U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Publication year rev 7982-2018 Remove constraint Publication year rev: 7982-2018 Subject term chemical bonding Remove constraint Subject term: chemical bonding Subject term X-ray diffraction Remove constraint Subject term: X-ray diffraction Subject term X-ray photoelectron spectroscopy Remove constraint Subject term: X-ray photoelectron spectroscopy Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
Start Over

Search

31  Search Results

1 - 31 of 31
Number of results to display per page

Search Results

1. Catalytic Transfer Hydrogenolysis of Lignin-Derived Aromatic Ethers Promoted by Bimetallic Pd/Ni Systems

Author:
Francesco Mauriello; Emilia Paone; Rosario Pietropaolo; Alina M. Balu; Rafael Luque
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.7 pp. 9269-9276
ISSN:
2168-0485
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; catalysts; chemical bonding; cleavage (chemistry); coprecipitation; diphenyl ethers; hydrogenation; lignin; magnetism; models; moieties; nickel; palladium; phenol; physicochemical properties; recycling; temperature; transmission electron microscopy
Abstract:
... Catalytic transfer hydrogenolysis (CTH) of diphenyl ether (DPE), 2-phenethyl phenyl ether (PPE), and benzyl phenyl ether (BPE)—as model molecules of α-O-4 and β-O-4 as well as 4-O-5 lignin linkages—promoted by bimetallic Pd/Ni systems is reported. Pd/Ni (Pd loading of 3 wt %) catalysts were synthesized by using a simple and economic coprecipitation technique, and its detailed physicochemical chara ...
DOI:
10.1021/acssuschemeng.8b01593

2. Effect of Co partial substitution on the valence state of Ru in the Gd2−xCo x Ru2O7 pyrochlore

Author:
A. A. Castro; F. Morales; M. Romero; A. Conde- Gallardo; R. Escamilla
Source:
Journal of materials science 2018 v.53 no.11 pp. 8067-8073
ISSN:
0022-2461
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; chemical bonding; cobalt; electrical resistance
Abstract:
... Polycrystalline samples of Gd₂₋ₓCo ₓ Ru₂O₇ with x = 0.0, 0.1 and 0.4 were synthesized by the molten salt method. The samples were studied by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrical resistivity measurements. Rietveld refinements of the XRD patterns and XPS measurements showed that the Co²⁺ ion replaces Gd³⁺ sites. As a result, the lattice parameter a and the R ...
DOI:
10.1007/s10853-018-2162-2

3. Preparation of fluorinated graphene to study its gas sensitivity

Author:
Wenze Kang; Shangyi Li
Source:
RSC advances 2018 v.8 no.41 pp. 23459-23467
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; ammonia; atomic force microscopy; chemical bonding; ethanol; fluorides; fluorine; formaldehyde; gases; graphene; methane; transmission electron microscopes; transmission electron microscopy
Abstract:
... In this paper, fluorinated graphene was prepared from graphite fluoride by an improved Hummers method. The fluorinated graphene was characterized using an X-ray diffractometer (XRD), transmission electron microscope (TEM), atomic force microscope (AFM) and X-ray photoelectron spectrometer (XPS). Moreover, a gas sensitivity test was carried out. The results show that the fluorinated graphene is com ...
DOI:
10.1039/c8ra03451f

4. Stability Investigation of a Supported TiO₂–Pd Bifunctional Catalyst over the One-Pot Liquid-Phase Synthesis of Methyl Isobutyl Ketone from Acetone and H₂

Author:
Hui Duan; Zhihui Wang; Lifeng Cui; Baining Lin; Yonghua Zhou
Source:
Industrial & engineering chemistry process design and development 2018 v.57 no.37 pp. 12358-12366
ISSN:
1520-5045
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; acetone; active sites; ammonia; carbon dioxide; catalysts; chemical bonding; dehydrogenation; desorption; hydrogen; industry; process design; pyrolysis; silica; thermogravimetry; titanium dioxide
Abstract:
... The one-pot liquid-phase synthesis of methyl isobutyl ketone (MIBK) from acetone and H₂ is a significant process in the fine-chemicals industry. In this paper, we fabricated a series of TiO₂–SiO₂/SiO₂(F)&Pd/Cor bifunctional catalysts and optimized the ratio of TiO₂ to SiO₂ to be 1. The catalyst with the optimal mole ratio of TiO₂ to SiO₂ was further investigated in a long-term operation in a trick ...
DOI:
10.1021/acs.iecr.8b02854

5. Structural elucidation of supported Rh complexes derived from RhCl(PPh3)3 immobilized on surface-functionalized SBA-15 and their catalytic performance for C-heteroatom (S, O) bond formation

Author:
Yong Yang; Ji Wong Chang; Robert M. Rioux
Source:
Journal of catalysis 2018 v.365 pp. 43-54
ISSN:
0021-9517
Subject:
rhodium; silica; X-ray photoelectron spectroscopy; X-ray diffraction; nuclear magnetic resonance spectroscopy; stereoselectivity; thiols; X-ray absorption spectroscopy; ligands; porous media; chemical bonding; sulfonic acids; alkynes; transmission electron microscopy; phosphorus; catalytic activity; stable isotopes; moieties
Abstract:
... The local structures of rhodium complexes derived from the immobilization of Wilkinson’s complex, RhCl(PPh₃)₃, on SBA-15 silica functionalized with primary–amine, secondary–amine, or diphenylphosphine groups within the mesoporous channels were characterized by a series of techniques including XRD, HR-TEM, multinuclear (¹³C/²⁹Si/³¹P) solid-state NMR, 2D ³¹P{¹H} HETCOR NMR, XPS, and Rh K-edge EXAFS. ...
DOI:
10.1016/j.jcat.2018.06.012

6. Synthesis, Structure and Electronic Properties of Graphitic Carbon Nitride Films

Author:
Theo Suter; Veronika Brázdová; Kit McColl; Thomas S. Miller; Hiroki Nagashima; Enrico Salvadori; Andrea Sella; Christopher A. Howard; Christopher W. M. Kay; Furio Corà; Paul F. McMillan
Source:
Journal of physical chemistry 2018 v.122 no.44 pp. 25183-25194
ISSN:
1932-7455
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; carbon nitride; carbon nitrogen ratio; catalytic activity; chemical bonding; color; density functional theory; dicyandiamide; electron paramagnetic resonance spectroscopy; energy; graphene; models; potassium bromide; transmission electron microscopy
Abstract:
... Dark-colored shiny flakes of graphitic carbon nitride materials produced by reacting dicyandiamide C₂N₄H₄ in a KBr/LiBr molten salt medium were determined to have a C/N ratio near 1.2:1. The compounds also contained 2.3–2.5 wt % H incorporated within N–H species identified by Fourier transform infrared spectroscopy. One recent study revealed analogous results for thin films produced by an similar ...
DOI:
10.1021/acs.jpcc.8b07972

7. The changes of surface properties and enhancement of B2O3 leaching ratio of boron concentrate via wet ball milling

Author:
Yingzhe Xu; Tao Jiang; Huiyang Gao; Wanying Chen; Xiangxin Xue
Source:
Powder technology 2018 v.326 pp. 89-100
ISSN:
0032-5910
Subject:
Fourier transform infrared spectroscopy; Gibbs free energy; X-ray diffraction; X-ray photoelectron spectroscopy; absorption; boron; chemical bonding; chemical reactions; crystal structure; differential scanning calorimetry; hydrophilicity; leaching; liquids; milling; powders; raw materials; scanning electron microscopy; solvents; surface area; thermogravimetry; China
Abstract:
... With the ascharite used up in China, boron concentrate was used as raw material for extracting B2O3. In this study, an environmental wet ball milling (WBM) method was proposed to enhance the B2O3 leaching ratio, and the effect of liquid medium, rotational speed and milling time on the properties of boron concentrate in WBM process was discussed. This surface properties of milled samples was charac ...
DOI:
10.1016/j.powtec.2017.12.056

8. Toward Excellent Tribological Performance as Oil-Based Lubricant Additive: Particular Tribological Behavior of Fluorinated Graphene

Author:
Kun Fan; Xinyu Chen; Xu Wang; Xikui Liu; Yang Liu; Wenchuan Lai; Xiangyang Liu
Source:
ACS applied materials & interfaces 2018 v.10 no.34 pp. 28828-28838
ISSN:
1944-8252
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; chemical bonding; dispersibility; friction; graphene; infrared spectroscopy; lubricants; materials science; thermal stability
Abstract:
... The poor dispersibility, strong interlayer interaction, and inferior crack resistance ability restrict the employment of graphene as a lubricant additive. Herein, we prepared fluorinated graphene with different F/C ratios by direct fluorination of multilayer graphene utilizing F₂. Among them, highly fluorinated graphene (HFG) with an F/C ratio of about 1.0 presented prominent thermal stability and ...
DOI:
10.1021/acsami.8b07635

9. A Self-Assembled Supramolecular Material Containing Phosphoric Acid for Ultrafast and Efficient Capture of Uranium from Acidic Solutions

Author:
Ning Pan; Yongdong Jin; Xiaoqiang Wang; Xiaoping Hu; Fangting Chi; Hao Zou; Chuanqin Xia
Source:
ACS sustainable chemistry & engineering 2018 v.7 no.1 pp. 950-960
ISSN:
2168-0485
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray fluorescence spectroscopy; X-ray photoelectron spectroscopy; adsorbents; adsorption; aqueous solutions; chemical bonding; melamine; nitrogen; oxygen; phosphoric acid; phytic acid; scanning electron microscopy; sodium carbonate; uranium; uranyl ions
Abstract:
... Herein, we report a convenient method for the preparation of a self-assembled supramolecular material containing phosphoric acid (PM) choosing phytic acid and melamine as the two organic building blocks. The PM was chosen as an adsorbent for the first time for the fast adsorption and recovery of U(VI) from acidic aqueous media. The batch adsorption experiments showed that PM-9 possesses a very fas ...
DOI:
10.1021/acssuschemeng.8b04596

10. Annealing of silicon carbonitride nanostructured thin films: interdependency of hydrogen content, optical, and structural properties

Author:
Z. Khatami; C. Nowikow; J. Wojcik; P. Mascher
Source:
Journal of materials science 2018 v.53 no.2 pp. 1497-1513
ISSN:
0022-2461
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; annealing; chemical bonding; coatings; desorption; hydrogen; photovoltaic cells; quantitative analysis; refractive index; silicon; silicon carbide; temperature; transmission electron microscopy; vapors
Abstract:
... Silicon carbonitride (SiCₓNy) materials, inspired by their outstanding multifunctional properties, are finding increasing applications in a variety of fields, including as next generation solar cells and hard coatings. Hydrogenated SiCₓNy thin films, along with binary submatrices of stoichiometric SiC and SiN₃ as a reference, were deposited using electron cyclotron resonance plasma-enhanced chemic ...
DOI:
10.1007/s10853-017-1576-6

11. Defect-Induced Method for Preparing Hierarchical Porous Zr–MOF Materials for Ultrafast and Large-Scale Extraction of Uranium from Modified Artificial Seawater

Author:
Chunyue Yin; Qi Liu; Rongrong Chen; Jingyuan Liu; Jing Yu; Dalei Song; Jun Wang
Source:
Industrial & engineering chemistry process design and development 2018 v.58 no.3 pp. 1159-1166
ISSN:
1520-5045
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; active sites; adsorbents; adsorption; chemical bonding; coordination polymers; equations; models; pH; process design; seawater; sorption isotherms; surface area; uranium
Abstract:
... Metal–organic framework materials (MOFs) have attracted the attention of researchers as a new type of adsorbent material with large specific surface area and high adsorption capacity. In order to obtain a larger surface area and more adsorption active sites for MOF, we synthesized a hierarchical porous UIO-66 (HP-UIO-66) MOF material by the defect induction method. X-ray diffraction (XRD) and Four ...
DOI:
10.1021/acs.iecr.8b04034

12. Effect of glycine functionalization of 2D titanium carbide (MXene) on charge storage

Author:
Chi Chen; Muhammad Boota; Patrick Urbankowski; Babak Anasori; Ling Miao; Jianjun Jiang; Yury Gogotsi
Source:
Journal of materials chemistry 2018 v.6 no.11 pp. 4617-4622
ISSN:
2050-7496
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; chemical bonding; electrons; energy; films (materials); ions; prediction; titanium
Abstract:
... Restacking of two-dimensional (2D) flakes reduces the accessibility of electrolyte ions and is a problem in energy storage and other applications. Organic molecules can be used to prevent restacking and keep the interlayer space open. Here, we report on a combined theoretical and experimental investigation of the interaction between 2D titanium carbide (MXene), Ti₃C₂Tₓ, and glycine. From first pri ...
DOI:
10.1039/c7ta11347a

13. Effects of Sulfur on the Solidification of Cadmium during Clinkerization

Author:
Bin Zhang; Jiangxiong Wei; Zhengxiang Zeng; Weiting Xu; Qijun Yu
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.8 pp. 10645-10653
ISSN:
2168-0485
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; atomic absorption spectrometry; cadmium; calcium; cement; chemical bonding; energy-dispersive X-ray analysis; ferrimagnetic materials; heavy metals; raw materials; silicates; solid wastes; solidification; sulfates; sulfides; sulfur; sustainable development; temperature
Abstract:
... The solidification of heavy metals during clinkerization is very important to the utilization of solid wastes in a cement kiln from the sustainable development and environmental perspective. In this study, sulfur, which is commonly contained in solid waste and cement raw materials, was taken into consideration to investigate its effects on the Cd solidification and mineral phases formation during ...
DOI:
10.1021/acssuschemeng.8b01970

14. 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

15. In situ hydrogenation and decarboxylation of oleic acid into heptadecane over a Cu–Ni alloy catalyst using methanol as a hydrogen carrier

Author:
Zihao Zhang; Qiwei Yang; Hao Chen; Kequan Chen; Xiuyang Lu; Pingkai Ouyang; Jie Fu; Jingguang G. Chen
Source:
Green chemistry 2018 v.20 no.1 pp. 197-205
ISSN:
1463-9270
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; acetic acid; adsorption; alloys; catalysts; catalytic activity; catalytic cracking; chemical bonding; copper; decarboxylation; desorption; energy-dispersive X-ray analysis; ethylene; green chemistry; hydrogen; hydrogenation; methanol; nickel; oleic acid; propane; temperature; transmission electron microscopy
Abstract:
... In this work, supported Cu–Ni bimetallic catalysts were synthesized and evaluated for the in situ hydrogenation and decarboxylation of oleic acid using methanol as a hydrogen donor. The supported Cu–Ni alloy exhibited a significant improvement in both activity and selectivity towards the production of heptadecane in comparison with monometallic Cu and Ni based catalysts. The formation of the Cu–Ni ...
DOI:
10.1039/c7gc02774e

16. Label-free surface plasmon resonance biosensing with titanium nitride thin film

Author:
Guangyu Qiu; Siu Pang Ng; Chi-Man Lawrence Wu
Source:
Biosensors & bioelectronics 2018 v.106 pp. 129-135
ISSN:
0956-5663
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; atomic force microscopy; binding capacity; biosensors; biotin; chemical bonding; computer simulation; energy; gold; nitrides; refractive index; surface plasmon resonance; titanium; wavelengths; white light
Abstract:
... In this report, titanium nitride thin film synthesized with reactive magneto-sputtering technique is proposed as an alternative surface plasmon resonance sensing material. The physical and chemical natures were initially studied by atomic force microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. In virtue of white-light common-path sensing system, the wavelength modulated TiN films ...
DOI:
10.1016/j.bios.2018.02.006

17. Mg–C Interaction Induced Hydrogen Uptake and Enhanced Hydrogen Release Kinetics in MgH₂-rGO Nanocomposites

Author:
Sweta Shriniwasan; Tathagata Kar; Manoj Neergat; Sankara Sarma V. Tatiparti
Source:
Journal of physical chemistry 2018 v.122 no.39 pp. 22389-22396
ISSN:
1932-7455
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; chemical bonding; electron transfer; electrons; hydrogen; magnesium; milling; nanocomposites
Abstract:
... Hydrogen uptake at 250 °C, PH₂ > 15 bar and release at 320, 350 °C by MgH₂ mixed with 10 wt % rGO alleviates the incubation period (slow kinetics) encountered during hydrogen release by pure MgH₂. Ball milling establishes Mg–C interactions (∼283 eV) in these nanocomposites through electron-transfer from Mg to π* of C and weakens the C–C π bond. These Mg–C interactions persist in the nanocomposites ...
DOI:
10.1021/acs.jpcc.8b05483

18. Microstructure evolution of polyimide films induced by electron beam irradiation-load coupling treatment

Author:
Shan-Shan Dong; Wen-Zhu Shao; Li Yang; Hui-Jian Ye; Liang Zhen
Source:
Polymer degradation and stability 2018 v.155 pp. 230-237
ISSN:
0141-3910
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; atomic force microscopy; chemical bonding; cleavage (chemistry); crosslinking; electrons; energy; free radicals; irradiation; mechanical testing; microstructure; oxygen; probability; scanning electron microscopy; surface quality; tensile strength
Abstract:
... Polyimide films are widely used in space with extreme environments, where high energy beam irradiation and corresponding coupling treatment could occur. The combined effect of high energy electrons (1.2 MeV) and high tensile stress (50 MPa) on the degradation behavior of polyimide films was studied by means of scanning electron microscopy, atomic force microscopy, X-ray diffraction, Fourier transf ...
DOI:
10.1016/j.polymdegradstab.2018.07.020

19. Morphology of cross-linked cellulose nanocrystal aerogels: cryo-templating versus pressurized gas expansion processing

Author:
Daniel A. Osorio; Bernhard Seifried; Paul Moquin; Kathryn Grandfield; Emily D. Cranston
Source:
Journal of materials science 2018 v.53 no.13 pp. 9842-9860
ISSN:
0022-2461
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; aerogels; cellulose; chemical bonding; crosslinking; drugs; freeze drying; insulating materials; macropores; micro-computed tomography; moieties; nanocrystals; nitrogen; porosity; scanning electron microscopy; sorption isotherms; surface area
Abstract:
... Cellulose nanocrystal (CNC)-based aerogels are often produced through cryo-templating, followed by either critical point drying or freeze drying. While cryo-templating gives aerogels with a bimodal pore size distribution, better morphological control may be needed for certain applications. This work compares CNC aerogels prepared using a new processing method, called pressurized gas expansion (PGX ...
DOI:
10.1007/s10853-018-2235-2

20. Phosphorus-Doped Hard Carbon Nanofibers Prepared by Electrospinning as an Anode in Sodium-Ion Batteries

Author:
Feng Wu; Ruiqi Dong; Ying Bai; Yu Li; Guanghai Chen; Zhaohua Wang; Chuan Wu
Source:
ACS applied materials & interfaces 2018 v.10 no.25 pp. 21335-21342
ISSN:
1944-8252
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; anodes; batteries; carbon; carbon nanofibers; chemical bonding; durability; electrochemistry; heat treatment; phosphoric acid; phosphorus; polyacrylonitrile; porous media
Abstract:
... Phosphorus-doped hard carbon nanofibers with macroporous structure were successfully synthesized by electrospinning followed by a thermal treatment process using polyacrylonitrile and H₃PO₄ as carbon and phosphorus precursors, respectively. X-ray photoelectron spectroscopy analysis reveals that the doped phosphorus atoms can incorporate into the carbon framework and most of them are connecting wit ...
DOI:
10.1021/acsami.8b05618

21. Photocatalytic and Photoluminescence Properties of Core–Shell SiO2@TiO2:Eu3+,Sm3+ and Its Etching Products

Author:
Meiqi Chang; Yanhua Song; Jie Chen; Lei Cui; Zhan Shi; Ye Sheng; Haifeng Zou
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.1 pp. 223-236
ISSN:
2168-0485
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; acidity; chemical bonding; europium; ions; oxidation; oxygen; photocatalysis; photoluminescence; scanning electron microscopy; silica; surface area; titanium dioxide; transmission electron microscopy
Abstract:
... A novel multifunctional core–shell, yolk–shell SiO₂@TiO₂:Eu³⁺/Sm³⁺ and hollow TiO₂:Eu³⁺/Sm³⁺ structures were successfully synthesized. The relationship between morphology/ions doping and multifunctional properties including photoluminescence and photocatalysis has been discussed in detail for the first time using systematic characterization techniques, including scanning electron microscopy (SEM), ...
DOI:
10.1021/acssuschemeng.7b02285

22. Removal of antimonate (Sb(V)) and antimonite (Sb(III)) from aqueous solutions by coagulation-flocculation-sedimentation (CFS): Dependence on influencing factors and insights into removal mechanisms

Author:
Wenjing Guo; Zhiyou Fu; Hao Wang; Shasha Liu; Fengchang Wu; John P. Giesy
Source:
Science of the total environment 2018 v.644 pp. 1277-1285
ISSN:
0048-9697
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; antimony; aqueous solutions; chemical bonding; coagulants; coprecipitation; electrostatic interactions; energy; energy-dispersive X-ray analysis; ferric sulfate; humic acids; pH; phosphates; water pollution
Abstract:
... This study investigates the effects of different influence factors on the removal of inorganic Sb species using coagulation-flocculation-sedimentation (CFS) and establishes the mechanism of the process. Thus, the influence of pH, initial Sb concentrations, coagulant dosages and competitive matters on Sb(V) and Sb(III) removal via CFS with polymeric ferric sulfate (PFS) was investigated systemicall ...
DOI:
10.1016/j.scitotenv.2018.07.034

23. Self-assembled supramolecular system PDINH on TiO2 surface enhances hydrogen production

Author:
Xin Li; Xingshuai Lv; Qianqian Zhang; Baibiao Huang; Peng Wang; Xiaoyan Qin; Xiaoyang Zhang; Ying Dai
Source:
Journal of colloid and interface science 2018 v.525 pp. 136-142
ISSN:
0021-9797
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; absorption; chemical bonding; crystal structure; electric current; hydrogen; hydrogen production; irradiation; photocatalysis; photocatalysts; raw materials; titanium dioxide; transmission electron microscopy; ultraviolet radiation
Abstract:
... Constructing organic-inorganic hybrids is one of the hopeful strategies to improve photocatalyst performance. In this study, perylene-3,4,9,10-tetracarboxylic diimide (PDINH) and commercial TiO₂ P25 are chosen as raw materials to construct a PDINH/TiO₂ organic-inorganic hybrid, which has higher photocatalytic H₂ production activity and photocurrent intensity than pure PDINH and TiO₂, respectively. ...
DOI:
10.1016/j.jcis.2018.04.041

24. Stable Dispersions of Covalently Tethered Polymer Improved Graphene Oxide Nanoconjugates as an Effective Vector for siRNA Delivery

Author:
Nisha Yadav; Naveen Kumar; Peeyush Prasad; Shivani Shirbhate; Seema Sehrawat; Bimlesh Lochab
Source:
ACS applied materials & interfaces 2018 v.10 no.17 pp. 14577-14593
ISSN:
1944-8252
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; Western blotting; X-radiation; X-ray diffraction; X-ray photoelectron spectroscopy; blood serum; cell movement; chemical bonding; cytotoxicity; dispersions; gel electrophoresis; graphene oxide; image analysis; light scattering; metastasis; neoplasms; pH; phosphates; photoluminescence; polyethylene glycol; scanning electron microscopy; small interfering RNA; therapeutics; thermogravimetry; transfection; transmission electron microscopy; zeta potential
Abstract:
... Conjugates of poly(amidoamine) (PAMAM) with modified graphene oxide (GO) are attractive nonviral vectors for gene-based cancer therapeutics. GO protects siRNA from enzymatic cleavage and showed reasonable transfection efficiency along with simultaneous benefits of low cost and large scale production. PAMAM is highly effective in siRNA delivery but suffers from high toxicity with poor in vivo effic ...
DOI:
10.1021/acsami.8b03477

25. Synthesis of magnetic mesoporous metal-organic framework-5 for the effective enrichment of malachite green and crystal violet in fish samples

Author:
Zhihui Zhou; Yanqing Fu; Qian Qin; Xin Lu; Xianzhe Shi; Chunxia Zhao; Guowang Xu
Source:
Journal of chromatography 2018 v.1560 pp. 19-25
ISSN:
0021-9673
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; chemical bonding; detection limit; fish; gentian violet; liquid chromatography; magnetism; malachite green; porous media; scanning electron microscopy; surface area; tandem mass spectrometry; thermogravimetry; transmission electron microscopy
Abstract:
... A novel, magnetic and mesoporous Fe3O4@PEI-MOF-5 material was synthesized for the effective enrichment of malachite green (MG) and crystal violet (CV) in fish samples. The Fe3O4@PEI-MOF-5 material was prepared by a facile two-step solvothermal approach in which Fe3O4@PEI and MOF-5 were connected through chemical bonds. Characterization of the newly synthesized Fe3O4@PEI-MOF-5 material was performe ...
DOI:
10.1016/j.chroma.2018.05.016

26. Synthesis of magnetic orderly mesoporous α-Fe2O3 nanocluster derived from MIL-100(Fe) for rapid and efficient arsenic(III,V) removal

Author:
Zhongmin Liu; Jitao Chen; Yongchuan Wu; Yaru Li; Jingyu Zhao; Ping Na
Source:
Journal of hazardous materials 2018 v.343 pp. 304-314
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; active sites; adsorbents; adsorption; arsenic; chemical bonding; hematite; iron; magnetism; models; nanoparticles; porous media; scanning electron microscopy; sorption isotherms; surface area; thermogravimetry; transmission electron microscopy; zeta potential
Abstract:
... A calcination time regulation method has been unprecedentedly used to adjust the orderly meso-structure of novel α-Fe₂O₃ nanoclusters derived from MIL-100(Fe) (MIL: Materials of Institute Lavoisier). The as-synthesized magnetic orderly mesoporous α-Fe₂O₃ nanoclusters were characterized by XRD, SEM, TEM, TGA, N₂ adsorption-desorption isotherms, VSM, Zeta potential, FTIR and XPS. The 6h calcinated α ...
DOI:
10.1016/j.jhazmat.2017.09.047

27. The deactivation of a ZnO doped ZrO₂–SiO₂ catalyst in the conversion of ethanol/acetaldehyde to 1,3-butadiene

Author:
Minhua Zhang; Xuechao Tan; Tong Zhang; Zheng Han; Haoxi Jiang
Source:
RSC advances 2018 v.8 no.59 pp. 34069-34077
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; acetaldehyde; acidity; air; ammonia; carbon; catalysts; chemical bonding; crystal structure; desorption; ethanol; nitrogen; nuclear magnetic resonance spectroscopy; oxidation; scanning electron microscopy; silica; sol-gel processing; stable isotopes; temperature; thermogravimetry; zinc oxide
Abstract:
... A deactivation study on the ethanol/acetaldehyde conversion to 1,3-butadiene over a ZnO promoted ZrO₂–SiO₂ catalyst prepared by a sol–gel method was performed. The samples were characterized by N₂ adsorption–desorption isotherms, scanning electron microscopy (SEM), NH₃ temperature programmed desorption (NH₃-TPD), X-ray powder diffraction characterization (XRD), thermogravimetric analyses (TGA), Fo ...
DOI:
10.1039/c8ra06757k

28. The effect of metallic Fe(ii) and nonmetallic S codoping on the photocatalytic performance of graphitic carbon nitride

Author:
Hailong Dou; Shaohui Zheng; Yongping Zhang
Source:
RSC advances 2018 v.8 no.14 pp. 7558-7568
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; carbon nitride; chemical bonding; electric current; ferrous chloride; graphene; ions; iron; melamine; nanosheets; photocatalysis; photocatalysts; polymerization; surface area; temperature
Abstract:
... The metallic Fe(ii) ion and nonmetallic S codoped g-C₃N₄ photocatalyst was synthesized through the polymerization of melamine, ferrous chloride and trithiocyanuric acid (TCA) at elevated temperature. The performance of Fe(ii)–S codoped g-C₃N₄ compounds in RhB photocatalytic degradation was found to increase 5 times. This significant enhancement in catalytic activity is probably related to the enha ...
DOI:
10.1039/c8ra00056e

29. The effect of stoichiometry on the structural, thermal and electronic properties of thermally decomposed nickel oxide

Author:
P. Dubey; Netram Kaurav; Rupesh S. Devan; G. S. Okram; Y. K. Kuo
Source:
RSC advances 2018 v.8 no.11 pp. 5882-5890
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; chemical bonding; ferrimagnetic materials; magnetism; nickel; nickel oxide; nitrates; oxidation; oxygen; specific heat; stoichiometry; temperature; thermal degradation; thermogravimetry; titration
Abstract:
... A thermal decomposition route with different sintering temperatures was employed to prepare non-stoichiometric nickel oxide (Ni₁₋δO) from Ni(NO₃)₂·6H₂O as a precursor. The non-stoichiometry of samples was then studied chemically by iodometric titration, wherein the concentration of Ni³⁺ determined by chemical analysis, which is increasing with increasing excess of oxygen or reducing the sintering ...
DOI:
10.1039/c8ra00157j

30. Three-dimensional amine-terminated ionic liquid functionalized graphene/Pd composite aerogel as highly efficient and recyclable catalyst for the Suzuki cross-coupling reactions

Author:
Yanli Huang; Qiuli Wei; Yuanyuan Wang; Liyi Dai
Source:
Carbon 2018 v.136 pp. 150-159
ISSN:
0008-6223
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; Suzuki reaction; X-ray diffraction; X-ray photoelectron spectroscopy; aerogels; catalysts; catalytic activity; cations; chemical bonding; graphene; ionic liquids; moieties; particle size; scanning electron microscopy; surface area; transmission electron microscopy
Abstract:
... In this work, three-dimensional (3D) amine-terminated ionic liquid (IL) covalently functionalized graphene/Pd composite aerogels are successfully fabricated via a facile and green reduction-inducing self-assembly method. The morphology and composition of the obtained 3D IL-rGO/Pd composite aerogels are studied by means of TEM, SEM, XRD, FTIR, XPS, BET, and Raman spectroscopy. In those composites, ...
DOI:
10.1016/j.carbon.2018.04.068

31. Vanadium oxide nanoparticles supported on cubic carbon nanoboxes as highly active catalyst precursors for hydrogen storage in MgH₂

Author:
Zeyi Wang; Zhuanghe Ren; Ni Jian; Mingxia Gao; Jianjiang Hu; Fang Du; Hongge Pan; Yongfeng Liu
Source:
Journal of materials chemistry 2018 v.6 no.33 pp. 16177-16185
ISSN:
2050-7496
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; ambient temperature; carbon; catalysts; chemical bonding; dehydrogenation; hydrides; hydrogen; hydrogenation; magnesium; milling; nanoparticles; thermal stability; vanadium
Abstract:
... Magnesium hydride (MgH₂) has attracted intense interest as a high-capacity hydrogen storage material. However, high thermal stability and slow kinetics limit its practical applications. Herein, vanadium oxide nanoparticles supported on cubic carbon nanoboxes (nano-V₂O₃@C) are synthesized successfully by using MIL-47(V) as a precursor, and superior catalytic effects derived from the nano-V₂O₃@C com ...
DOI:
10.1039/c8ta05437a