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Online since: September 2014
Authors: Zakaria Man, Hilmi Mukhtar, Dzeti Farhah Mohshim
The membranes for this test were prepared by breaking the membranes under liquid nitrogen temperature in order to avoid destroying the cross-section membrane structure.
Fig. 1 shows the cross-section image of fabricated membrane having almost similar dense structure presented by all membranes which indicate that PES-emim[Tf2N] blend is miscible.
Ford, "Molecular modeling study of the permeability-selectivity trade-off in polymeric and microporous membranes," Industrial & Engineering Chemistry Research, vol. 45, pp. 5640-5648, 2006
Fig. 1 shows the cross-section image of fabricated membrane having almost similar dense structure presented by all membranes which indicate that PES-emim[Tf2N] blend is miscible.
Ford, "Molecular modeling study of the permeability-selectivity trade-off in polymeric and microporous membranes," Industrial & Engineering Chemistry Research, vol. 45, pp. 5640-5648, 2006
Online since: February 2023
Authors: Muhammad Yovinanda Maulana, Ni Luh Wulan Septiani, Siti Nurul Aisyiyah Jenie, Brian Yuliarto
Aisyiyah Jenie2,3,c, Ni Luh Wulan Septiani3,d
1Advanced Functional Material, Department of Engineering Physics, Faculty of Industrial Technology, Institut Teknologi Bandung – ITB, Bandung 40132, Indonesia
2Research Centre for Chemistry, National Research and Innovation Agency – BRIN, Building 452, Kawasan Puspitek, South Tangerang 15314, Indonesia
3BRIN and ITB Collaboration Research Centre for Biosensor and Biodevices, Jl.
The discernible peaks appearing at 30.22o, 35.59o, 43.21o, 53.65o, 57.21o, 62.83o can be assign to (220), (311), (400), (422), (511), and (440) planes of a cubic structure from Fe3O4.
There is no significant change in the crystal structure of Fe3O4 particles before and after SiO2 coating as compared to Fig. 4.
The discernible peaks appearing at 30.22o, 35.59o, 43.21o, 53.65o, 57.21o, 62.83o can be assign to (220), (311), (400), (422), (511), and (440) planes of a cubic structure from Fe3O4.
There is no significant change in the crystal structure of Fe3O4 particles before and after SiO2 coating as compared to Fig. 4.
Online since: November 2007
Authors: Ana Lilia Leal-Cruz, Martin I. Pech-Canul
The effects of supersaturation and temperature on the
structure of CVD materials are indicated in Fig.1.
The effects of supersaturation and temperature on the structure of condensed materials [5].
Weast: in C.R.C Handbook of Chemistry and Physics, 51 st Edit.
The effects of supersaturation and temperature on the structure of condensed materials [5].
Weast: in C.R.C Handbook of Chemistry and Physics, 51 st Edit.
Online since: August 2012
Authors: Jun Li, Ning Ning Wang, Zhan Hua Ma
Preparation of Pt-Sn-K/Al2O3 Catalysts and Its Catalytic Performance in Propane Dehydrogenation
Jun Li1, a, Ningning Wang2,b and Zhanhua Ma2,c
1 Department of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, China
2 Department of Chemical Engineering, China University of Petroleum, Qingdao, China
a upclijun@126.com, bwangning2123@126.com, cmzh_1999@126.com
Keywords: propane; dehydrogenation; catalyst; Pt-Sn-K; propylene
Abstract.
Bertolini, etc, Characterization of bimetallic Pt–Sn/Al2O3 catalysts: Relationship between particle size and structure, J.
Ahn, etc, Location and structure of coke generated over Pt-Sn/Al2O3 in propane dehydrogenation, J.
Bertolini, etc, Characterization of bimetallic Pt–Sn/Al2O3 catalysts: Relationship between particle size and structure, J.
Ahn, etc, Location and structure of coke generated over Pt-Sn/Al2O3 in propane dehydrogenation, J.
Online since: March 2006
Authors: Kai Wang, Guo Mei Liu, Zuo Wan Zhou
Wu et al. demonstrated [7] that V-doped TiO2 possesses better absorption
ability of visible light, and vanadium either substitutes Ti
4+ site or embeds in the vacancy of
TiO2 structure.
Jeffrey et al also pointed out [7] that the 3d orbital of vanadium might change the band gap of titanium dioxide so that the samples enable to absorb visible light, and the X-ray absorption near edge structure analyses of V 5+ doped TiO2 manifest that the chemical status of vanadium co-existed both V 4+ and V 5+, the V 4+ is possible in the octahedral lattice of TiO2, while V 5+ may be highly dispersed within the crystalline of TiO2.
Photochemistry Photobiology A: Chemistry, Vol. 163(2004), p. 509
Jeffrey et al also pointed out [7] that the 3d orbital of vanadium might change the band gap of titanium dioxide so that the samples enable to absorb visible light, and the X-ray absorption near edge structure analyses of V 5+ doped TiO2 manifest that the chemical status of vanadium co-existed both V 4+ and V 5+, the V 4+ is possible in the octahedral lattice of TiO2, while V 5+ may be highly dispersed within the crystalline of TiO2.
Photochemistry Photobiology A: Chemistry, Vol. 163(2004), p. 509
Online since: March 2018
Authors: Abul Kalam Azad, Pg Mohammad Iskandar Petra, Seikh M.H. Rahman, Sten G. Eriksson, Mahendra Rao Somalu, Shahzad Hossain, Abdalla Mohammed Abdalla, Nikdalila Radenahmad
Azad1,h
1Faculty of Integrated Technologies, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong BE 1410, Brunei Darussalam.
2Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
3Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE 1296, Sweden.
The atomic positions in Table 1 were used to conduct Rietveld refinement and the compounds were found to be in Fm-3m space group of cubic structure.
Micro structure of material was observed by SEM using electron as media to reflect the image of micro scale feature.
The atomic positions in Table 1 were used to conduct Rietveld refinement and the compounds were found to be in Fm-3m space group of cubic structure.
Micro structure of material was observed by SEM using electron as media to reflect the image of micro scale feature.
Online since: December 2013
Authors: Stanislav A. Lobanov
Presentation of a problem
Buildings, industrial and civil structures, infrastructure facilities of the residential places are operated under the profoundly time-varying natural conditions.
Fine structure of statistical distributions as a reflection of spatial anisotropy and gravitational heterogeneity of the lower world // Mendeleev Chemistry Journal, 2007, V.
Fine structure of statistical distributions as a reflection of spatial anisotropy and gravitational heterogeneity of the lower world // Mendeleev Chemistry Journal, 2007, V.
Online since: January 2014
Authors: Abdul Rahman Mohd Faizal, Siti Norsyarahah Che Kamarludin, Suffiyana Akhbar, Muhammad Syafiq Jainal
Introduction
Since last two decades, polymer nanocomposites have attract much public attention as a new generation materials because of the advantages and characteristics derived from their unique nanoscale structures which display improvement in physical, mechanical, thermal, electrical, magnetic and optical properties.
Furthermore, the nanoscale structure with high aspect ratio and surface area of the organoclay will increase the contact surface between the silicate layers and the polymer thus, increasing the interaction between them and the strength and stiffness properties are improved.
Carbon nanotube-polymer composites: Chemistry, processing, mechanical and electrical properties, Progress In Polymer Science 2010; 35(3): 357-401
Furthermore, the nanoscale structure with high aspect ratio and surface area of the organoclay will increase the contact surface between the silicate layers and the polymer thus, increasing the interaction between them and the strength and stiffness properties are improved.
Carbon nanotube-polymer composites: Chemistry, processing, mechanical and electrical properties, Progress In Polymer Science 2010; 35(3): 357-401
Online since: January 2015
Authors: Bo Quan Jiang, Xin Dong Mei
Thick Nickel Coating on Surface of Quartz Optical Fiber by
Electrochemical Deposition Method
Xindong Mei1,a and Boquan Jiang2,b
1Chemical Industry School of Jiangxi Province, Nanchang, Jiangxi, 330012;
2Department of Biology and Chemistry, Nanchang University College of Science and Technology, Nanchang,Jiangxi,330029, P.R.China
a429189767@qq.com, bjbq_win@163.com
Keywords: quartz optical fiber, electrochemical deposition, electroless plating, electroplating, Ni, Ni-P
Abstract: Electrochemical deppsition methods (electroless plating and electroplating) were used to deposit a thick nickel on surface of quartz optical fibers.
The coating structure was analyzed by X-ray diffractometer(XRD, Bruker D8, Germany0.
It is seen that two strong diffraction peaks are found at 2θ=33˚( Ni-P crystal) and 2θ=45˚(Ni crystal),respectively, which proves that the Ni-P film has a crystalline structure of Ni-P.
The coating structure was analyzed by X-ray diffractometer(XRD, Bruker D8, Germany0.
It is seen that two strong diffraction peaks are found at 2θ=33˚( Ni-P crystal) and 2θ=45˚(Ni crystal),respectively, which proves that the Ni-P film has a crystalline structure of Ni-P.
Online since: December 2012
Authors: Ya Nan Wang, Qun Long Wang, Huan Hui Chen, Jia Lei Zhang, Zhi Rong Zhu
Formation of Methyl Acrylate from Methyl Acetate and Formaldehyde Condensation over Solid Base Catalysts
Yanan Wanga, Qunlong Wanga, Huanhui Chena, Jialei Zhanga, Zhirong Zhu*
aDepartment of chemistry, Tongji University, 1239.
The crystal structure of the catalysts was studied by X-ray diffraction (XRD) on a Bruker Focus D8 diffract meter with Cu Kα radiation from 10° to 70°.
This indicated that the structure of the support was preserved and no new phase was produced during modification with Cs2O, although relative crystallinity decreased after modification with Cs2O.
The crystal structure of the catalysts was studied by X-ray diffraction (XRD) on a Bruker Focus D8 diffract meter with Cu Kα radiation from 10° to 70°.
This indicated that the structure of the support was preserved and no new phase was produced during modification with Cs2O, although relative crystallinity decreased after modification with Cs2O.