek; Klaudia Ciura; Joanna Gryboś; Paulina Indyka; Arantxa Davó-Quiñonero; Dolores Lozano-Castelló; Agustin Bueno-Lopez; Andrzej Kotarba; Zbigniew Sojka
Source:
Journal of physical chemistry 2019 v.123 no.33 pp. 20221-20232
ISSN:
1932-7455
Subject:
Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; active sites; carbon monoxide; catalysts; catalytic activity; cations; cobalt; cobalt oxide; fluorescence; glycerol; oxidation; oxygen; thermodynamics; transmission electron microscopy; zinc
Abstract:
... A series of α-alumina-supported cobalt spinel catalysts of various expositions of the (100), (111), and (110) planes was synthesized and tested in the preferential oxidation of CO (CO-PROX) reaction. Successful control of the polyhedral shape of the nanospinel active phase was achieved via glycerol and/or Zn addition to the impregnation solution. This allowed for the application of such catalysts ...
DOI:
10.1021/acs.jpcc.9b03025

30. CO2 Reactivity on Cobalt-Based Perovskites

Author:
Jonathan Hwang; Reshma R. Rao; Yu Katayama; Dongkyu Lee; Xiao Renshaw Wang; Ethan Crumlin; Thirumalai Venkatesan; Ho Nyung Lee; Yang Shao-Horn
Source:
Journal of physical chemistry 2018 v.122 no.35 pp. 20391-20401
ISSN:
1932-7455
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; barium; carbon; carbon dioxide; carbonates; cations; cobalt; fuel cells; oxidation; oxygen; physical chemistry; strontium
Abstract:
... Understanding the interaction of CO₂ with perovskite metal oxide surfaces is crucial for the design of various perovskite (electro)chemical functionalities, such as solid oxide fuel cells, catalytic oxidation reactions, and gas sensing. In this study, we experimentally investigated the reactivity of CO₂ with a series of cobalt-based perovskites (i.e., LaCoO₃, La₀.₄Sr₀.₆CoO₃, SrCoO₂.₅, and Pr₀.₅Ba₀ ...
DOI:
10.1021/acs.jpcc.8b06104

31. Cadmium (Cd²⁺) removal by nano zerovalent iron: surface analysis, effects of solution chemistry and surface complexation modeling

Author:
Hardiljeet K. Boparai; Meera Joseph; Denis M. O’Carroll
Source:
Environmental science and pollution research international 2013 v.20 no.9 pp. 6210-6221
ISSN:
0944-1344
Subject:
X-radiation; X-ray photoelectron spectroscopy; adsorption; cadmium; capacitance; cations; ionic strength; iron; models; pH; pollutants; water pollution
Abstract:
... Nano zerovalent iron (nZVI) is an effective remediant for removing various organic and inorganic pollutants from contaminated water sources. Batch experiments were conducted to characterize the nZVI surface and to investigate the effects of various solution properties such as pH, initial cadmium concentration, sorbent dosage, ionic strength, and competitive ions on cadmium removal by nZVI. Energy- ...
DOI:
10.1007/s11356-013-1651-8

32. Carbohydrate-based activated carbon with high surface acidity and basicity for nickel removal from synthetic wastewater

Author:
Hai Liu; Jian Zhang; Huu Hao Ngo; Wenshan Guo; Haiming Wu; Cheng Cheng; Zizhang Guo; Chenglu Zhang
Source:
RSC advances 2015 v.5 no.64 pp. 52048-52056
ISSN:
2046-2069
Subject:
Phragmites australis; X-ray photoelectron spectroscopy; acidity; activated carbon; adsorption; cations; chemical reactions; desorption; electrostatic interactions; glucose; nickel; nitrogen; phosphoric acid; pollution; scanning electron microscopy; starch; sucrose; surface area; titration; wastewater
Abstract:
... The feasibility of preparing activated carbon (AC-CHs) from carbohydrates (glucose, sucrose and starch) with phosphoric acid activation was evaluated by comparing its physicochemical properties and Ni(ii) adsorption performance with a reference activated carbon (AC-PA) derived from Phragmites australis. The textural and chemical properties of the prepared activated carbon were characterized by N₂ ...
DOI:
10.1039/c5ra08987e

33. Carbon-based dots co-doped with nitrogen and sulfur for Cr(vi) sensing and bioimaging

Author:
Yang Liu; Xiaojuan Gong; Yifang Gao; Shengmei Song; Xin Wu; Shaomin Shuang; Chuan Dong
Source:
RSC advances 2016 v.6 no.34 pp. 28477-28483
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; acetylcysteine; carbon quantum dots; cations; chromium; citric acid; detection limit; dispersibility; fluorescence; image analysis; microwave treatment; nitrogen; optical properties; pH; photoluminescence; pyrolysis; sulfur; toxic substances; transmission electron microscopy; ultraviolet-visible spectroscopy; wavelengths
Abstract:
... Less toxic elements nitrogen and sulfur co-doped carbon-based dots (NSCDs) have been prepared by microwave-assisted pyrolysis of citric acid and N-acetyl-l-cysteine as the carbon source and N,S-dopant, respectively. The structure and optical properties of NSCDs are characterized by transmission electron microscopy, X-ray photoelectron spectroscopy, elemental analysis, Fourier transform infrared sp ...
DOI:
10.1039/c6ra02653b

34. Carbonate coprecipitation preparation of Li-rich layered oxides using the oxalate anion ligand as high-energy, high-power and durable cathode materials for lithium-ion batteries

Author:
Long Xu; Peiyu Hou; Yantao Zhang; Hongzhou Zhang; Dawei Song; Xixi Shi; Xiaoqing Wang; Lianqi Zhang
Source:
Journal of materials chemistry A 2015 v.3 no.42 pp. 21219-21226
ISSN:
2050-7496
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; ammonia; carbonates; cathodes; cations; coprecipitation; energy density; ligands; lithium batteries; manganese; mixing; oxalates; oxidation; oxides; phase transition; scanning electron microscopy; toxicity; transmission electron microscopy
Abstract:
... Rechargeable lithium-ion batteries (LIBs) present an urgent demand to develop cathode materials that combine high-energy and high-power density with long cycle life. For meeting the demand, dual ligands (ammonia and oxalate anion) by hydroxide coprecipitation have been introduced to prepare spherical precursors for the above desired cathode in our previous study, in which low efficiency, toxic and ...
DOI:
10.1039/c5ta04157k

35. Catalytic Epoxidation of cis-Cyclooctene over Vanadium-Exchanged Faujasite Zeolite Catalyst with Ionic Liquid as Cosolvent

Author:
Bai Linlu; Li Kaixin; Yan Yibo; Jia Xinli; Lee Jong-Min; Yang Yanhui
Source:
ACS sustainable chemistry 2016 v.4 no.2 pp. 437-444
ISSN:
2168-0485
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; activation energy; active sites; adsorption; byproducts; catalysts; catalytic activity; cations; dimethylformamide; hydrogen bonding; ionic liquids; nuclear magnetic resonance spectroscopy; oxidants; scanning electron microscopy; ultraviolet-visible spectroscopy; vanadium; zeolites
Abstract:
... Introducing ionic liquid (IL) 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([emim][NTf₂]) into dimethylformamide (DMF) as a cosolvent remarkably promoted the catalytic epoxidation of cis-cyclooctene over vanadium-exchanged faujasite zeolite catalysts (V-X), using tert-butyl hydroperoxide (TBHP) as the oxidant. The XRD spectra and SEM images show a certain destructive effect of IL ...
DOI:
10.1021/acssuschemeng.5b00854

36. Cathode healing methods for recycling of lithium-ion batteries

Author:
Steve E. Sloop; Lauren Crandon; Marshall Allen; Michael M. Lerner; Hanyang Zhang; Weekit Sirisaksoontorn; Linda Gaines; Joon Kim; Myongjai Lee
Source:
Sustainable materials and technologies 2019 v.22 pp. e00113
ISSN:
2214-9937
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; cathodes; cations; electric vehicles; energy; industry; lithium; lithium batteries; mixing; models; nickel; recycling
Abstract:
... The electric vehicle and energy storage industries will generate over one-million tons per annum of lithium-ion for recycling in the next decade. There are significant technology gaps in the recovery of lithium-ion battery materials that threaten the sustainability of these industries. Cathode healing is introduced here as a new approach to produce low cost (i.e. < $10/kg), recycled, battery grade ...
DOI:
10.1016/j.susmat.2019.e00113

37. Cation Exchange at the Interfaces of Ultrathin Films of Fluorous Ionic Liquids on Ag(111)

Author:
Matthias Lexow; Bettina S. J. Heller; Gabriel Partl; Radha G. Bhuin; Florian Maier; Hans-Peter Steinrück
Source:
Langmuir 2018 v.35 no.2 pp. 398-405
ISSN:
1520-5827
Subject:
X-ray photoelectron spectroscopy; ambient temperature; cation exchange; cations; desorption; ionic liquids; silver
Abstract:
... In the context of applications with thin ionic liquid (IL) films on solid supports, we studied the ion distribution within mixed thin IL films by angle-resolved X-ray photoelectron spectroscopy. After the deposition of 1-methyl-3-octylimidazolium hexafluorophosphate, [C₈C₁Im][PF₆], on top of a wetting layer (WL) of 3-methyl-1-(3,3,4,4,4-pentafluorobutyl)imidazolium hexafluorophosphate, [PFBMIm][PF ...
DOI:
10.1021/acs.langmuir.8b03517
PubMed:
30540199
PubMed Central:
PMC6377181

38. Cation accumulation leads to the electrode aging in soil microbial fuel cells

Author:
Xiaojing Li; Yue Li; Xiaodong Zhao; Liping Weng; Yongtao Li
Source:
Journal of soils and sediments 2018 v.18 no.3 pp. 1003-1008
ISSN:
1439-0108
Subject:
X-ray photoelectron spectroscopy; aluminum; anodes; biosensors; calcium; cathodes; cations; corrosion; electrophysiology; iron; magnesium; microbial fuel cells; pollutants; remediation; scanning electron microscopy; sodium; soil; surveys
Abstract:
... PURPOSE: The electrode aging in soil microbial fuel cells (MFCs) disturbed the removal of pollutants and sensitivity of electrophysiological signal. Therefore, surveying the causes of aging electrodes could assist to take the prevention measures for remediation and biosensor application of soil MFCs. MATERIALS AND METHODS: The surface morphology, element accumulation on the surface of electrodes, ...
DOI:
10.1007/s11368-017-1785-2

39. Cation capture and overcharging of a hydrophobized quartz surface in concentrated potassium chloride solutions

Author:
Ludmila B. Boinovich; Vladimir D. Sobolev; Konstantin I. Maslakov; Alexandr G. Domantovsky; Inessa P. Sergeeva; Alexandre M. Emelyanenko
Source:
Colloids and surfaces 2018 v.537 pp. 76-84
ISSN:
0927-7757
Subject:
X-ray photoelectron spectroscopy; cations; hydrolysis; hydrophobicity; potassium chloride; quartz; salt concentration; scanning electron microscopy; wettability; zeta potential
Abstract:
... The paper presents experimental data indicating interesting new phenomena related to overcharging of a hydrophobic surface in concentrated potassium chloride solutions. We attribute these data to cation complexation and capture of the cations by the hydrophobic surface. The analysis of the mechanism of the detected phenomena is based on capillary electrokinetic and wettability studies and confirme ...
DOI:
10.1016/j.colsurfa.2017.10.023

40. Cation-group interaction as the predominant force for adsorption of substituted dinitrobenzenes by smectite clays

Author:
Liang Li; G. Daniel Sheng
Source:
Environmental science and pollution research international 2019 v.26 no.23 pp. 24223-24234
ISSN:
0944-1344
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorption; cations; chemical bonding; electron transfer; electrostatic interactions; isomers; molecular dynamics; nitroaromatic compounds; polluted soils; potassium; silicon; simulation models; smectite; soil remediation
Abstract:
... Elucidation of the interaction between NACs and smectites is important to the understanding of the potential for transport of nitroaromatic compounds (NACs) in soils and to implementation of NAC-contaminated soil remediation. The adsorption of dinitrotoluene isomers (DNTs) and substituted dinitrobenzenes (SDNBs) by smectite was determined by batch equilibration and characterized by FTIR and XPS, a ...
DOI:
10.1007/s11356-019-05707-9

41. Change in Organic Molecule Adhesion on α-Alumina (Sapphire) with Change in NaCl and CaCl2 Solution Salinity

Author:
Juhl K. M. S.; Bovet N.; Hassenkam T.; Dideriksen K.; Pedersen C. S.; Jensen C. M.; Okhrimenko D. V.; Stipp S. L. S.
Source:
Langmuir 2014 v.30 no.29 pp. 8741-8750
ISSN:
1520-5827
Subject:
X-ray photoelectron spectroscopy; adhesion; adsorption; aluminum oxide; atomic force microscopy; bones; calcium; calcium chloride; cations; clay minerals; contact angle; drinking water; hydrogen bonding; models; moieties; nanomaterials; oils; pH; polluted soils; protons; pyridines; remediation; salinity; sodium; sodium chloride; surface tension; teeth; wafers; water treatment
Abstract:
... We investigated the adhesion of two functional groups to α-alumina as a model for the adsorption of organic molecules on clay minerals. Interactions between organic compounds and clay minerals play an important role in processes such as drinking water treatment, remediation of contaminated soil, oil recovery, and fabricating complicated nanomaterials, and there have been claims that organic compou ...
DOI:
10.1021/la500791m

42. Characterization of a compound bioflocculant produced by mixed culture of Rhizobium radiobacter F2 and Bacillus sphaeicus F6

Author:
Lili Wang; Fang Ma; Yuanyuan Qu; Dezhi Sun; Ang Li; Jingbo Guo; Bing Yu
Source:
World journal of microbiology & biotechnology 2011 v.27 no.11 pp. 2559-2565
ISSN:
0959-3993
Subject:
Rhizobium; X-ray photoelectron spectroscopy; cations; chromatography; flocculation; galactose; glucose; mannose; mixed culture; molecular weight; pH; rhamnose; thermal stability; viscosity
Abstract:
... A compound bioflocculant CBF-F26, produced by mixed culture of Rhizobium radiobacter F2 and Bacillus sphaeicus F6, was investigated with regard to its physicochemical and flocculating properties. It was identified as a polysaccharide bioflocculant composed of rhamnose, mannose, glucose, and galactose, respectively, in a 1.3: 2.1: 10.0: 1.0 molar ratio. The average molecular weight was determined a ...
DOI:
10.1007/s11274-011-0726-2

43. Characterization of soil particles by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR) and transmission electron microscopy (TEM)

Author:
Flogeac, K.; Guillon, E.; Aplincourt, M.; Marceau, E.; Stievano, L; Beaunier, P.; Frapart, Y.M.
Source:
Agronomy for sustainable development 2005 v.25 no.3 pp. 345-353
ISSN:
1774-0746
Subject:
X-ray photoelectron spectroscopy; X-ray diffraction; soil pollution; organic matter; sorption; electron microscopy; cations; pollutants; soil structure; electron paramagnetic resonance spectroscopy; soil texture; soil pH; metals; polluted soils; France

44. Charge and Pressure-Tuned Surface Patterning of Surfactant-Encapsulated Polyoxometalate Complexes at the Air–Water Interface

Author:
Xu Miao; Li Haolong; Zhang Liying; Wang Yizhan; Yuan Yuan; Zhang Jianming; Wu Lixin
Source:
Langmuir 2012 v.28 no.41 pp. 14624-14632
ISSN:
1520-5827
Subject:
X-ray photoelectron spectroscopy; atomic force microscopy; cationic surfactants; cations; energy
Abstract:
... In this paper, four organic–inorganic hybrid complexes were prepared using a cationic surfactant dimethyldioctadecylammonium (DODA) to replace the counter cations of four Keggin-type polyoxometalate (POM) clusters with gradually increased negative charges, PW₁₂O₄₀³–, SiW₁₂O₄₀⁴–, BW₁₂O₄₀⁵–, and CoW₁₂O₄₀⁶–. The formed surfactant-encapsulated POM (SEP) complexes showed typical amphiphilic properties ...
DOI:
10.1021/la302888s

45. Charge storage mechanism of activated manganese oxide composites for pseudocapacitors

Author:
Tzu-Ho Wu; David Hesp; Vin Dhanak; Christopher Collins; Filipe Braga; Laurence J. Hardwick; Chi-Chang Hu
Source:
Journal of materials chemistry A 2015 v.3 no.24 pp. 12786-12795
ISSN:
2050-7496
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; active sites; annealing; birnessite; cations; electrochemistry; manganese; manganese acetate; manganese dioxide; manganese monoxide; microscopy; monitoring; protons; redox reactions; sodium sulfate
Abstract:
... Manganese oxides can undergo an electrochemical activation step that leads to greater capacitances, of which the structural change and mechanism remains poorly understood. Herein we present a wide-ranging study on a manganese oxide synthesised by annealing manganese(ii) acetate precursor to 300 °C, which includes in operando monitoring of the structural evolution during the activation process via ...
DOI:
10.1039/c5ta03334a

46. Chemical Analysis and Molecular Models for Calcium–Oxygen–Carbon Interactions in Black Carbon Found in Fertile Amazonian Anthrosoils

Author:
Archanjo Braulio S.; Araujo Joyce R.; Silva Alexander M.; Capaz Rodrigo B.; Falcão Newton P. S.; Jorio Ado; Achete Carlos A.
Source:
Environmental Science & Technology 2014 v.48 no.13 pp. 7445-7452
ISSN:
1520-5851
Subject:
X-ray photoelectron spectroscopy; calcium; carbon; cations; chemical analysis; energy-dispersive X-ray analysis; graphene oxide; humid tropics; molecular models; nanoparticles; oxygen; soil fertility; terra preta; transmission electron microscopy
Abstract:
... Carbon particles containing mineral matter promote soil fertility, helping it to overcome the rather unfavorable climate conditions of the humid tropics. Intriguing examples are the Amazonian Dark Earths, anthropogenic soils also known as “Terra Preta de Índio’’ (TPI), in which chemical recalcitrance and stable carbon with millenary mean residence times have been observed. Recently, the presence ...
DOI:
10.1021/es501046b

47. Chemical sensing platform for the Zn+2 ions based on poly(o-anisidine-co-methyl anthranilate) copolymer composites and their environmental remediation in real samples

Author:
Aftab Aslam Parwaz Khan; Anish Khan; M.A. Alam; Mohammad Oves; Abdullah M Asiri; Mohammed M. Rahman; Inamuddin
Source:
Environmental science and pollution research international 2018 v.25 no.28 pp. 27899-27911
ISSN:
0944-1344
Subject:
Bacillus subtilis; Escherichia coli; Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; calibration; cations; composite polymers; detection limit; electrochemistry; glassy carbon electrode; nanomaterials; phosphates; polymerization; remediation; scanning electron microscopes; scanning electron microscopy; sodium dodecylbenzenesulfonate; surfactants; thermogravimetry; ultraviolet-visible spectroscopy; zinc
Abstract:
... A novel nanostructure of poly(o-anisidine-co-methyl anthranilate) (poly(Ani-Co-MA) copolymer has been synthesized by chemical oxidative in situ polymerization technique with equal molar proportion of monomers in the presence of sodium dodecylbenzene sulfonic acid (SDBS) surfactant. The synthesized copolymers were characterized by scanning electron microscope (SEM) and X-ray crystallography (XRD), ...
DOI:
10.1007/s11356-018-2819-z

48. Chromium removal using a magnetic corncob biochar/polypyrrole composite by adsorption combined with reduction: Reaction pathway and contribution degree

Author:
Yuqing Yang; Nan Chen; Chuanping Feng; Miao Li; Yu Gao
Source:
Colloids and surfaces 2018 v.556 pp. 201-209
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorbents; adsorption; anion exchange; anions; biochar; cations; chelation; chlorides; chromium; colloids; corn cobs; electrostatic interactions; liquids; magnetism; models; moieties; pH; pyrroles; scanning electron microscopy; sorption isotherms; toxicity; wastewater
Abstract:
... Cr(VI)-containing wastewater is drawing more and more attention due to its high toxicity. In this study, a novel magnetic adsorbent for Cr(VI) removal was synthesized by decorating corncob biochar with polypyrrole (PPy) (MBC/PPy). Scanning electron microscopy (SEM), fourier transform infrared spectra (FTIR), X-ray photoelectron spectroscopy (XPS) and vibrating sample magnetometer (VSM) were used t ...
DOI:
10.1016/j.colsurfa.2018.08.035

49. Co-adsorption of phosphate and zinc(II) on the surface of ferrihydrite

Author:
Jing Liu; Runliang Zhu; Tianyuan Xu; Yin Xu; Fei Ge; Yunfei Xi; Jianxi Zhu; Hongping He
Source:
Chemosphere 2016 v.144 pp. 1148-1155
ISSN:
0045-6535
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorption; aqueous solutions; cations; electrostatic interactions; ferrihydrite; heavy metals; pH; phosphates; reflectance; solutes; zinc
Abstract:
... Ferrihydrite (Fh) is of great importance in affecting the migration and transformation of heavy-metal cations and oxyanions. To advance the understanding of co-adsorption reactions on Fh surface, the co-adsorption of phosphate and Zn(II) from aqueous solution to a synthesized Fh was determined. The batch experiments demonstrated a synergistic adsorption of phosphate and Zn(II) on Fh. In the pH ran ...
DOI:
10.1016/j.chemosphere.2015.09.083

50. Cobalt-iron (oxides) water oxidation catalysts: Tracking catalyst redox states and reaction dynamic mechanism

Author:
Jianfang Meng; Zhenduo Cui; Xianjin Yang; Shengli Zhu; Zhaoyang Li; Kezhen Qi; Lirong Zheng; Yanqin Liang
Source:
Journal of catalysis 2018 v.365 pp. 227-237
ISSN:
0021-9517
Subject:
X-ray absorption spectroscopy; X-ray photoelectron spectroscopy; adsorption; alloys; catalysts; cations; chemical reduction; cobalt; cobalt oxide; density functional theory; electrical conductivity; energy; ferric oxide; iron; iron oxyhydroxides; maghemite; oxidation; oxygen; oxygen production; potassium hydroxide
Abstract:
... Developing earth-abundant materials to replace the traditional noble metals in water splitting to meet industrial requirements remains a challenge. Cobalt-iron (oxides) have been widely studied as electrocatalysts for the oxygen evolution reaction (OER), yet our understanding of the OER dynamic reactivity related to the oxidation state changes as well the adsorption energies of surface species on ...
DOI:
10.1016/j.jcat.2018.06.031

51. Colorimetric determination of Hg2+ in environmental water based on the Hg2+-stimulated peroxidase mimetic activity of MoS2-Au composites

Author:
Chunmeng Ma; Yao Ma; Yifan Sun; Yuan Lu; Enlin Tian; Jingfeng Lan; Jialu Li; Weichun Ye; Haixia Zhang
Source:
Journal of colloid and interface science 2019 v.537 pp. 554-561
ISSN:
0021-9797
Subject:
X-ray photoelectron spectroscopy; cations; colorimetry; detection limit; enzyme kinetics; gold; hydrogen peroxide; mercury; microwave treatment; molybdenum disulfide; nanogold; nanosheets; oxidation; peroxidase; river water; surface area; tap water; Yellow River
Abstract:
... A colorimetric assay is described for sensitive determination of Hg²⁺ ions based on the MoS₂-Au composites as peroxidase mimetics, which are synthesized by microwave-assisted solvothermal method. The addition of Hg²⁺ stimulates their peroxidase-like activity, along with lower Michaelis constant toward the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) with H₂O₂, allowing the composites for dire ...
DOI:
10.1016/j.jcis.2018.11.069

52. Colossal permittivity in ceramics of TiO₂ Co-doped with niobium and trivalent cation

Author:
Xiaojing Cheng; Zhenwei Li; Jiagang Wu
Source:
Journal of materials chemistry A 2015 v.3 no.11 pp. 5805-5810
ISSN:
2050-7496
Subject:
X-ray photoelectron spectroscopy; aluminum; bismuth; cations; ceramics; chemistry; cobalt; dielectric properties; niobium; temperature; titanium dioxide
Abstract:
... The appearance of colossal permittivity (CP) materials broadens the choice of materials for energy-storage applications. Here we report colossal permittivity in ceramics of TiO₂ co-doped with niobium and trivalent cation {i.e., (A₀.₅Nb₀.₅)ₓTi₁₋ₓO₂, A = Bi, Pr, Dy, Sm, Gd, Yb, Ga, Al or Sc}, in particular in the (Bi₀.₅Nb₀.₅)ₓTi₁₋ₓO₂ ceramic system that was selected as a candidate material. A very l ...
DOI:
10.1039/c5ta00141b

53. Combination cation substitution tuning of yellow-orange emitting phosphor Mg₂Y₂Al₂Si₂O₁₂:Ce³⁺

Author:
Zaifa Pan; Yu Xu; Qingsong Hu; Weiqiang Li; Huan Zhou; Yifan Zheng
Source:
RSC advances 2015 v.5 no.13 pp. 9489-9496
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; aluminum; blue light; cations; cerium; color; elemental composition; magnesium; scanning electron microscopy; silicates; transmission electron microscopy; yttrium
Abstract:
... Cation substitution is a valuable approach to tune the crystal field splitting of garnet phosphor and hence enhances the red shift of the Ce³⁺ emission. A novel aluminate silicate garnet phosphor Mg₂Y₂Al₂Si₂O₁₂:Ce³⁺ is designed with the aim of creating a large distortion of the dodecahedron and an external pressure from the large octahedron through the combination of the substitution of both dodec ...
DOI:
10.1039/c4ra14425b

54. Combined effects of hole doping and off-stoichiometry on the structures, transport, and magnetic properties of Sr₍₂₋y₎NayFe₍₁₋ₓ₎Mo₍₁₊ₓ₎O₆ (x = 0/5x = y; y = 0, 0.05, 0.1, 0.15, 0.2, and 0.3)

Author:
Jin-Feng Wang; Yan-Ming Zhang
Source:
RSC advances 2017 v.7 no.42 pp. 26185-26193
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; cations; ceramics; iron; magnetic properties; magnetism; molybdenum; sodium; temperature
Abstract:
... A series of double perovskite, Sr₍₂₋y₎NayFeMoO₆ (y = 0, 0.05, 0.1, 0.15, 0.2, and 0.3) and Sr₍₂₋y₎NayFe₍₁₋ₓ₎Mo₍₁₊ₓ₎O₆ (5x = y; y = 0.05, 0.1, 0.15, 0.2, and 0.3), ceramics were synthesized via a solid-state reaction. The influences of the doped Na (y) and off-stoichiometry (excess Mo: x) content on the structure, magnetization, chemical states, resistivity, magnetoresistance (MR), and the Curie te ...
DOI:
10.1039/c7ra02919e

55. Comparative Intrinsic Thermal and Photochemical Stability of Sn(II) Complex Halides as Next-Generation Materials for Lead-Free Perovskite Solar Cells

Author:
Azat F. Akbulatov; Sergey A. Tsarev; Moneim Elshobaki; Sergey Yu. Luchkin; Ivan S. Zhidkov; Ernst Z. Kurmaev; Sergey M. Aldoshin; Keith J. Stevenson; Pavel A. Troshin
Source:
Journal of physical chemistry 2019 v.123 no.44 pp. 26862-26869
ISSN:
1932-7455
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; additives; annealing; atomic force microscopy; bromides; cations; cesium; chemical degradation; encapsulation; films (materials); heat; iodides; oxygen; photochemistry; physical chemistry; soaking; solar cells; solar collectors; temperature; tin
Abstract:
... Here, we present a systematic study of the thermal and photochemical degradation pathways for a series of complex tin-based halides ASnX₃ (X = I, Br) with organic (CH₃NH₃⁺, H₂NCHNH₂⁺) and inorganic (Cs⁺) univalent A-site cations. Thin films of tin-based perovskites were exposed to continuous light soaking and/or thermal annealing in the dark under an inert atmosphere, which simulate pragmatic anox ...
DOI:
10.1021/acs.jpcc.9b09200

56. Competition and enhancement effect in coremoval of atenolol and copper by an easily regenerative magnetic cation exchange resin

Author:
Qimeng Li; Zheng Wang; Qiang Li; Chendong Shuang; Qing Zhou; Aimin Li; Canzhu Gao
Source:
Chemosphere 2017 v.179 pp. 1-9
ISSN:
0045-6535
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorbents; adsorption; aqueous solutions; cation exchange; cations; copper; hydrochloric acid; models; sorption isotherms
Abstract:
... This paper aimed to investigate the removal of combined Cu²⁺ and atenolol (ATL) in aqueous solution by using a newly synthesized magnetic cation exchange resin (MCER) as the adsorbent. The MCER exhibited efficient removal performance in sole, binary, pre-loading and saline systems. The adsorption kinetics of Cu²⁺ and ATL fitted both pseudo-first-order and pseudo-second order model, while better de ...
DOI:
10.1016/j.chemosphere.2017.03.005

57. Competitive adsorption desulfurization performance over K – Doped NiY zeolite

Author:
Haizheng Li; Xiaona Han; Haokai Huang; Yuxian Wang; Liang Zhao; Liyuan Cao; Baojian Shen; Jinsen Gao; Chunming Xu
Source:
Journal of colloid and interface science 2016 v.483 pp. 102-108
ISSN:
0021-9797
Subject:
Bronsted acids; Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; alkenes; cations; desulfurization; gasoline; models; nickel; scanning electron microscopes; scanning electron microscopy; thiophene; toluene; zeolites
Abstract:
... NiY and KNiY were successfully prepared by impregnation method and characterized by X-ray diffraction (XRD), N2 sorption (BET), scanning electron microscope (SEM), infrared spectrum (IR) and X-ray Photoelectron Spectroscopy (XPS). The competitive adsorption mechanisms of adsorbents were studied by in situ FTIR to explain different desulfurization performance which was evaluated in a miniature fixe ...
DOI:
10.1016/j.jcis.2016.08.024

58. Competitive adsorption of heavy metals by anaerobic ammonium-oxidizing (anammox) consortia

Author:
Yuxia Liu; Jun Han; Sichen Dong; Yanwei Li; Sitong Liu; Qingxiang Zhou; Chunmao Chen; Daniel S. Alessi; Kurt O. Konhauser; Huazhang Zhao
Source:
Chemosphere 2020 v.258 pp. 127289
ISSN:
0045-6535
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorption; anaerobic ammonium oxidation; binding sites; cations; density functional theory; energy; heavy metals; ion exchange; ligands; metal ions; models; wastewater; wastewater treatment
Abstract:
... Anammox-based processes and microbial consortia have drawn extensive attention for their use in high-efficiency wastewater treatment technologies. Metals substantially affect the activity of anammox consortia and the quality of wastewater treatment plant effluent. Here, we explored the role of anammox consortia in terms of metals complexation in both single and multi-metal systems. Adsorption edge ...
DOI:
10.1016/j.chemosphere.2020.127289

59. Complete Oxidation of Methane on NiO Nanoclusters Supported on CeO2 Nanorods through Synergistic Effect

Author:
Xiaoyan Zhang; Stephen D. House; Yu Tang; Luan Nguyen; Yuting Li; Adedamola A. Opalade; Judith C. Yang; Zaicheng Sun; Franklin Feng Tao
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.5 pp. 6467-6477
ISSN:
2168-0485
Subject:
X-ray photoelectron spectroscopy; catalysts; catalytic activity; cations; ceric oxide; combustion; hydrogen; liquid petroleum gas; methane; nanocomposites; nanoparticles; nanorods; natural gas; nickel; nickel oxide; oxygen; synergism; temperature; transmission electron microscopy
Abstract:
... Catalytic complete oxidation of CH₄ at relatively low temperatures is significant for removing unburned CH₄ from the exhaust of combustion engines fueled with natural gas or liquefied petroleum gas. Here a nanocomposite catalyst (NiO/CeO₂) consisting of CeO₂ nanorods and supported NiO nanoclusters was prepared by a two-step wet-chemistry method. This nanocomposite catalyst exhibits high catalytic ...
DOI:
10.1021/acssuschemeng.8b00234

60. Composition in the Interface between Clay Mineral Surfaces and Divalent Cation Electrolytes

Author:
S. Jelavić; A. R. Nielsen; S. L. S. Stipp; N. Bovet
Source:
Langmuir 2018 v.34 no.24 pp. 7011-7020
ISSN:
1520-5827
Subject:
Gibbs free energy; X-ray photoelectron spectroscopy; adsorption; calcium chloride; cations; clay; crystallization; drying; freezing; illite; ionic strength; liquids; magnesium chloride; molecular models; nitrogen; oils; salinity; temperature
Abstract:
... The interfacial free energy of a solid, which determines its adsorption properties, depends on interactions between the surface and the fluid. A change in surface composition can completely change the behavior of the solid. Decades of work have explored adsorption and its effects at solid–fluid interfaces from the macroscopic perspective and using molecular modeling, so the concept of the electric ...
DOI:
10.1021/acs.langmuir.8b00370

61. Comprehensive study on PVDF-HFP/BMImBF4/AgBF4 membranes for propylene purification

Author:
Raúl Zarca; Antoniel Carlos C. Campos; Alfredo Ortiz; Daniel Gorri; Inmaculada Ortiz
Source:
Journal of membrane science 2019 v.572 pp. 255-261
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray photoelectron spectroscopy; artificial membranes; catalytic cracking; cations; dissociation; industrial applications; olefin; permeability; polymers; propylene; relative humidity; silver; thermogravimetry; water uptake
Abstract:
... In this work, a comprehensive analysis of PVDF-HFP/BMImBF4/AgBF4 facilitated transport membranes for olefin/paraffin separation is presented. Previous works of our research group have reported high flux and propylene selectivity under dry conditions and using synthetic gas mixtures, highlighting the promising potential of these membranes for industrial applications. This work advances in the under ...
DOI:
10.1016/j.memsci.2018.11.023

62. Contribution of a Tribo-Induced Silica Layer to Macroscale Superlubricity of Hydrated Ions

Author:
Tianyi Han; Chenhui Zhang; Xinchun Chen; Jinjin Li; Weiqi Wang; Jianbin Luo
Source:
Journal of physical chemistry 2019 v.123 no.33 pp. 20270-20277
ISSN:
1932-7455
Subject:
X-ray photoelectron spectroscopy; atomic force microscopy; cations; ceramics; friction; hydrophilicity; lithium; lubrication; mechanical properties; mica; modulus of elasticity; physical chemistry; potassium; silica; silicon nitride; sodium; surface roughness; transmission electron microscopy; zeta potential
Abstract:
... Hydrated ions (Li⁺, Na⁺, and K⁺) are capable of achieving macroscale superlubricity under high contact pressures and high normal loads, which mainly originates from the hydration effect and tribochemical reaction related to the in situ formation of an interfacial nanostructured shear layer, namely, a silica-like tribolayer. Nevertheless, the mechanisms governing this macroscale superlubricity espe ...
DOI:
10.1021/acs.jpcc.9b03762

63. Controlled synthesis of cobalt carbonate/graphene composites with excellent supercapacitive performance and pseudocapacitive characteristics

Author:
Mohammad Akbari Garakani; Sara Abouali; Biao Zhang; Zheng-Long Xu; Jiaqiang Huang; Jian-Qiu Huang; Elham Kamali Heidari; Jang-Kyo Kim
Source:
Journal of materials chemistry A 2015 v.3 no.34 pp. 17827-17836
ISSN:
2050-7496
Subject:
X-ray photoelectron spectroscopy; aerogels; capacitance; carbonates; cations; cobalt; electrochemistry; electrodes; graphene; hot water treatment; microstructure; redox reactions
Abstract:
... Cobalt carbonate hydroxide/graphene aerogel and cobalt carbonate/graphene aerogel (CCH/GA and CC/GA) composites are synthesized as supercapacitor electrodes via a one-pot hydrothermal method. Optimized processing conditions are established by controlling the composite composition and microstructure, and their influence on the capacitance performance of the electrodes is identified. A remarkable sp ...
DOI:
10.1039/c5ta02916c

64. Controlling Ni²⁺ from the Surface to the Bulk by a New Cathode Electrolyte Interphase Formation on a Ni-Rich Layered Cathode in High-Safe and High-Energy-Density Lithium-Ion Batteries

Author:
Nan-Hung Yeh; Fu-Ming Wang; Chusnul Khotimah; Xing-Chun Wang; Yi-Wen Lin; Shih-Chang Chang; Chun-Chuan Hsu; Yung-Jen Chang; Lester Tiong; Chia-Hao Liu; Ying-Rui Lu; Yen-Fa Liao; Chung-Kai Chang; Shu-Chih Haw; Chih-Wen Pao; Jeng-Lung Chen; Chi-Liang Chen; Jyh-Fu Lee; Ting-Shan Chan; Hwo-Shuenn Sheu; Jin-Ming Chen; Alagar Ramar; Chia-Hung Su
Source:
ACS applied materials & interfaces 2021 v.13 no.6 pp. 7355-7369
ISSN:
1944-8252
Subject:
X-ray absorption spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; cathodes; cations; electric vehicles; energy; energy density; lithium; temperature; transmission electron microscopy
Abstract:
... Ni-rich high-energy-density lithium ion batteries pose great risks to safety due to internal short circuits and overcharging; they also have poor performance because of cation mixing and disordering problems. For Ni-rich layered cathodes, these factors cause gas evolution, the formation of side products, and life cycle decay. In this study, a new cathode electrolyte interphase (CEI) for Ni²⁺ self- ...
DOI:
10.1021/acsami.0c22295

65. Copper removal using bio-inspired polydopamine coated natural zeolites

Author:
Yang Yu; Joseph G. Shapter; Rachel Popelka-Filcoff; John W. Bennett; Amanda V. Ellis
Source:
Journal of hazardous materials 2014 v.273 pp. 174-182
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorbents; adsorption; aqueous solutions; atomic absorption spectrometry; cations; copper; models; neutron activation analysis; pH; powders; sorption isotherms; thermogravimetry; zeolites
Abstract:
... Herein, for the first time, natural clinoptilolite-rich zeolite powders modified with a bio-inspired adhesive, polydopamine (PDA), have been systematically studied as an adsorbent for copper cations (Cu(II)) from aqueous solution. Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA) revealed successful grafting of PDA onto the ...
DOI:
10.1016/j.jhazmat.2014.03.048

66. Copper-Doped Titanium Dioxide Bronze Nanowires with Superior High Rate Capability for Lithium Ion Batteries

Author:
Zhang Yongquan; Meng Yuan; Zhu Kai; Qiu Hailong; Ju Yanming; Gao Yu; Du Fei; Zou Bo; Chen Gang; Wei Yingjin
Source:
ACS Applied Materials & Interfaces 2016 v.8 no.12 pp. 7957-7965
ISSN:
1944-8252
Subject:
X-ray photoelectron spectroscopy; cations; copper; dielectric spectroscopy; electrochemistry; lithium batteries; microwave treatment; nanowires; surface area; titanium dioxide
Abstract:
... Pristine and Cu-doped TiO₂–B nanowires are synthesized by the microwave assisted hydrothermal method. The doped oxide exhibits a highly porous structure with a specific surface area of 160.7 m² g–¹. As evidenced by X-ray photoelectron spectroscopy and X-ray energy dispersive spectroscopy, around 2.0 atom % Cu²⁺ cations are introduced into TiO₂–B, which leads to not only a slightly expanded lattice ...
DOI:
10.1021/acsami.5b10766

67. Copper-based metal–organic framework nanoparticles for sensitive fluorescence detection of ferric ions

Author:
Fanglin Ming; Jingzhou Hou; Danqun Huo; Jun Zhou; Mei Yang; Caihong Shen; Suyi Zhang; Changjun Hou
Source:
Analytical methods 2019 v.11 no.34 pp. 4382-4389
ISSN:
1759-9679
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; anions; aqueous solutions; atomic absorption spectrometry; cations; coordination compounds; copper; detection limit; environmental monitoring; fluorescence; iron; nanoparticles
Abstract:
... A luminescent amino-functionalized metal–organic framework (Cu–MOFs) was synthesized from 2-aminoterephthalic acid and Cu(ii) ions by a solvothermal method. Cu–MOFs displayed blue fluorescence with a peak at 430 nm under 330 nm excitation. Its structure was characterized by FTIR, TEM, XRD, and XPS. The fluorescence of the Cu–MOFs was quenched by Fe³⁺ in aqueous solutions. The limit of detection wa ...
DOI:
10.1039/c9ay01093a

68. Core Levels, Band Alignments, and Valence-Band States in CuSbS2 for Solar Cell Applications

Author:
Whittles Thomas J.; Veal Tim D.; Savory Christopher N.; Welch Adam W.; de Souza Lucas Francisco Willian; Gibbon James T.; Birkett Max; Potter Richard J.; Scanlon David O.; Zakutayev Andriy; Dhanak Vinod R.
Source:
ACS applied materials & interfaces 2017 v.9 no.48 pp. 41916-41926
ISSN:
1944-8252
Subject:
X-ray photoelectron spectroscopy; antimony; cations; electric power; electrons; gallium; indium; ionization; materials science; optical properties; photovoltaic cells
Abstract:
... The earth-abundant material CuSbS₂ (CAS) has shown good optical properties as a photovoltaic solar absorber material, but has seen relatively poor solar cell performance. To investigate the reason for this anomaly, the core levels of the constituent elements, surface contaminants, ionization potential, and valence-band spectra are studied by X-ray photoemission spectroscopy. The ionization potenti ...
DOI:
10.1021/acsami.7b14208

69. Core–shell structure PEO/CS nanofibers based on electric field induced phase separation via electrospinning and its application

Author:
Guangkai Chen; Dawei Fang; Kemin Wang; Jun Nie; Guiping Ma
Source:
Journal of polymer science 2015 v.53 no.19 pp. 2298-2311
ISSN:
0887-624X
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; acetic acid; amino acids; cations; chitosan; drugs; electric field; electrical properties; electrostatic interactions; molecular weight; nanofibers; polymers; scanning electron microscopy; separation; transmission electron microscopy
Abstract:
... Core–shell structured PEO‐chitosan nanofibers have been produced from electric field inducing phase separation. Chitosan, a positive charged polymer, was dissolved in 50 wt % aqueous acetic acid and the amino group on polycation would protonize, which would endow chitosan electrical properties. Chitosan molecules would move along the direction of the electric field under the electrostatic force an ...
DOI:
10.1002/pola.27702

70. Corrosion behavior and cytocompatibility of a Co–Cr and two Ni–Cr dental alloys before and after the pretreatment with a biological saline solution

Author:
Pan-pan Ming; Shui-yi Shao; Jing Qiu; Ying-juan Yu; Jia-xi Chen; Jie Yang; Wen-qing Zhu; Ming Li; Chun-bo Tang
Source:
RSC advances 2017 v.7 no.10 pp. 5843-5852
ISSN:
2046-2069
Subject:
X-ray photoelectron spectroscopy; alloys; beryllium; bovine serum albumin; cations; cell proliferation; chromium; cobalt; corrosion; electrochemistry; elemental composition; fibroblasts; in vitro studies; metal ions; molybdenum; nickel; oxygen; saliva; sodium chloride
Abstract:
... Objectives. The aim of this study was to evaluate the corrosion behavior and cytocompatibility of a Co–Cr and two Ni–Cr dental alloys before and after the pretreatment with a biological saline solution. Methods. A commercial cobalt–chromium (Co–Cr) and two nickel–chromium (Ni–Cr) dental alloys [beryllium (Be)-free and Be-containing] were selected and pretreated with a biological saline solution co ...
DOI:
10.1039/c6ra26727k

71. Co‐catalytic effect of Al‐Cr pillared montmorillonite as a new SCR catalytic support

Author:
Dingsheng Chen; Chaoping Cen; Jinxi Feng; Chunyang Yao; Waiqing Li; Shuanghong Tian; Ya Xiong
Source:
Journal of chemical technology and biotechnology 2016 v.91 no.11 pp. 2842-2851
ISSN:
0268-2575
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; aluminum; catalysts; catalytic activity; cations; cerium; clay; manganese; montmorillonite; nitrogen; temperature; thermal stability
Abstract:
... BACKGROUND: It is of great interest to use pillared clay (PILC) as a cheap support for a selective catalytic reduction (SCR) catalyst. Al‐Cr pillared clay (AlCr‐PILC) has high thermal stability due to the introduction of polycations of Al. As a support, AlCr‐PILC may show a co‐catalytic effect in SCR processes because chromium oxide itself is an active SCR catalyst. The aim of this work is to inve ...
DOI:
10.1002/jctb.4899

72. Critical Raw Material-Free Catalysts and Electrocatalysts: Complementary Strategies to Activate Economic, Robust, and Ecofriendly SrTiO₃

Author:
Giovanni Carollo; Alberto Garbujo; Fabrice Mauvy; Antonella Glisenti
Source:
Energy & fuels 2020 v.34 no.9 pp. 11438-11448
ISSN:
1520-5029
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; anodes; barium; biogas; cations; desorption; durability; energy; energy-dispersive X-ray analysis; fuel cells; methane; molybdenum; nickel; oxidation
Abstract:
... In this contribution, new SrTiO₃-based materials have been developed and their catalytic and electrocatalytic properties have been tuned by cation insertion, nanocomposition, and infiltration. The aim is to develop highly functional materials within a critical raw material-free approach with a particular aim toward durability and stability [under operating conditions of solid oxide fuel cell (SOFC ...
DOI:
10.1021/acs.energyfuels.0c01678

73. Cu(II) Galvanic Reduction and Deposition onto Iron Nano- and Microparticles: Resulting Morphologies and Growth Mechanisms

Author:
Masnadi Mitra; Yao Nan; Braidy Nadi; Moores Audrey
Source:
Langmuir 2015 v.31 no.2 pp. 789-798
ISSN:
1520-5827
Subject:
X-ray photoelectron spectroscopy; aqueous solutions; catalysts; cations; copper; energy; energy-dispersive X-ray analysis; heavy metals; iron; metal ions; microparticles; nanoparticles; oxidation; remediation; scanning electron microscopy; transmission electron microscopy; wastewater
Abstract:
... The galvanic reduction of heavy metal ions by zerovalent iron nanoparticles is a key process occurring extensively in wastewater remediation, as well as for the synthesis of materials, including catalysts. In this work, we studied the growth of copper species on nano- and micrometer-sized iron particles and investigated the morphologies of the resulting structures. The growth proceeds via sacrific ...
DOI:
10.1021/la503598b

74. Cu(II) adsorption on 2-thiouracil-modified Luffa Cylindrica biochar fibres from artificial and real samples, and competition reactions with U(VI)

Author:
Ioanna Liatsou; Ioannis Pashalidis; Carsten Dosche
Source:
Journal of hazardous materials 2019 pp. -
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; Luffa aegyptiaca; X-ray photoelectron spectroscopy; acid mine drainage; adsorbents; adsorption; biochar; cations; copper; desorption; nitric acid; pH; spectral analysis; uranium
Abstract:
... The adsorption of Cu(II) ions by biochar fibres prior and after modification with 2-thiouracil on real and artificial samples has been studied by batch-type adsorption experiments, FTIR and XPS spectroscopy and competition reactions using U(VI) ions as competitor cations. The experimental data of the artificial samples clearly show that the modified material presents extraordinary higher affinity ...
DOI:
10.1016/j.jhazmat.2019.120950

75. DFT + U and Low-Temperature XPS Studies of Fe-Depleted Chalcopyrite (CuFeS₂) Surfaces: A Focus on Polysulfide Species

Author:
Vladimir Nasluzov; Aleksey Shor; Alexander Romanchenko; Yevgeny Tomashevich; Yuri Mikhlin
Source:
Journal of physical chemistry 2019 v.123 no.34 pp. 21031-21041
ISSN:
1932-7455
Subject:
X-ray photoelectron spectroscopy; ambient temperature; anions; aqueous solutions; cations; copper; density functional theory; disulfides; energy; iron; leaching; oxidation; physical chemistry
Abstract:
... The initial release of cations upon oxidation of metal sulfides commonly produces a metal-deficient surface and undersurface layers, which should greatly affect the properties of materials but are still poorly understood. We employed density functional theory + U simulation of chalcopyrite (012) and (110) surfaces with up to a half of surface iron removed together with X-ray photoelectron spectros ...
DOI:
10.1021/acs.jpcc.9b06127

76. Dechlorination of Reformate via Chemical Adsorption Reactions by Ce–Y Zeolite

Author:
Ge Xianglin; Shi Li; Wang Xin
Source:
Industrial & Engineering Chemistry Research 2014 v.53 no.15 pp. 6351-6357
ISSN:
1520-5045
Subject:
Bronsted acids; Lewis acids; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; adverse effects; ammonia; cations; cerium; chlorides; dechlorination; desorption; engineering; pyridines; temperature; thermogravimetry; zeolites
Abstract:
... In this research, dechlorination of reformate by the catalytic reforming process was investigated over ion-exchanged Y zeolites. Effects of cations, calcination, and reaction temperature on the removal of chloride compounds have been evaluated by performing dynamic tests. The adsorbents were characterized by X-ray diffraction, X-ray fluorescence analysis, thermogravimetric analysis, NH₃ temperatur ...
DOI:
10.1021/ie500314a

77. Decomposition of Ionic Liquids at Lithium Interfaces. 1. Ab Initio Molecular Dynamics Simulations

Author:
Handan Yildirim; Justin B. Haskins; Charles W. Bauschlicher; John W. Lawson
Source:
Journal of physical chemistry 2017 v.121 no.51 pp. 28214-28234
ISSN:
1932-7455
Subject:
X-ray photoelectron spectroscopy; ambient temperature; anions; batteries; cations; chemical bonding; cleavage (chemistry); density functional theory; gases; ionic liquids; lithium; molecular dynamics; simulation models; sulfur dioxide; thermodynamics
Abstract:
... This work is Part 1 in a two part series that investigates the interfacial decomposition chemistry of [pyr14][TFSI] and [EMIM][BF₄] ionic liquids (IL) at Li metal interfaces. Here, the decomposition is probed primarily through ab initio molecular dynamics (AIMD) simulations. For single ion pairs adsorbed on a Li(100) surface, hybrid ion states are found to emerge about the Fermi level. Interesting ...
DOI:
10.1021/acs.jpcc.7b09657

78. Defective by design: vanadium-substituted iron oxide nanoarchitectures as cation-insertion hosts for electrochemical charge storage

Author:
Christopher N. Chervin; Jesse S. Ko; Bryan W. Miller; Lisa Dudek; Azzam N. Mansour; Martin D. Donakowski; Todd Brintlinger; Pavel Gogotsi; Soma Chattopadhyay; Tomohiro Shibata; Joseph F. Parker; Benjamin P. Hahn; Debra R. Rolison; Jeffrey W. Long
Source:
Journal of materials chemistry A 2015 v.3 no.22 pp. 12059-12068
ISSN:
2050-7496
Subject:
X-radiation; X-ray absorption spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; aerogels; argon (noble gases); byproducts; cations; crystal structure; crystallization; electrochemistry; heat treatment; hosts; iron; iron oxides; lithium; nanocrystals; oxidation; oxygen; partial pressure; porous media; sol-gel processing; surface area; vanadium
Abstract:
... Vanadium-substituted iron oxide aerogels (2 : 1 Fe : V ratio; VFe₂Oₓ) are synthesized using an epoxide-initiated sol–gel method to form high surface-area, mesoporous materials in which the degree of crystallinity and concentration of defects are tuned via thermal treatments under controlled atmospheres. Thermal processing of the X-ray amorphous, as-synthesized VFe₂Oₓ aerogels at 300 °C under O₂-ri ...
DOI:
10.1039/c5ta01507c

79. Degradation Mechanism of Silver Metal Deposited on Lead Halide Perovskites

Author:
Sebastian Svanström; T. Jesper Jacobsson; Gerrit Boschloo; Erik M. J. Johansson; Håkan Rensmo; Ute B. Cappel
Source:
ACS applied materials & interfaces 2020 v.12 no.6 pp. 7212-7221
ISSN:
1944-8252
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; cations; cesium; electrodes; gases; lead; models; scanning electron microscopy; silver; solar cells; ultraviolet-visible spectroscopy
Abstract:
... Lead halide perovskite solar cells have significantly increased in both efficiency and stability over the last decade. An important aspect of their long-term stability is the reaction between the perovskite and other materials in the solar cell. This includes the contact materials and their degradation if they can potentially come into contact through, e.g., pinholes or material diffusion and migr ...
DOI:
10.1021/acsami.9b20315

80. Degradation mechanisms of lithium-rich nickel manganese cobalt oxide cathode thin films

Author:
Loïc Baggetto; Debasish Mohanty; Roberta A. Meisner; Craig A. Bridges; Claus Daniel; David L. Wood III; Nancy J. Dudney; Gabriel M. Veith
Source:
RSC advances 2014 v.4 no.45 pp. 23364-23371
ISSN:
2046-2069
Subject:
X-ray photoelectron spectroscopy; cathodes; cations; cobalt; cobalt oxide; electrochemistry; films (materials); lithium batteries; manganese; nickel; oxygen
Abstract:
... This paper reports a method to prepare Li-rich NMC (Li₁.₂Mn₀.₅₅Ni₀.₁₅Co₀.₁O₂) thin film cathodes for Li-ion batteries using RF magnetron sputtering and post-annealing in O₂. Thin film cathodes with high reversible capacities (260 mA h g⁻¹) and potential profiles similar to those of the powder material have been obtained. Structural and electrochemical studies show that the grown materials consist ...
DOI:
10.1039/c4ra03674c

81. Degradation of benzene derivatives in the CuMgFe-LDO/persulfate system: The role of the interaction between the catalyst and target pollutants

Author:
Yun Chen; Da Ouyang; Wenying Zhang; Jingchun Yan; Linbo Qian; Lu Han; Mengfang Chen
Source:
Journal of environmental sciences (China) 2020 v.90 pp. 87-97
ISSN:
1001-0742
Subject:
4-chlorophenol; X-ray photoelectron spectroscopy; benzene; catalysts; catalytic activity; cations; copper; electron paramagnetic resonance spectroscopy; free radicals; moieties; pollutants; sulfates
Abstract:
... A novel insight on the role of interactions between target pollutants and the catalyst in the copper-containing layered double oxide (LDO)-catalyzed persulfate (PS) system was elucidated in the present study. 4-Chlorophenol (4-CP), as a representative benzene derivative with a hydroxyl group, was completely removed within 5 min, which was much faster than the reaction of monochlorobenzene (MCB) wi ...
DOI:
10.1016/j.jes.2019.11.014

82. Depassivation of Aged Fe0 by Divalent Cations: Correlation between Contaminant Degradation and Surface Complexation Constants

Author:
Liu Tongxu; Li Xiaomin; Waite T. David
Source:
Environmental Science & Technology 2014 v.48 no.24 pp. 14564-14571
ISSN:
1520-5851
Subject:
X-ray photoelectron spectroscopy; barium; calcium; cations; coatings; cobalt; copper; dechlorination; electrons; ferric oxide; iron; lead; magnesium; magnetite; manganese; nickel; pH; strontium; thermodynamics; trichloroethylene; zinc
Abstract:
... The dechlorination of trichloroethylene (TCE) by aged Fe⁰ in the presence of a series of divalent cations was investigated with the result that while no significant degradation of TCE was observed in Milli-Q water or in solutions of Ba²⁺, Sr²⁺, or Ca²⁺, very effective TCE removal was observed in solutions containing Mg²⁺, Mn²⁺, Co²⁺, Fe²⁺, Ni²⁺, Zn²⁺, Cu²⁺, or Pb²⁺. The rate constants of TCE remov ...
DOI:
10.1021/es503777a

83. Depth profiling X-ray photoelectron spectroscopy and atomic force microscopy of Cd(ii)- and Pb(ii)-selective electrodes based on nano metal sulfides

Author:
Abdulhakeem A. Ajadi; Nadia M. Shuaib; Adel F. Shoukry
Source:
RSC advances 2018 v.8 no.7 pp. 3574-3581
ISSN:
2046-2069
Subject:
X-ray photoelectron spectroscopy; active ingredients; atomic force microscopy; cadmium; calibration; cations; deformation; gels; ionophores; leaching; lead; longevity; nanoparticles; pH; specific ion electrodes; sulfides
Abstract:
... This research involved constructing and studying plastic membrane Cd(ii)- and Pb(ii)-ion selective electrodes of the coated wire type based on nanoparticles of CdS and PbS as ionophores, respectively. The electrodes exhibited average linear concentration ranges of 1.0 × 10⁻⁶ to 1.0 × 10⁻² and 9.6 × 10⁻⁷ to 1.0 × 10⁻² M, average detection limits of 8.6 × 10⁻⁷ and 5.8 × 10⁻⁷ M, pH ranges of 2.2–5.8 ...
DOI:
10.1039/c7ra13168b

84. Design of anion species/strength responsive membranes via in-situ cross-linked copolymerization of ionic liquids

Author:
Xiang Zhang; Jukai Zhou; Ran Wei; Weifeng Zhao; Shudong Sun; Changsheng Zhao
Source:
Journal of membrane science 2017 v.535 pp. 158-167
ISSN:
0376-7388
Subject:
X-ray photoelectron spectroscopy; anions; aqueous solutions; artificial membranes; cations; chemical composition; copolymerization; crosslinking; ion exchange; ionic liquids; saline water; scanning electron microscopes; sodium chloride
Abstract:
... A series of poly(ionic liquid)s (PILs) modified polyethersulfone membranes were fabricated via an in-situ cross-linking copolymerization method. Due to the positive charge and ion-exchange properties of the PILs, the membranes showed anion species and strength responsive behaviors. The morphologies and chemical compositions of the membranes were characterized by scanning electron microscope and X- ...
DOI:
10.1016/j.memsci.2017.04.044

85. Design of hemocompatible and antifouling PET sheets with synergistic zwitterionic surfaces

Author:
Yanfang Wang; Jian Shen; Jiang Yuan
Source:
Journal of colloid and interface science 2016 v.480 pp. 205-217
ISSN:
0021-9797
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adhesion; adsorption; atomic force microscopy; biocompatibility; blood platelets; cations; cell adhesion; electron transfer; fibroblasts; microorganisms; polycarboxybetaines; polymerization; polymers; zwitterions
Abstract:
... Zwitterionic surface has been proven to be a good candidate for improving hemocompatible and antibiofouling properties. However, it can only passively repel the adsorption of microbes and is unable to kill the adherent or trapped microbes. The purpose of our study is to develop a facile method based on synergy “repel and kill” strategy and prepare dual antifouling and antibacterial surface. Herein ...
DOI:
10.1016/j.jcis.2016.07.022

86. Design of highly efficient Mo and W-promoted SnO₂ solid acids for heterogeneous catalysis: acetalization of bio-glycerol

Author:
Baithy Mallesham; Putla Sudarsanam; Gangadhara Raju; Benjaram M. Reddy
Source:
Green chemistry 2013 v.15 no.2 pp. 478-489
ISSN:
1463-9270
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; acetone; acids; ambient temperature; catalysts; catalytic activity; cations; crystallites; furfural; glycerol; green chemistry; molybdenum; nanocrystals; oxygen; porosity; pyridines; solid solutions; surface area; tin dioxide; tungsten oxide; value-added products
Abstract:
... Development of highly promising solid acids is one of the key technologies to meet the essential challenges of economical and environmental concerns. Thus, novel molybdenum and tungsten promoted SnO₂ solid acids (wet-impregnation) and pure SnO₂ (fusion method) were prepared. The synthesized catalysts were systematically analyzed using various techniques, namely, XRD, BET surface area, pore size di ...
DOI:
10.1039/c2gc36152c

87. Designing strontium titanate-based thermoelectrics: insight into defect chemistry mechanisms

Author:
Andrei V. Kovalevsky; Myriam H. Aguirre; Sascha Populoh; Sonia G. Patrício; Nuno M. Ferreira; Sergey M. Mikhalev; Duncan P. Fagg; Anke Weidenkaff; Jorge R. Frade
Source:
Journal of materials chemistry A 2017 v.5 no.8 pp. 3909-3922
ISSN:
2050-7496
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; cations; energy-dispersive X-ray analysis; heat transfer; models; oxygen; scanning electron microscopy; strontium; synergism; thermal conductivity; thermal stability; thermogravimetry; transmission electron microscopy
Abstract:
... Driven by a need to develop low-cost and thermally stable materials for thermoelectric applications, donor-substituted strontium titanate is considered as a promising alternative to traditional thermoelectrics. The complex defect chemistry of SrTiO₃-based materials imposes various limitations on identifying the relevant effects exerted on the electronic band structure and heat transfer, being a su ...
DOI:
10.1039/c6ta09860f

88. Determination of adsorption characteristics of synthetic NaX nanoparticles

Author:
Yilmaz Yurekli
Source:
Journal of hazardous materials 2019 v.378 pp. 120743
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; cations; copper; copper nanoparticles; desorption; hot water treatment; ion exchange; lead; metal ions; models; nickel; prediction; sodium chloride; sorption isotherms; wastewater; zeolites
Abstract:
... Zeolite nanoparticles were synthesized by means of a hydrothermal method and the sorption performances were tested in batch experiments using single and binary components of Pb2+, Ni2+and Cu2+ synthetic solutions. Fast adsorption was observed and the majority of sorption occurred within the first 5 min for each case of metal cations. Percentage metal removal increased with the adsorbent dosage and ...
DOI:
10.1016/j.jhazmat.2019.120743

89. Direct Growth of Triple Cation Metal–Organic Framework on a Metal Substrate for Electrochemical Energy Storage

Author:
Nurul Khairiyyah Mohd Zain; Bincy Lathakumary Vijayan; Izan Izwan Misnon; Santanu Das; Chelladurai Karuppiah; Chun-Chen Yang; Mashitah Mohd Yusoff; Rajan Jose
Source:
Industrial & engineering chemistry process design and development 2018 v.58 no.2 pp. 665-674
ISSN:
1520-5045
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; cations; cobalt; coordination polymers; copper; dielectric spectroscopy; electrochemistry; electrodes; energy; hydrogen; nickel; potassium hydroxide; process design; redox reactions; scanning electron microscopy; surface area
Abstract:
... Metal–organic frameworks (MOFs) offer a robust structure with high surface area together with open metal center sites which easily undergo the reversible redox reaction without damaging the framework; therefore, they are actively considered as a medium for electrochemical energy storage. This article demonstrates the superiority of triple cation metal-terephthalate as charge storage electrodes ove ...
DOI:
10.1021/acs.iecr.8b03898

90. Direct synthesis of 1T-phase MoS₂ nanosheets with abundant sulfur-vacancies through (CH₃)₄N⁺ cation-intercalation for the hydrogen evolution reaction

Author:
Hongqiang Jin; Yu Yu; Qikai Shen; Peipei Li; Jia Yu; Weiming Chen; Xin Wang; Zhuo Kang; Lei Zhu; Runqing Zhao; Lirong Zheng; Weiguo Song; Changyan Cao
Source:
Journal of materials chemistry A 2021 v.9 no.24 pp. 13996-14003
ISSN:
2050-7496
Subject:
X-ray absorption spectroscopy; X-ray photoelectron spectroscopy; aqueous solutions; catalytic activity; cations; electrochemistry; hydrogen production; irradiation; light; molybdenum disulfide; nanosheets; nanowires; photocatalysts; sulfur; transmission electron microscopy
Abstract:
... 1T-phase molybdenum disulphide (MoS₂) is considered to be one of the most promising candidates to substitute noble metals in the hydrogen evolution reaction (HER). Fabricating single layer 1T-phase MoS₂ with abundant sulfur vacancies as well as good stability to further enhance catalytic performance remains a challenge. Herein, we develop an efficient in situ TMA cation ((CH₃)₄N⁺) intercalation me ...
DOI:
10.1039/d1ta03513d

91. Dual Electrical Behavior of Multivalent Metal Cation-Based Oxide and Its Application to Thin-Film Transistors with High Mobility and Excellent Photobias Stability

Author:
Yun Myeong Gu; Ahn Cheol Hyoun; Cho Sung Woon; Kim So Hee; Kim Ye Kyun; Cho Hyung Koun
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.11 pp. 6118-6124
ISSN:
1944-8252
Subject:
X-ray photoelectron spectroscopy; cations; electrical properties; lighting; oxides; oxygen; photons; tin; vanadium; zinc
Abstract:
... The effect of multivalent metal cations, including vanadium(V) and tin (Sn), on the electrical properties of vanadium-doped zinc tin oxide (VZTO) was investigated in the context of the fabrication of thin-film transistors (TFTs) using a single VZTO film and VZTO/ZTO bilayer as channel layers. The single VZTO TFT did not show any response to the gate voltage (insulator-like behavior). On the other ...
DOI:
10.1021/am5085836

92. Economical Way to Synthesize SSZ-13 with Abundant Ion-Exchanged Cu+ for an Extraordinary Performance in Selective Catalytic Reduction (SCR) of NOx by Ammonia

Author:
Chen Biaohua; Xu Ruinian; Zhang Runduo; Liu Ning
Source:
Environmental Science & Technology 2014 v.48 no.23 pp. 13909-13916
ISSN:
1520-5851
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; ammonia; catalysts; cations; chlorides; choline; cupric oxide; ion exchange; nitrates; nitrogen; nitrogen oxides; sulfur dioxide; topology; zeolites
Abstract:
... In this study, an economical way for SSZ-13 preparation with the essentially cheap choline chloride as template has been attempted. The as-synthesized SSZ-13 zeolite after ion exchange by copper nitrate solution exhibited a superior SCR performance (over 95% NOₓ conversion across a broad range from 150 to 400 °C) to the traditional zeolite-based catalysts of Cu-Beta and Cu-ZSM-5. Furthermore, the ...
DOI:
10.1021/es503707c

93. Effect of Ablation Rate on the Microstructure and Electrochromic Properties of Pulsed-Laser-Deposited Molybdenum Oxide Thin Films

Author:
Santhosh S.; Mathankumar M.; Selva Chandrasekaran S.; Nanda Kumar A. K.; Murugan P.; Subramanian B.
Source:
Langmuir 2017 v.33 no.1 pp. 19-33
ISSN:
1520-5827
Subject:
X-ray photoelectron spectroscopy; cations; color; crystallites; microstructure; molybdenum; nuclear magnetic resonance spectroscopy; oxygen; texture
Abstract:
... Molybdenum trioxide (MoO₃) is a well-known electrochromic material. In the present work, n-type α-MoO₃ thin films with both direct and indirect band gaps were fabricated by varying the laser repetition (ablation) rate in a pulsed laser deposition (PLD) system at a constant reactive O₂ pressure. The electrochromic properties of the films are compared and correlated to the microstructure and molecul ...
DOI:
10.1021/acs.langmuir.6b02940

94. Effect of Conducting Salts in Ionic Liquid Electrolytes for Enhanced Cyclability of Sodium-Ion Batteries

Author:
Minh Phuong Do; Nicolas Bucher; Arun Nagasubramanian; Iulius Markovits; Tian Bingbing; Pauline J. Fischer; Kian Ping Loh; Fritz E. Kühn; Madhavi Srinivasan
Source:
ACS applied materials & interfaces 2019 v.11 no.27 pp. 23972-23981
ISSN:
1944-8252
Subject:
X-ray photoelectron spectroscopy; anodes; batteries; carbonates; cathodes; cations; electrochemistry; ethylene; ionic liquids; propylene; sodium; sodium fluoride; sodium perchlorate
Abstract:
... The electrochemical performance of ionic liquid electrolytes containing different sodium salts dissolved in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPTFSI) evaluated in a half-cell configuration using spherical P2-Na₀.₆Co₀.₁Mn₀.₉O₂₊z (NCO) cathodes are reported. Among the various electrolytes investigated, sodium bis(fluorosulfonyl)imide (NaFSI) (0.5 M) in BMPTFSI shows t ...
DOI:
10.1021/acsami.9b03279

95. Effect of Cu(II) ions on the enhancement of tetracycline adsorption by Fe3O4@SiO2-Chitosan/graphene oxide nanocomposite

Author:
Binyan Huang; Yunguo Liu; Bin Li; Shaobo Liu; Guangming Zeng; Zhiwei Zeng; Xiaohua Wang; Qimeng Ning; Bohong Zheng; Chunping Yang
Source:
Carbohydrate polymers 2017 v.157 pp. 576-585
ISSN:
0144-8617
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; aquatic environment; calcium; cations; copper; electrostatic interactions; heavy metals; magnesium; nanocomposites; pH; potassium; scanning electron microscopy; sodium; tetracycline; transmission electron microscopy; zeta potential
Abstract:
... Fe3O4@SiO2-Chitosan/GO (MSCG) nanocomposite was investigated by various techniques (SEM, TEM, XRD, VSM, FT-IR, XPS) for the removal of tetracycline (TC). Effects of pH, zeta potential and initial contaminant concentration were studied in detail. Four background cations (Na+, K+, Ca2+ and Mg2+) with a concentration of 0.01M showed little influence on the TC adsorption at the studied pH range while ...
DOI:
10.1016/j.carbpol.2016.10.025

96. Effect of Pt/TiO2 characteristics on temporal behavior of o-cresol decomposition by visible light-induced photocatalysis

Author:
Chen, H.W.; Ku, Y.; Kuo, Y.L.
Source:
Water research 2007 v.41 no.10 pp. 2069-2078
ISSN:
0043-1354
Subject:
platinum; surface area; cations; o-cresol; scanning electron microscopy; spectral analysis; mass spectrometry; X-ray photoelectron spectroscopy; reaction kinetics; absorbance; waste treatment; oxidation; irradiation; photolysis; titanium dioxide; ultraviolet-visible spectroscopy; X-ray diffraction; quartz; gas chromatography; light
DOI:
10.1016/j.watres.2007.02.021
PubMed:
17418366

97. Effect of composition and microstructure on electrical properties and CO₂ stability of donor-doped, proton conducting BaCe₁₋₍ₓ₊y₎ZrₓNbyO₃

Author:
Colin M. Gore; Joseph O. White; Eric D. Wachsman; Venkataraman Thangadurai
Source:
Journal of materials chemistry A 2014 v.2 no.7 pp. 2363-2373
ISSN:
2050-7496
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; activation energy; air; barium; carbon dioxide; cations; dielectric spectroscopy; electrical conductivity; energy-dispersive X-ray analysis; hydrogen; microstructure; nitrogen; porosity; protons; scanning electron microscopy; stoichiometry; temperature; zirconium
Abstract:
... Acceptor-doped BaCeO₃ perovskites have frequently been studied as high temperature proton conductors (HTPCs) where conduction occurs due to hydroxyl protons that occupy the oxide ion vacancies in the perovskite-type structure. Recently, donor-doped perovskites of the nominal composition BaCe₀.₇Zr₀.₂Nb₀.₁O₃ have demonstrated mixed proton–electron conduction in humidified H₂ and N₂. The proton condu ...
DOI:
10.1039/c3ta12668d

98. Effect of crystal orientation on the segregation of aliovalent dopants at the surface of La₀.₆Sr₀.₄CoO₃

Author:
Fatih Pişkin; Roland Bliem; Bilge Yildiz
Source:
Journal of materials chemistry 2018 v.6 no.29 pp. 14136-14145
ISSN:
2050-7496
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; air; cations; energy; models; oxides; pellets; scanning electron microscopy; strontium
Abstract:
... The effect of crystal orientation on aliovalent dopant segregation at the surface of La₀.₆Sr₀.₄CoO₃ as a model perovskite oxide was investigated. La₀.₆Sr₀.₄CoO₃ pellets were produced and then annealed in air at 800 °C for 2–5 hours to drive the cation segregation at the surface. To quantify the chemical state of the pellets' surface, including cation composition and secondary phase precipitates ri ...
DOI:
10.1039/c8ta01293h

99. Effect of precursor concentration on the properties and tuning of conductivity between p-type and n-type Cu₁₋XCdXS₂ thin films deposited by a single step solution process as a novel material for photovoltaic applications

Author:
V. Nirmal Kumar; R. Suryakarthick; S. Karuppusamy; Mukul Gupta; Y. Hayakawa; R. Gopalakrishnan
Source:
RSC advances 2015 v.5 no.29 pp. 23015-23021
ISSN:
2046-2069
Subject:
Raman spectroscopy; X-ray photoelectron spectroscopy; absorption; adhesion; ambient temperature; cadmium; cations; color; copper; electrical properties; films (materials); solar cells; stoichiometry; sulfides
Abstract:
... Cu₁₋XCdXS₂ thin films were deposited from precursor solutions having different concentrations of cation sources, by a single step solution process at room temperature. The colours of the deposited films changed from light to dark brown based on the incorporation of copper and cadmium ions from the precursors. Cu₁₋XCdXS₂ polycrystalline thin films exhibit a hexagonal structure. Cd rich films showed ...
DOI:
10.1039/c4ra12565g

100. Effective capture of aqueous uranium from saline lake with magnesium-based binary and ternary layered double hydroxides

Author:
Jingwei Tu; Xiaoqian Peng; Shuting Wang; Chen Tian; Hong Deng; Zhi Dang; Guining Lu; Zhenqing Shi; Zhang Lin
Source:
Science of the total environment 2019 v.677 pp. 556-563
ISSN:
0048-9697
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; carbonates; cations; coprecipitation; hydroxides; magnesium; salt lakes; uranium; wastes
Abstract:
... Uranium in saline lake brine is a nuclear resource that attracts worldwide attention. Relatively low concentrations (about 0.2 mg L−1 to 30 mg L−1) require high affinity for the capture materials. In this paper, magnesium binary layered double hydroxides (MgAl-LDH) and its Fe-induced ternary LDH (MgAlFe-LDH) were synthesized for the extraction of simulated concentrations of U(VI) in the saline lak ...
DOI:
10.1016/j.scitotenv.2019.04.429