Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: October 2013
Authors: Václav Švorčík, Petr Slepička, Jakub Siegel, Zdeňka Kolská
X–ray Photoelectron Spectroscopy (XPS), Fourier Transform Infrared Spectroscopy (FTIR) and Electrokinetic Analysis (EA, zeta potential) were used for the characterization of surface chemistry of the modified PET.
Results and discussion Chemical structure of plasma modified and grafted surface.
This can be explained by the “etching“ of low mass oxidized structures (LMWOS) [16]).
Chemical structure of the modified PET films is expected to influence substantially theirs elektrokinetic potential.
Švorčík, Nano-structuring of PTFE surface by plasma treatment, etching, and sputtering with gold, J.
Results and discussion Chemical structure of plasma modified and grafted surface.
This can be explained by the “etching“ of low mass oxidized structures (LMWOS) [16]).
Chemical structure of the modified PET films is expected to influence substantially theirs elektrokinetic potential.
Švorčík, Nano-structuring of PTFE surface by plasma treatment, etching, and sputtering with gold, J.
Online since: September 2019
Authors: Polina Bespalova, Maxim Mishin, Gennady Konstantinovich Baryshev, Anastasia Kondrateva
The structure and chemical composition were analyzed and then correlated with electrochemical response and transmittance modulation when immersed in 1 M KOH electrolyte.
Kuzminov, Coloring of oxide crystals as a characteristic of the defect structure, Trudy IOF im.
Ultrathin undoped tetrahedral amorphous carbon films: The role of the underlying titanium layer on the electronic structure, Diamond and Related Materials. 57 (2015) 43-52
Gas-sensitive properties of thin nickel oxide films, Russian Journal of Applied Chemistry. 90 (2017) P. 846-852
Volkova, Potential-pH diagram for a Nickel-Water system containing nickel (III) metahydroxide, Russian Journal of Applied Chemistry. 82 (2009) 1398-1400
Kuzminov, Coloring of oxide crystals as a characteristic of the defect structure, Trudy IOF im.
Ultrathin undoped tetrahedral amorphous carbon films: The role of the underlying titanium layer on the electronic structure, Diamond and Related Materials. 57 (2015) 43-52
Gas-sensitive properties of thin nickel oxide films, Russian Journal of Applied Chemistry. 90 (2017) P. 846-852
Volkova, Potential-pH diagram for a Nickel-Water system containing nickel (III) metahydroxide, Russian Journal of Applied Chemistry. 82 (2009) 1398-1400
Online since: October 2017
Authors: Pinsuda Viravathana, Piyasak Akcaboot, Napat Kanokpornwasin, Monthida Raoarun, Patraporn Saiwattanasuk
Co-Promoted Cu/ZnO Catalysts for Fischer-Tropsch Synthesis
Piyasak Akcaboot1,a, Napat Kanokpornwasin1,b, Monthida Raoarun1,c, Patraporn Saiwattanasuk1,d and Pinsuda Viravathana1,2,e
1Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
2Center of Advanced Studies in Tropical Natural Resources, National Research University, Kasetsart University, Bangkok 10900, Thailand
apiyasak.doa@gmail.com, bboatman.bnk@gmail.com, cfscimtr@ku.ac.th, dfsciprss@ku.ac.th, e*fscipdv@ku.ac.th
Keywords: Methanol, Syngas, Fischer-Tropsch Synthesis.
All catalysts were prepared by the co-precipitation method, having the mass ratio of Co:Cu:Zn=0 (unpromoted), 0.05, 0.5:1:1, and characterized by X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS), including X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS).
All precalcined, calcined, reduced, and used catalysts were studied using X-ray absorption spectroscopy (XAS), including X-ray absorption near edge structures (XANES) and extended X-ray absorption fine structures (EXAFS) at the XAS beamline (BL-8) of Synchrotron Light Research Institute (Public Organization), Nakhon Ratchasima, Thailand.
The information on the oxidation state of metal and its local structure was also presented.
Acknowledgement The authors would like to thank all supports from Department of Chemistry, Faculty of Science, Kasetsart University Research and Development Institute (KURDI), Center of Advanced Studies in Tropical Natural Resources, National Research University, and Graduate School at Kasetsart University.
All catalysts were prepared by the co-precipitation method, having the mass ratio of Co:Cu:Zn=0 (unpromoted), 0.05, 0.5:1:1, and characterized by X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS), including X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS).
All precalcined, calcined, reduced, and used catalysts were studied using X-ray absorption spectroscopy (XAS), including X-ray absorption near edge structures (XANES) and extended X-ray absorption fine structures (EXAFS) at the XAS beamline (BL-8) of Synchrotron Light Research Institute (Public Organization), Nakhon Ratchasima, Thailand.
The information on the oxidation state of metal and its local structure was also presented.
Acknowledgement The authors would like to thank all supports from Department of Chemistry, Faculty of Science, Kasetsart University Research and Development Institute (KURDI), Center of Advanced Studies in Tropical Natural Resources, National Research University, and Graduate School at Kasetsart University.
Online since: September 2011
Authors: Mei Niu, Hai Bin Fan, Wen Sheng Hou, Jin Ming Dai, Zi Lu Wu, Sheng Shi
The MWNTs-OH/PET composite fibers were prepared by the masterbatch melt blending spinning drawing one-step process (FDY), and the structure and properties of different contents of MWNTs-OH of the PET FDY fiber were studied.
Also, the MWNTs-OH/PET composite fibers were prepared by the masterbatch melt blending spinning drawing one-step process (FDY) and the structure and properties of different contents of MWNTs-OH of the PET FDY fiber were analyzed in detail.
Fig.1 The sketch of MWNTs modified by TPA Fig. 2 The preparation flow sheet of the MWNTs/PET FDY composite fiber Results and discussion The morphology structure of MWNTs-OH/PET fiber In fig. 3, it can be seen that the dispersion of MWNT-OH is good, and the interface between MWNTs-OH and PET matrix has no interfacial cracks and faults.
The reason is that delocalization of π-electron cloud and the benzene ring structure of PET molecular, which made the polymers with aromatic ring structures to be adsorbed on the surface of MWNTs-OH [6], enhancing the interface interaction.
Polymer chemistry [M].Beijing: China Textile Industry Publishing House. 1988 in Chinese [6] Z.
Also, the MWNTs-OH/PET composite fibers were prepared by the masterbatch melt blending spinning drawing one-step process (FDY) and the structure and properties of different contents of MWNTs-OH of the PET FDY fiber were analyzed in detail.
Fig.1 The sketch of MWNTs modified by TPA Fig. 2 The preparation flow sheet of the MWNTs/PET FDY composite fiber Results and discussion The morphology structure of MWNTs-OH/PET fiber In fig. 3, it can be seen that the dispersion of MWNT-OH is good, and the interface between MWNTs-OH and PET matrix has no interfacial cracks and faults.
The reason is that delocalization of π-electron cloud and the benzene ring structure of PET molecular, which made the polymers with aromatic ring structures to be adsorbed on the surface of MWNTs-OH [6], enhancing the interface interaction.
Polymer chemistry [M].Beijing: China Textile Industry Publishing House. 1988 in Chinese [6] Z.
Online since: December 2014
Authors: Hai Rong Zhang, Hong Yan Liu, Pei Wan Bai, Xun Tao, Yu Jiang, Shen Hua Han, Bo Wang, Wen Shang Zhang, Kai Yuan, Yong Guo
College of Chemistry and Chemical Engineering, Institute of Applied Chemistry, Shanxi Datong University, Datong 037009, P.
SAPO-34 is normally synthesized using a hydrothermal method from a gel that includes an alumina source, a silica source, a phosphorous source and at least one organic structure directing agent.
The strong peak (100) directly indicates the presence of MCM-41 structure, and the broad peak has been attributed to the broadening effects of higher reflection lines due to small particles.
SAPO-34 is normally synthesized using a hydrothermal method from a gel that includes an alumina source, a silica source, a phosphorous source and at least one organic structure directing agent.
The strong peak (100) directly indicates the presence of MCM-41 structure, and the broad peak has been attributed to the broadening effects of higher reflection lines due to small particles.
Online since: October 2012
Authors: Shanmugam Anandhavelu, Sivalingam Thambidurai
Preparation of chitosan-ZnO nanocomposite from chitin polymer
Shanmugam Anandhavelu 1, a and Sivalingam Thambidurai 1, a*
1Department of Industrial Chemistry, Alagappa University, Karaikudi-630 003, Tamilnadu, India.
1, a email : sranandhaveluchem@gmail.com (S.Anandhavelu)
1, a* email: sthambi01@yahoo.co.in (S.Thambidurai)
Keywords: Chitin biopolymer, Chitosan-ZnO, SEM, TEM.
The nano-sized ZnO particles are of a hexagonal structure and all the diffraction peaks can be well indexed to the hexagonal phase ZnO reported in JCPDS card (No. 36-1451, a = 0.3249 nm, c = 0.5206 nm).
Sample I show that the surface morphology was observed the number particle with small number rod like structure is obtained (Fig.4a).Sample II show that agglomeration of particle and some small rod is obtained (Fig.4b).
Journal of Material Chemistry, 9, (1999) 2871–2878
The nano-sized ZnO particles are of a hexagonal structure and all the diffraction peaks can be well indexed to the hexagonal phase ZnO reported in JCPDS card (No. 36-1451, a = 0.3249 nm, c = 0.5206 nm).
Sample I show that the surface morphology was observed the number particle with small number rod like structure is obtained (Fig.4a).Sample II show that agglomeration of particle and some small rod is obtained (Fig.4b).
Journal of Material Chemistry, 9, (1999) 2871–2878
Online since: October 2012
Authors: Hai Yun Jiang, Ruo Mei Wu, Wei Li Zhang, Qi Long Liu, Wei Weng
Introduction
Polylactide (PLA) is the front runner in the emerging bioplastics market with the best availability and the most attractive cost structure[1].
Vos, in:Poly (lactic acid): Synthesis, Structures, Properties, Processing, and Applications, edited by R.
Tsuji, volume 6 of Chemistry and production of Lactic Acid , Lactide, and Poly(Lactic Acid), John Wiley & Sons, Inc. (2010)
Ruan: Frontiers of Chemistry in China Vol.4 (2009) p.259 [3] Y.
Vos, in:Poly (lactic acid): Synthesis, Structures, Properties, Processing, and Applications, edited by R.
Tsuji, volume 6 of Chemistry and production of Lactic Acid , Lactide, and Poly(Lactic Acid), John Wiley & Sons, Inc. (2010)
Ruan: Frontiers of Chemistry in China Vol.4 (2009) p.259 [3] Y.
Online since: November 2014
Authors: Yue Long Liu, Jia Liu
Study on the Viscosity and Dispersion Stability of AA-AMPS Copolymer on Nano Zinc Oxide
Yue-Long LIU1,a,* and Jia LIU2,b
1School of Chemistry and Chemical Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, China;
2 Department of Mechanical and Electrical Engineering, Nanchang Institute of Technology, Nanchang330099, China
alylgyx@163.com, b704604371@qq.com
*Corresponding author
Keywords: AA-AMPS copolymer; Radical polymerization; Viscosity; Dispersant.
Anti-scale chemicals involve the inhibition of crystal growth by retarding the nucleation and weakening the tenacity of the scale thus distorting the crystal structure.
These polyelectrolyte adsorption is highly dependent on the electrostatic interactions between the polyelectrolyte and the surface [3], hence, the surface chemistry of the solid phase and the solution properties of the polyelectrolyte are important parameters, regulated by the pH and the ionic strength.
Because the molecular structure of 2-acrylamido-2-methyl propane sulfonic acid (AMPS) [4] contains unsaturated double bonds, sulfonic acid groups and amide groups, which result in its beneficial properties, the unsaturated double bonds in AMPS make it easy to polymerize, the sulfonic acid groups can prevent the hydrophilic copolymer from reacting with ions in solution and also have a chelating effect, and the amide groups help AMPS to have a good hydrolytic and thermal stability.
Anti-scale chemicals involve the inhibition of crystal growth by retarding the nucleation and weakening the tenacity of the scale thus distorting the crystal structure.
These polyelectrolyte adsorption is highly dependent on the electrostatic interactions between the polyelectrolyte and the surface [3], hence, the surface chemistry of the solid phase and the solution properties of the polyelectrolyte are important parameters, regulated by the pH and the ionic strength.
Because the molecular structure of 2-acrylamido-2-methyl propane sulfonic acid (AMPS) [4] contains unsaturated double bonds, sulfonic acid groups and amide groups, which result in its beneficial properties, the unsaturated double bonds in AMPS make it easy to polymerize, the sulfonic acid groups can prevent the hydrophilic copolymer from reacting with ions in solution and also have a chelating effect, and the amide groups help AMPS to have a good hydrolytic and thermal stability.
Online since: October 2012
Authors: A. Stephen, L. Vijayalakshmi, V. Narayanan, K. Giribabu, R. Manigandan, Suresh Ranganathan
Narayanan1f*
1a,b,c,fDepartment of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai 600025 Tamil Nadu, India
2dCSI Ewart Women’s Christian College, Melrosapuram, Kancheepuram 603204
Tamil Nadu, India
3eDepartment of Nuclear Physics, University of Madras, Guindy Campus, Chennai 600025
Tamil Nadu, India
armaniunom@gmail.com, bsureshinorg@gmail.com, cvigneshgiribabu@gmail.com, dlvnviji53@yahoo.in, estephen_arum@hatmail.com, f*vnnara@yahoo.co.in
Keywords: Nanocomposites, electrochemical sensor, hydrogen peroxide, single pot method.
The crystal structure of Fe nanocomposites was analyzed by a Rich Siefert 3000 diffractometer with Cu-Kα1 radiation (λ = 1.5406 Å).
Alsmeyer, “Doped glassy carbon materials (DGC): low-temperature synthesis, structure, and catalytic behavior,” Journal of the American Chemical Society, 112 (1990) 4954–4956
Hirono, “Characterization of platinum nanoparticle-embedded carbon film electrode and its detection of hydrogen peroxide,” Analytical Chemistry, 75 (2003) 2080-2085
The crystal structure of Fe nanocomposites was analyzed by a Rich Siefert 3000 diffractometer with Cu-Kα1 radiation (λ = 1.5406 Å).
Alsmeyer, “Doped glassy carbon materials (DGC): low-temperature synthesis, structure, and catalytic behavior,” Journal of the American Chemical Society, 112 (1990) 4954–4956
Hirono, “Characterization of platinum nanoparticle-embedded carbon film electrode and its detection of hydrogen peroxide,” Analytical Chemistry, 75 (2003) 2080-2085
Online since: September 2011
Authors: Xia Lei Ye, Guo Han Liu, Yu Zhe Song, Gen Liang Han, Qi Hai Lu, Bin Liu, Yun Fu Wang, Gon Gong Li
The crystal structures of products were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM).
The structures of the final products were characterized by XRD.
The results demonstrate that the hollow structures could enhance the gas response property.
Fu, Journal of Materials Chemistry, 16, 1794-1797. (2006) [7] L.N.
Thomas, Chemistry of Materials, 18, 3808-3812. (2006) [9] N.A.
The structures of the final products were characterized by XRD.
The results demonstrate that the hollow structures could enhance the gas response property.
Fu, Journal of Materials Chemistry, 16, 1794-1797. (2006) [7] L.N.
Thomas, Chemistry of Materials, 18, 3808-3812. (2006) [9] N.A.