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Online since: February 2021
Authors: Asra Tariq, Iqra Abdul Rashid, Muhammad Fayzan Shakir, Ayesha Afzal
Aniline (Merk Schuchardt, Germany), Dodecyl benzene sulfonic acid (DBSA) (Aldrich chemistry).
Kao, “Synthesis and structure properties of polyurethane based conducting copolymer I. 13C NMR analysis,” Synth.
Online since: November 2015
Authors: Chan Choon Jiat, Tengku Nuraiti Tengku Izhar, Nabilah Aminah Lutpi
The chemical structure of polymers is mainly made of carbon and hydrogen and proves to be highly combustible [3].
Lawson: Recent Developments in the flammability of Elastomeric Materials (Rubber Chemistry and Technology 1986)
Online since: February 2007
Authors: Chang Chun Ge, Qing Zhi Yan, Wen Feng Zhang, Xin Tai Su
According to theory of solid propellent thermal-chemistry [8], the combustion reaction of Ba(NO3)2-TiO(NO3)2-C6H8O7-NH4NO3 system can be written as follows: 0 20 40 60 80 100 120 2θ 400°C • • • 500°C =amorphous carbon •• 600°C 700°C 800°C =BaTiO3 Fig.2 XRD patterns of BaTiO3 powders calcined at different temperature for 2h Table1 Effect of n/c values on characteristics of as-combusted powders Powder characteristics Particle size d (nm) Sample Number Composition (Ba:Ti:CA) Ratio of NO3:CA BET surface area (m 2 /g) dBET DFE-SEM Morphology BT1 1:1:1 2:1 17 58 45 nonagglomerate BT2 1:1:3 3:1 15.5 64 50 nonagglomerate BT3 1:1:3 4.5:1 12.7 78 50 partial agglomerate BT4 1:1:3 6:1 10.2 98 60 partial agglomerate BT5 1:1:3 7:1 7.8 128 65 heave agglomerate 9Ba(NO3)2 +9TiO(NO3)2 +11C6H8O7 +9NH4NO3 →9BaTiO3 +66CO2 +27N2 +62H2O (1) CA is regarded as fuel, while Ba(NO3)2 and TiO(NO3)2 containing NO3 as oxidizer.
On the contrary, when the n/c value was below 4.5, not only the combustion reaction proceeded mildly with lower temperature, but also excess fuel generated more gases that would loosen the formed powder structure, resulting in non-agglomerated powders.
Online since: July 2011
Authors: Yu Chao Tang, Li Hua Tang, Xin Li, Yuan Jun Yao, Li Juan Wang, Xian Huai Huang, Li Ping Xue
Adsorption of Arsenite(III) and Arsenate(V) from Drinking Water Using Amorphous and Anatase Titanium Dioxide as the Adsorbent Yuchao Tang1,2,a*, Xianhuai Huang1,b, Lihua Tang1,2,c, Xin Li 1, Liping Xue1, Yuanjun Yao1, Lijuan Wang1 1 Laboratory of Water Pollution Control and Wastewater Reuse, Department of Environmental Engineering, Anhui University of Architecture, Hefei, 230022, P R China 2 School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, P R China *Corresponding author. a tangyc@aiai.edu.cn, bxhhuang2@gmail.com, ctlh@aiai.edu.cn Keywords: Arsenite(III), Arsenate(V), Adsorption, Titanium dioxide, Drinking water Abstract.
Amorphous TiO2 is expected to have small particle size, disordered surface structure and high surface area, thus making it may effective as an adsorbent. [5] The BET surface specific area of amorphous TiO2 nano-particles was found to be 205 m2/g and anatase TiO2 was 115.6 m2/g, respectively.
Online since: October 2006
Authors: Rick D. Gamble, David Snyder, W.J. Everson, R.L. Cavalero, B.E. Weiland, Ed Oslosky, R.G Ray, Mark A. Fanton
Reduction of impurity concentrations in the boule minimizes the effect of the concentration gradients thereby improving the yield of semi-insulating material required for high frequency device structures such as AlGaN/GaN HEMT's.
[15] CRC Handbook of Chemistry and Physics, CRC Press, Inc., 1990
Online since: October 2011
Authors: Xiao Yu Zhao, Shu Li Liu, Zhong Qiu Cao, Hui Zhang, Ke Zhang
Synthesis of Mg (NH2)2 and hydrogen storage properties of Mg (NH2)2–LiH system Ke Zhang, Xiaoyu Zhao, Shuli Liu, Zhongqiu Cao, and Hui Zhang Life and Chemistry College, Shenyang Normal University, Huanghe Northern Street 253, Shenyang, Liaoning Province, China Email: Zhangke@synu.edu.cn Keywords: Synthesis of Mg (NH2)2, M-N-H hydrogen storage materials, Hydrogen absorption and desorption kinetics, Pressure-composition isotherms (PCI) curves Abstract Mg(NH2)2 was synthesized by first high energy milling MgH2 powder in a 99.995% NH3 atmosphere and then heat treating at 300oC, and hydrogen storage properties of prepared Mg(NH2)2+2.2LiH (molar ratio) had been studied in the temperature range of 150-240oC.
The solid hydrogen materials can be classified into simple metal hydrides [8], metal-hydrogen-other element complexes [9] and others whose surface can physically absorb hydrogen atom or molecules such as zeolites [10], carbon based structures [11] etc.
Online since: January 2012
Authors: Gabriel Ferro, Mikael Syväjärvi, Jean Camassel, Hervé Peyre, Remigijus Vasiliauskas, Jean Lorenzzi, Georgios Zoulis, Sandrine Juillaguet, J.W. Sun, R. Yakimova
Camassel1,j* 1 CNRS, Laboratoire Charles Coulomb UMR 5221, F-34095, Montpellier, France 2 Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden 3 Laboratoire des Multimateriaux et Interfaces, UMR-CNRS 5615, UCB-Lyon1, 43 Bd du 11 nov. 1918, 69622 Villeurbanne, France 4 Université Montpellier 2, Laboratoire Charles Coulomb UMR 5221, F-34095, Montpellier, France a zoulis@ges.univ-montp2.fr, b jiasu@ifm.liu.se, c remis@ifm.liu.se, d jean.lorenzzi@univ-lyon1.fr, e herve.peyre@univ-montp2.fr, f mikael.syvajarvi@ifm.liu.se , g gabriel.ferro@univ-lyon1.fr, h sandrine.juillaguet@univ-montp2.fr, i  roy@ifm.liu.se, j jean.camassel@univ-montp2.fr * corresponding author Keywords: 3C-SiC, Al doping, sublimation epitaxy, Low temperature photoluminescence Abstract.
In low doped semiconductors with a direct band gap structure (like GaN) many recombine radiatively, emitting the so-called signature of free exciton-polariton complexes.
Online since: July 2012
Authors: Jian Hua Yi, Ya Ting Lu, Chao Shi, Cang Xue Luo
In 2004, Lewicki P P et al. [5] investigated the effect of apple varieties on cell structure, nutrition ingredient and explosion puffing apple slices quality.
Analytical reagents, including concentrated sulfuric acid, boric acid, glucose, nitric acid and anhydrous ethanol, were purchased from chemistry reagent plant of Xian, China.
Online since: May 2011
Authors: Xue Kui Wang, Zuo Liang Sha, Chang Shu
CFD Simulation on Solid Suspension with Continuous Operation Chang Shu a, Xuekui Wang b, Zuoliang Shac Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin 300457, P.R.
There are still some issues for further study: (1) Decrease the amount eddies to avoid unnecessary energy dissipation; (2) Optimize the configuration of crystallizer, e.g. shape of impellers, dimension of DTB, structure of baffles, etc
Online since: May 2011
Authors: Yan Hong Sun, Hong Hua Zhou, Yu Qing Gu, Ao Min Tang, Chen Min Liao, Bo He Jin Tang, Jia Chang Zhao, Jing Li Xu
The effect of support on the electrochemical performance of composite electrode materials for supercapacitor Yanhong Sun1 , Jiachang Zhao1, Honghua Zhou1, Bohejin Tang1, Yuqing Gu1, Aomin Tang1, Chenmin Liao1, and Jingli Xu1,a 1College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China a xujingli@sues.edu.cn Keywords: supercapacitor, support, composite electrode materials, electrochemical performance Abstract.
Results and discussion Fig. 1 XRD of the samples Fig. 2 cyclic voltammograms of the samples The crystal structure was determined by X-ray diffraction (XRD) measurements.