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Online since: August 2019
Authors: Sira Sarungallo Rosalia, Lewerang Halimaking Wilhelmus, Denny Denny, Hariani Soekamto Nunuk, Taba Paulina
Perintis Kemerdekaan Km. 13, Daya, Makassar, Indonesia 2Department of Chemistry HASANUDDIN UNIVERSITY, Jl.
The method used to analyze the catalyst crystal structure made is X-ray diffraction (XRD).
XRD pattern of the reference mordenite (MOR) structure.
Based on crystallography in unit cells, the structure of the mordenite cage structure is [14]: M)8/n [(AlO2)8 (SiO2)40] 21 H2O atau (M)8/n Al8 Si40 096. 21 H2O (mordenite, M = Na atau Ca) Table 1.
[11] West, A.R., in: Solid State Chemistry and It’s Application, John Willey & Sons, New York (1984)
Online since: January 2007
Authors: Soo Jin Park, Se Hyuk Im, John M. Rhee, Young Seak Lee
Rhee2 , and Young-Seak Lee3 1 Department of Chemistry, Inha Univ., 253, Nam-gu, Incheon 402-751, Korea (South) 2 Department of Advanced Organic Materials Engineering, Chonbuk National Univ., 664-14, Dukjin Ku, Jeonju 561-756, Korea (South) 3 Dept. of Fine Chemical Engineering and Chemistry, Chungnam National Univ., 220, Kung-dong, Yuseong, Daejeon 305-764, Korea (South) *sjpark@inha.ac.kr Keywords: Electrochemical double layer capacitors, polyacrylonitrile, N,N-dimethylformamide, multiwalled carbon nanotubes.
The main advantage of the electrospinning process is that it is a simple means to prepare continuous fibers with unusually large surface to volume ratios and pore structure surfaces.
Online since: January 2012
Authors: Ping Guan, Xiao Ling Hu, Jie Gao, Mei Cao
Structure and Properties of Cobaltous Chloride/Polyvinyl Alcohol-Glutaraldehyde(CC/PVA-GA) Reversible Thermochromic Microcapsule Jie Gao1, 2a, Ping Guan1, 2b, Xiaoling Hu1, 2c, Mei Cao1, 2d 1School of sciences, Northwestern Polytechnical University, Xi’an 710072, China 2The Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education, Xi’an, 710072, China agaojie@dtctri.com.cn, bguanping1113@nwpu.edu.cn(corresponding author), chuxl@nwpu.edu.cn, dcaomei0301@126.com Keywords: microcapsule, reversible thermochromic, cobaltous chloride, polyvinyl alcohol, structure Abstract.
The structure, thermochromic property and solvent resistant of microcapsules were mainly discussed.
Results and Discussion The Characterization of Microcapsules Structure FT-IR of Microcapsules.
This acetal reaction can strengthen its structure and reduce swelling of the wall.
The wall of microcapsules was tight with single-layer structure; the thickness of wall was about 2μm.
Online since: January 2013
Authors: Ning Liu, Rui Yuan Zheng, Bing Li, Xia Zhang, Shi Jiao Liang, Zheng Wang, Wan Yi Liu
Coaled carbon-based solid acid: A new and efficient catalyst for click synthesis of 3,4-dihydropyrimidin-2(1H)-ones under solvent-free conditions Liu wanyi*1, a, Ning Liu, Ruiyuan Zheng, li Bing, Zhang xia, Liang shijiao and Wang zheng 1 School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China aliuwy@nxu.edu.cn,liuwy-1@163.com Keywords: coaled carbon-based solid acid; ultra-low ash Taixi coal; Sulfonation; Biginelli reaction; dihydropyrimidin-2(1H)-ones.
The structure and thermal stability of CCBSAC which resulted from ultra-clean coal resources mainly were characterized by IR, XRD, and TG.
Compared to the carbide before sulphonation, peak at 3-15° of catalyst was disappeared which indicates that the carbon structure has been changed when sulfonic groups were introduced in the sulfonation reaction.
The catalyst materials will have wide application prospects in effective utilization and recycling of the ultra-clean Taixi coal resources and other green chemistry fields, such as, organic synthesis and biomass conversion.
Online since: September 2013
Authors: Jing Yi Yang, Ling Ling Luo, Shu Xian Zhong, Jian Rong Chen, Yu Qiong Chen, Ying Chuan Ma, Xin Zhang
Advances of Graphene for Adsorption of Dyes in Wastewater Jingyi Yang1,a,Yuqiong Chen2,b,Yingchuan Ma1,c,Xin Zhang 1,d, Lingling Luo2,e,Shuxian Zhong2,f,Jianrong Chen 1,g* 1College of geography and environmental sciences, Zhejiang normal university, Jinhua, China 2College of chemistry and life sciences, Zhejiang normal university, Jinhua, China ayjywayward@sina.com, b254302346@qq.com, c313082478@qq.com ,d475339134@qq.com,e334668199@qq.com, fshuxian@zjnu.cn, gcjr@zjnu.cn Keywords: Graphene; Adsorption; Dyes; Abstract.
Graphene is a fascinating new member of carbon materials with honeycomb and one-atom-thick structure, consisting of 2D hexagonal lattices of sp2 carbon atoms covalently bonded.
Because these dyes containing aromatic structure, easily soluble in water, and produces a large number of non-ferrous, toxic and carcinogenic environmental pollutants such as phenolic compounds, and such pollutants not easily removed from the wastewater, and eventually bring serious harm to humans and aquatic organisms [2, 3].
Marek: TrAC trends in analytical chemistry, Vol. 25 (2006), p. 480
Online since: March 2015
Authors: Ai Guo Wu, Q.Z. Ding, Hai Wei Zhang
Introduction Miniaturize Total Analysis systems(uTAS) or Laboratory on a chip(LOC)is the study of this interdisciplinary field,is based on micro-electronic machine-system (MEMS) fabrication technology, which coupled with electronics, material science, analytical chemistry and biochemistry, and integrated analytical process on microchip to make the whole analytical system miniaturized, integrated and portable from sample preparation to detection.[1]MEMS technology is a new emerging technology, which introjects the microelectronic technology and the precision machine machining technology.
About forty years ago,microelectronic technology initiated revolution in the field of information science, and plays the important role in the development of science and technology in the 20century.according the recent development of technology, uTAS based on MEMS will play an important role in analytical science during the following ten years. the loss of precious reagent and biological sample was decreased to microliter or by nanoliter by the uTAS, and the efficiency of chemistry ayalysis showed an hundredfold increase,the cost has hundredfold decreased. uTAS creats condition that Analysis and Testing Technology will been widely available for lots of people, individualizes and family orientation of analysis LAB will been implemented. [2]Microfluidic Analysis is the key component in the uTAS, where various functions of chemical analysis on stamp sized microfluidic chip is the most popular technology of current trend.
Lithography is the technology of micro-making which utilize photoresist, mask and UV light, to optically project massive IC structured graphic from mask to photoresist material coated wafer.
It involves varies of areas for study such as optical, mechanics, electric, and physics, chemistry and material science.
Online since: February 2014
Authors: Erik Janzén, Xun Li, Anne Henry
Homo-epitaxial growth on low-angle off cut 4H-SiC substrate XUN LI1, a, ERIK JANZÉN1,b and ANNE HENRY3,c* 1 Dept. of Physics, Chemistry and Biology, Linköping University, 58183 Linköping, Sweden axunli@ifm.liu.se, berija@ifm.liu.se, canne.henry@liu.se * corresponding author Keywords: epitaxy, CVD, low-off axis, morphology, AFM.
The main goal of this study is to investigate the growth on 1.28º off-cut substrate with standard chemistry.
For standard chemistry silane (SiH4) and a light hydrocarbon as propane (C3H8) or ethylene (C2H4) was used.
However, this approach can be applied for the buffer layers when starting growing the epitaxial device structure whereas the epitaxial growth of the active layer could be done during the same run by increasing the growth rate and the C/Si ratio.
Online since: January 2009
Authors: Hamza Boukhlouf, R. Benrabaa, S. Barama, A. Barama
Barama 2, d 1 Macromolecular Chemistry laboratory, UER-CA, E.M.P, Bordj El-Bahri, Algiers, Algeria 2 Chemistry laboratory of Natural gas, Chemistry Faculty, USTHB, BP32 El Alia, 16111 Bab Ezzouar, Algiers, Algeria a email: boukhloufhamza@gmail.com, b email:rafikemp@gmail.com, c email: Siham_barama@yahoo.com, deamil: a_barama@yahoo.fr Keywords: Ethane, ethylene, oxidative dehydrogenation, molybdenum based catalysts.
Fig. 1: X-ray diffraction patterns (a) and Laser Raman spectra (b) of unsupported and supported catalysts (∆: α-NiMoO4, β: β-NiMoO4, Γ: γ-Al2O3,*: NiAl2O4, Φ: SiO2) The XRD analysis (Fig. 1a), performed at room temperature, showed, for the unsupported and SiO2supported NiMoO4 catalysts, the lines characteristic of the well crystallized α-NiMoO4 phase (Mo in octahedral coordination) with monoclinic structure and lattice constant a = 9.509 Å b = 8.759 Å c = 7.6678 Å.
Online since: October 2010
Authors: Xue Ming Wang, Lan Dong Li, Guang Jun Wu, Nai Jia Guan
Preparation of TiO2 supported gold nano-clusters by photo-deposition Xueming Wanga, Guangjun Wub, Landong Lic and Naijia Guand Key Laboratory of Advanced Energy Materials Chemistry (MOE), College of Chemistry, Nankai University, Tianjin 300071, P.R.
As for catalysis, the Au/TiO2 has been studied as possible catalysts for the selective oxidation of benzyl alcohol to benzaldehyde, a new environmentally benign reaction in synthetic chemistry [25].
Anderson: Structure of Metallic Catalysts (Academic Press, New York 1975) [2] M.
Online since: October 2008
Authors: Marc Bohner, Nicola Döbelin, Manuel Eggimann, Martin Fisch, Tobias J. Brunner, Wendelin J. Stark
Stark2 , Manuel Eggimann3, Martin Fisch3 , Marc Bohner 1 1 RMS Foundation, Bischmattstr. 12, CH-2544 Bettlach, Switzerland 2 Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland 3 Institut für Geologie, Universität Bern, Baltzerstr. 3, CH-3012 Bern, Switzerland a nicola.doebelin@rms-foundation.ch Keywords: amorphous calcium phosphate, α-TCP, nano-powder, in-situ XRD, Ostwald step rule Abstract X-ray amorphous tricalcium-phosphate nanoparticles (ATCP) produced by flame spray synthesis were heat-treated at temperatures between 500 and 1000 °C and analyzed in situ by X-ray powder diffraction.
The particles are single crystals with a coherent crystal structure.
Journal of Materials Chemistry, 2003. 13(4): p. 888-892
Journal of Physical Chemistry, 1984. 88(24): p. 5768-5769