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You searched for: Subject anions Remove constraint Subject: anions Subject term X-ray photoelectron spectroscopy Remove constraint Subject term: X-ray photoelectron spectroscopy Subject term cations Remove constraint Subject term: cations
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1. Efficient removal of perfluorooctane sulphonate by nanofiltration: Insights into the effect and mechanism of coexisting inorganic ions and humic acid

Author:
Changwei Zhao; Tong Zhang; Guangshuo Hu; Jun Ma; Ruiping Song; Jiding Li
Source:
Journal of membrane science 2020 v.610 pp. 118176
ISSN:
0376-7388
Subject:
X-ray photoelectron spectroscopy; anions; artificial membranes; atomic force microscopy; calcium; cations; density functional theory; electrostatic interactions; humic acids; inorganic ions; nanofiltration; perfluorooctane sulfonic acid; sieving; sulfonates; thermodynamics; zeta potential
Abstract:
... The removal of perfluorooctane sulphonate (PFOS) with coexisting substances is very important. Inorganic ions and humic acid (HA) commonly coexist and may influence PFOS removal performance. However, there is little information on the capacity for systematic PFOS removal in the presence of inorganic ions and HA during nanofiltration (NF) process. In this paper, the impact of the coexistence of ani ...
DOI:
10.1016/j.memsci.2020.118176

2. Reversible Energy Storage in Layered Copper-Based Coordination Polymers: Unveiling the Influence of the Ligand’s Functional Group on Their Electrochemical Properties

Author:
Marco Amores; Keisuke Wada; Ken Sakaushi; Hiroshi Nishihara
Source:
Journal of physical chemistry 2020 v.124 no.17 pp. 9215-9224
ISSN:
1932-7455
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; anions; benzene; cations; coordination polymers; copper; electrochemistry; electrodes; energy; ligands; mass spectrometry; metal ions; models; moieties; structure-activity relationships; voltammetry
Abstract:
... Coordination polymers represent a suitable model for studying redox mechanisms in materials where both metal cations and ligands undergo electrochemical reactions and are capable of proceeding through reversible multielectron-transfer processes with the insertion of cations and anions into their open structures. Designing new coordination polymers for electrochemical energy storage with improved p ...
DOI:
10.1021/acs.jpcc.0c01486

3. Synthesis and characterization of a high-quality nanocontainer based on benzimidazole-zinc phosphate (ZP-BIM) tailored graphene oxides; a facile approach to fabricating a smart self-healing anti-corrosion system

Author:
Sina Asaldoust; Bahram Ramezanzadeh
Source:
Journal of colloid and interface science 2020 v.564 pp. 230-244
ISSN:
0021-9797
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; anions; cations; coatings; corrosion; electrochemistry; energy-dispersive X-ray analysis; epoxides; graphene; graphene oxide; nanocarriers; phosphates; scanning electron microscopy; sodium chloride; steel; zinc
Abstract:
... This paper describes the synthesis of a novel corrosion inhibitor nanocarrier based on benzimidazole-zinc phosphate (ZP-BIM) tailored graphene oxide (GO) and its application in the epoxy-based composite coating for the achievement of smart self-healing anti-corrosion properties toward mild steel (MS) against saline solution. The morphology and chemical/phase composition of the GO-ZP-BIM particles ...
DOI:
10.1016/j.jcis.2019.12.122

4. 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

5. 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

6. Efficient simultaneous removal of cadmium and arsenic in aqueous solution by titanium-modified ultrasonic biochar

Author:
Mingke Luo; Hai Lin; Yinhai He; Bing Li; Yingbo Dong; Liang Wang
Source:
Bioresource technology 2019 v.284 pp. 333-339
ISSN:
0960-8524
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorption; anions; aqueous solutions; arsenic; biochar; biosorbents; cadmium; cations; energy-dispersive X-ray analysis; ion exchange; pH; scanning electron microscopy; sorbents; surface area; titanium dioxide; ultrasonics; wastewater
Abstract:
... Simultaneous removal of cations and anions in wastewater has always been a great concerned environmental problem. In this study, a friendly and inexpensive biosorbent to simultaneously remove Cd(II) and As(V) from aqueous solution was synthesized by ultrasonic biochar and nanoscale TiO2 (TD), and the obtained sorbent was named as BCTD. The maximum sorption capacities of Cd (72.62 mg/g) and As (118 ...
DOI:
10.1016/j.biortech.2019.03.108

7. Enhanced adsorption of cationic Pb(II) and anionic Cr(VI) ions in aqueous solution by amino-modified nano-sized illite-smectite clay

Author:
Zhenyuan Li; Zhidong Pan; Yanmin Wang
Source:
Environmental science and pollution research 2019 v.26 no.11 pp. 11126-11139
ISSN:
1614-7499
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; anions; aqueous solutions; cations; chromium; clay; grinding; lead; models; nuclear magnetic resonance spectroscopy; particle size; particle size distribution; scanning electron microscopy; silicon; sorption isotherms; surface area; temperature; thermogravimetry
Abstract:
... A raw illite-smectite mixed-layered clay (RI/S) was ground for preparing nano-sized I/S clay (NI/S) and subsequently amino-functionalized via grafting of 3-aminopropyltrithoxysilane (APTES) (NH₂-RI/S and NH₂-NI/S, respectively). The samples were characterized by particle size analysis, specific surface area measurement, X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric ...
DOI:
10.1007/s11356-019-04447-0

8. Enhanced catalytic performance for VOCs oxidation on the CoAlO oxides by KMnO4 doped on facile synthesis

Author:
Qian Zhao; Qingling Liu; Chunfeng Song; Na Ji; Degang Ma; Xuebin Lu
Source:
Chemosphere 2019 v.218 pp. 895-906
ISSN:
0045-6535
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; acetone; air; anions; carbonates; catalysts; catalytic activity; cations; chlorides; coal; cobalt; ethyl acetate; industrial applications; manganese; manganese oxides; nitrates; oxidation; oxygen; potassium permanganate; sulfates; volatile organic compounds; water vapor
Abstract:
... The MnOₓ was immobilized on the CoAl mixed oxides (CoAlO) derived from hydrotalcites with various anions (CO₃²⁻, Cl⁻, NO₃⁻ and SO₄²⁻) using the hydration and impregnation methods. The CoAlO oxides modified by KMnO₄ were calcined in air at 300 °C to obtain stable oxides, which could be used as catalysts for VOCs (acetone and ethyl acetate) oxidation. CoAlO with CO₃²⁻ and 30 h of hydration time (CoA ...
DOI:
10.1016/j.chemosphere.2018.11.131

9. Improved phosphoric acid recovery from sewage sludge ash using layer-by-layer modified membranes

Author:
Laura Paltrinieri; Kirsten Remmen; Barbara Müller; Liangyong Chu; Joachim Köser; Thomas Wintgens; Matthias Wessling; Louis C.P.M. de Smet; Ernst J.R. Sudhölter
Source:
Journal of membrane science 2019 v.587 pp. 117162
ISSN:
0376-7388
Subject:
X-ray photoelectron spectroscopy; acid tolerance; anions; artificial membranes; atomic force microscopy; cations; guanidinium; iron; magnesium; microfiltration; nanofiltration; pH; permeability; phosphoric acid; polyallylamines; polycyclic aromatic hydrocarbons; quaternary ammonium compounds; sludge ash; ultrafiltration; zeta potential
Abstract:
... We report an advanced treatment method for phosphoric acid recovery from leached sewage sludge ash. Layer-by-layer (LbL) polyelectrolyte deposition has been used as a tool to modify and convert a hollow ultrafiltration membrane into a nanofiltration (NF) LbL membrane for H3PO4 recovery. To build the LbL membrane, poly(styrenesulfonate) PSS was chosen as polyanion, while three different polycations ...
DOI:
10.1016/j.memsci.2019.06.002

10. Investigation of the Electrode/Ionic Liquid Interphase: Chemical Reactions of an Ionic Liquid and a Lithium Salt with Lithiated Graphite Probed by X-ray Photoelectron Spectroscopy

Author:
Zhen Liu; Guozhu Li; Andriy Borodin; Xiaoxu Liu; Yao Li; Frank Endres
Source:
Journal of physical chemistry 2019 v.123 no.16 pp. 10325-10332
ISSN:
1932-7455
Subject:
X-ray photoelectron spectroscopy; anions; annealing; cations; chemical reactions; electrodes; graphene; interphase; ionic liquids; lithium; lithium batteries; physical chemistry; temperature
Abstract:
... The solid electrolyte interphase (SEI) plays an important role in the performance of a Li-ion battery. A detailed insight into the chemical reactions between the electrolyte and lithium at the electrode/electrolyte interphase is thus of great interest. In the present paper, two different sequences of stepwise nanometer-thick depositions of the ionic liquid 1-ethyl-3-methylimidazolium bis(fluorosul ...
DOI:
10.1021/acs.jpcc.8b11549

11. Langmuir–Blodgett Monolayers of Partially Fluorinated Ionic Liquids as Two-Dimensional, More Sustainable Functional Materials and Coatings

Author:
Thorben Sieling; Jens Christoffers; Izabella Brand
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.13 pp. 11593-11602
ISSN:
2168-0485
Subject:
X-ray photoelectron spectroscopy; air; anions; carbon; catalytic activity; cations; chemical structure; coatings; electrochemistry; environmental impact; gold; hydrophobicity; imidazoles; ionic liquids; liquid-air interface; perfluorocarbons
Abstract:
... The structure of cations and anions in ionic liquids is precisely selected to tune their properties for applications in catalysis, electrochemistry, or development of sensors. Substitution of a hydrocarbon by a fluorocarbon chain in either the cation or the anion yields fluorinated ionic liquids (FILs). The ionic character combined with hydrophobic and lipophobic properties of fluorocarbon chains ...
DOI:
10.1021/acssuschemeng.9b01496

12. Simultaneous adsorption and immobilization of As and Cd by birnessite-loaded biochar in water and soil

Author:
Hong-Yan Wang; Peng Chen; Yong-Guan Zhu; Kuang Cen; Guo-Xin Sun
Source:
Environmental science and pollution research international 2019 v.26 no.9 pp. 8575-8584
ISSN:
0944-1344
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; anions; arsenic; biochar; birnessite; cadmium; cations; heavy metals; models; moieties; remediation; scanning electron microscopy; soil; sorbents; sorption isotherms
Abstract:
... A novel biochar was prepared by loading birnessite to improve its capability to simultaneously adsorb As(III), As(V), and Cd(II) in water and soil. Layer sheet–structured birnessite was successfully loaded onto the biochar surface with increased functional groups. SEM, XRD, and FTIR combining with XPS analysis were utilized to characterize birnessite-loaded biochar and its adsorption mechanisms fo ...
DOI:
10.1007/s11356-019-04315-x

13. 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

14. 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

15. Elucidation of Chemical Species and Reactivity at Methylammonium Lead Iodide and Cesium Tin Bromide Perovskite Surfaces via Orthogonal Reaction Chemistry

Author:
Weiran Gao; Kenneth Zielinski; Benjamin N. Drury; Alexander D. Carl; Ronald L. Grimm
Source:
Journal of physical chemistry 2018 v.122 no.31 pp. 17882-17894
ISSN:
1932-7455
Subject:
X-ray photoelectron spectroscopy; activation energy; adsorption; anions; bromides; cation exchange; cations; cesium; chemical species; chlorides; chlorine; derivatization; desorption; energy conversion; fluorine; iodides; lead; ligands; tin
Abstract:
... We quantified the chemical species present at and reactivity of the (100) face of tetrahedral single-crystal methylammonium lead iodide, MAPbI₃(100), and polycrystalline cesium tin bromide, CsSnBr₃. For these ABX₃ perovskites, experiments utilized the orthogonal reactivity of the A⁺-site cation, the B²⁺-site cation, and the X–-site halide anion. Ambient pressure exposure to BF₃ solutions probed th ...
DOI:
10.1021/acs.jpcc.8b05352

16. Enhanced Cr(VI) removal from acidic solutions using biochar modified by Fe3O4@SiO2-NH2 particles

Author:
Shunquan Shi; Jiakuan Yang; Sha Liang; Mingyang Li; Quan Gan; Keke Xiao; Jingping Hu
Source:
Science of the total environment 2018 v.628-629 pp. 499-508
ISSN:
0048-9697
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; anions; biochar; carboxylation; cations; chelation; chemical bonding; chromium; iron; magnetic properties; magnetism; recycling; trees; wastewater
Abstract:
... Fe₃O₄@SiO₂-NH₂ magnetic particles with core-shell structure were attached on carboxylated biochar derived from phoenix tree leaves to synthesize a novel magnetic biochar for removing Cr(VI) ions from acidic solutions. FSEM, FTEM, XRD characterizations of the synthesized magnetic biochar revealed that the Fe₃O₄@SiO₂-NH₂ magnetic particles distributed uniformly on the surface or macrospores of carbo ...
DOI:
10.1016/j.scitotenv.2018.02.091

17. Enhancing the Catalytic Performance of Candida antarctica Lipase B by Immobilization onto the Ionic Liquids Modified SBA‐15

Author:
Nanjing Zhong; Yue Li; Chunsheng Cai; Yongqing Gao; Ning Liu; Guoqin Liu; Wenying Tan; Yaoying Zeng
Source:
European journal of lipid science and technology 2018 v.120 no.4 pp. e1700357
ISSN:
1438-7697
Subject:
Fourier transform infrared spectroscopy; Pseudozyma antarctica; X-ray diffraction; X-ray photoelectron spectroscopy; anions; carboxylic ester hydrolases; catalytic activity; cations; corn oil; diacylglycerols; enzyme activity; ionic liquids; porous media; silica; triacylglycerols
Abstract:
... In this study, mesoporous silica SBA‐15 is modified by imidazole based ionic liquids (IL) with three different side‐chain length of cations and two different anions. Prepared supports (IL‐SBA‐15) are characterized by small‐angle powder X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS) as well as Fourier transform infrared (FT‐IR), and then used to immobilize Candida antarctica lipase ...
DOI:
10.1002/ejlt.201700357

18. Molten Salt Flux Synthesis, Crystal Facet Design, Characterization, Electronic Structure, and Catalytic Properties of Perovskite Cobaltite

Author:
Xiyang Wang; Keke Huang; Long Yuan; Shuang Li; Wei Ma; Zhongyuan Liu; Shouhua Feng
Source:
ACS applied materials & interfaces 2018 v.10 no.33 pp. 28219-28231
ISSN:
1944-8252
Subject:
X-ray absorption spectroscopy; X-ray photoelectron spectroscopy; anions; carbon monoxide; catalysts; catalytic activity; cations; chlorides; cobalt; cost effectiveness; crystal structure; models; oxidation; oxygen; strontium
Abstract:
... We present a simple and cost-effective molten salt synthetic route toward phase-pure perovskite cobaltite microcrystallines and successfully regulate different crystal facets for perovskite LaCoO₃ by the strong interaction between Cl– anions and Sr²⁺ cations in molten salt system and polar plane. We then take LaCoO₃ (100 and 110), LaCoO₃ (111), and La₀.₇Sr₀.₃CoO₃ (111) as comparison models, and we ...
DOI:
10.1021/acsami.8b08621

19. 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

20. 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