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Online since: December 2012
Authors: Ying Liu, Xiao Yu Sui, Chun Sheng Pang, Lu Lin, Jun Ping Zhuang
Characterization of ZSM-5 during Conversion of Glucose to Levulinic Acid Ying Liu*1,2, a, Lu Lin3,b, Xiaoyu Sui1,c, Junping Zhuang1,d, Chunsheng Pang1, e 1State Key Laboratory of Pulp and Paper Engineering, College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, Guangdong Province, China 2Key Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, Guangdong Province, China 3Xiamen University, School of Energy Research, Xiamen 361005, Fujian Province, China aamyliu@scut.edu.cn, blclulin@scut.edu.cn, cxysui@scut.edu.cn, djpzhuang@scut.edu.cn, echshpang@scut.edu.cn Keywords: ZSM-5, Characterization, Glucose, Levulinic acid.
Molecular structure of catalyst was analyzed by XRD (D/max-IIIA, Japan) and XPS (Kratos AXis Ultra, British).
The characteristic diffraction peaks of ZSM-5 did not appear after reaction, indicating the crystal structure of ZSM-5 had not been destroyed.
Online since: May 2011
Authors: Xue Qiang Cao, Ling Zhu, Dao Wu Yang
Facile Synthesis of Monodisperse KY3F10 Nanospheres Ling Zhua, Xueqiang Caob and Daowu Yangc Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410114, Hunan, China azhulingster@gmail.com, bxcao@ciac.jl.cn, cdaowuy@163.com Keywords: KY3F10; Aqueous solution; Nanosphere; Abstract.
Results and discussion Structure and morphology control of the nanocrystal.
It is intriguing to note that KY3F10 nanoparticles can self-aggregate into the spherical structure in the absence of any specific ionic additives, biological macromolecules, or synthetic organic templates.
Acknowledgements Financial support from the National Natural Science Foundation of China (21001017), Startup Fund for Doctoral Program, Huxiang Scholars Program, State Key Laboratory of Rare Earth Resource Utilization (Changchun Institute of Applied Chemistry, Chinese Academy of Science) (RERU2011018) and Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation (2011CL02) (Changsha University of Science & Technology) are gratefully acknowledged.
Online since: January 2010
Authors: Sukon Phanichphant, Pusit Pookmanee, Issara Attaveerapat, Jiraporn Kittikul
Effect of pH on Zinc Oxide Powder Prepared by a Chemical Co-precipitation Method Pusit Pookmanee1,a , Issara Attaveerapat1,b , Jiraporn Kitikul1,c and Sukon Phanichphant2,d 1 Department of Chemistry, Faculty of Science, Maejo University, Chiang Mai, Thailand 2 NANOTEC Center of Excellence, Chiang Mai University, Chiang Mai 50200, Thailand a pusit@mju.ac.th, bissaraattaveerapat@yahoo.com, ckitikul_j@hotmail.com, d sphanichphant@yahoo.com Keywords: Zinc oxide, chemical co-precipitation method, XRD, SEM, EDXS Abstract.
The effect of different pH of final solution on the structure and morphology of ZnO powder have been examined.
Confirmation structure of ZnO powder was obtained by comparison with the Joint Committee on Powder Diffraction Standards (JCPDS) Card File No. 01-075-0576 [12].
Acknowledgements The authors would like to thank the financial support from the Department of Chemistry, Faculty of Science, Maejo University, Chiang Mai, Thailand, the National Research Council of Thailand (NRCT), the Research Project for Undergraduate Students (RPUS) with grant RPUS-R52D13006.
Online since: September 2005
Authors: A.K. Ivanov-Schitz, G.N. Mazo, S.N. Savvin
The parent layered La2CuO4 crystal structure has been shown to give rise to a strong anisotropy of oxygen diffusion coefficient in the lattice.
The evolution of electrical transport properties was explained by the changes in electronic structure of the material.
Crystal Structure of La2-xSrxCuO4-δδδδ The high-temperature phase of La2CuO4+δ possesses the body-centered tetragonal K2NiF4-like structure (Fig. 1), which can be pictured as an intergrowth of the perovskite and the rock salt slabs.
These observations emphasize a close interrelation between the lattice effects and defect chemistry of La2-xSrxCuO4-δ.
Simulation Techniques Molecular dynamics simulations have become a common tool in computational chemistry since the late 1950's when it were first introduced by Alder and Wainwright [25,26] to study the systems of hard spheres.
Online since: October 2010
Authors: Jun Zhao, J.J. Xi, Pei Nian Wu, Wei Wang
The excellent morphology of ceramic coating is dense smooth film-like structure of the whole.
Introduction Micro-arc oxidation is a method that puts Al, Mg, Ti and other valve metal or its' alloy placed in electrolyte solution, uses electrochemical method, produces spark discharge spots in the surface of micro-porous, with the thermal chemistry, plasma chemistry and electrochemistry working together, to produce ceramic coating [1-3].
It needs to promote dense layer grown actually that has very compact structure, low porosity, higher wear resistance.
Online since: January 2013
Authors: Lian Ying An, Xiao Qing Chen, Xian Jiang Huang, Xian Yin Zhao
Preparation of Ammonium Tungstophosphate-Calcium Alginate Composite Adsorbent and its Adsorption properties of rubidium Xianjiang Huang1,a , Lianying An1,2,b,* , Xianyin Zhao1,2,c, Xiaoqing Chen1,d 1College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, P.
China 2Mineral Resources Chemistry Key Laboratory of the Higher Education Institutions of Sichuan Province, Chengdu 610059, P.
The composite adsorbent was characterized by XRD, FT-IR and TG-DTG-DTA, it proves that the crystal structure of AWP isn’t destroyed and the adsorption ability of the composite adsorbent can be retained up to 120°C.
The two figures indicate that the crystal structure of ammonium tungstophosphate is not destroyed and no chemical reactions happen between ammonium tungstophosphate and calcium alginate.
Online since: August 2011
Authors: Shu Ai Chen, Jing Kun Xu, Dan Hua Zhu, Xue Min Duan
Synthesis and Properties of Poly(3,4-ethylenedioxythiophene) via Solid-state Polymerization Shuai Chen1, a, Jingkun Xu1,b, *, Danhua Zhu1,c and Xuemin Duan2,d, * 1 Jiangxi Key Lab of Organic Chemistry, Jiangxi Science & Technology Normal University, Nanchang 330013, China 2 School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, China achenshuai200803@yeah.net, bxujingkun@tsinghua.org.cn, czhudanhua2010@yahoo.com.cn, dduanxuemin@126.com *corresponding author Keywords: conducting polymer, solid-state polymerization, PEDOT.
The resulting iodine-doped PEDOT is completely insoluble in common organic solvents and retained partial crystal structure of monomer as indicated by scanning electron microscopy.
Introduction Since its discovery in the late 1970s, conducting polymer has been a fast-growing fi{TTP}-1279 eld in materials chemistry due to scientifi{TTP}-1279 c interest and potential commercial applications [1,2].
This case can be attributed to the slowly polymerization rate of diiodo monomer which could lead to the formation of polymer with relatively regular structure.
Online since: October 2014
Authors: Xuan Tang, Kui Zhou, Yan Bai, Cun She Zhang
A New Technological Study on Synthesis of Bis(2-chloroethoxy)methane Yan Bai1,a,Xuan Tang2,b, Kui Zhou1,c, Cunshe Zhang1,d 1Shaanxi Research Design Institute of Petroleum and Chemical Industry, Shaanxi Key Laboratory of Petroleum Fine Chemicals, XiYan Road No. 61, Xi'an 710054, Shaanxi, China; 2College of Chemistry and Chemical Engineering; Xi'an Shiyou University, Xi'an 710065, Shaanxi, China abaiyanweinan@163.com,btangxuan@xsyu.edu.cn, czhoukui0710@163.com, dzhang@hkcbw.com Keywords: Ethylene chlorohydrin; Oligopolyformaldehyde; Synthesis; New Technology Abstract. bis(2-chloroethoxy)methane was synthesized by the reaction of ethylene chlorohydrin and Oligopolyformaldehyde under sulfuric acid catalysis. optimum reaction conditions obtained were as follows: the molar ratio of Oligopolyformaldehyde and ethylene chlorohydrin of 1.2:2, catalyst dosage was 5‰mass fraction of ethylene chlorohydrin, toluene were chose as water-carrying agent, All reactant were refluxed on temperature
The structure of bis(2-chloroethoxy)methane were conformed by ATR IR.
The processing steps of wastewater containing formaldehyde can be omitted, this innovation conforms the development trendncy of green chemistry.
At last, Pure bis(2-chloroethoxy)methane were obtained by rectification. 2.3 the characteristic of bis(2-chloroethoxy)methane The structure of bis(2-chloroethoxy)methane is confirmed by VECTOR-22 infrared spectrometer(BRUKER AXS).
Online since: August 2013
Authors: Yue Hai Song, Li Jie Ma
Structure and Properties of CNT-PbO2 Anodes on Stainless Steel Yuehai Songa, Lijie Mab School of Environment and Materials Engineering, YanTai University, 32 Qingquan Lu, Laishan District, Yantai 264005, China asyuehai@126.com, bmljkang@163.com Keywords: CNT- PbO2 film; Stainless steel; Electrocatalytic; Co-deposition Abstract.
The attractive properties of electrode compared with other DSAs are high activity and oxygen-overvoltage, compact film structure, and low cost.
The Cyclic voltammograms of CNT-PbO2 on stainless steel in 0.5M H2SO4 at a scan rate of 100 mV/s 3.2 Structure of the films Fig. 2 shows the SEM images of PbO2 (a) and CNT-PbO2 (b) films on stainless steel.
Electroanalytical Chemistry.
Electroanalytical Chemistry.
Online since: July 2013
Authors: Yasunori Ikeda, Tatsuo Fujii, Jun Takada, Makoto Nakanishi, Tohru Yamasaki, Takeyuki Kikuchi, Tatsuya Nakamura, Shinji Yoshida
Introduction Hexaferrite is a group of ferromagnetic iron oxides with hexagonal structures.
Crystal structure of hexaferrites can be built up from the stacking of three basic structural blocks: S (spinel), R (Ba,Sr)Fe6O11, and T (Ba,Sr)2Fe8O14.
It is seemed that the site preference of Zn2+ in U-type structure is different from that of Co2+.
The M-type structure is completely included in the U-type structure.
It is speculated that the magnetic transition to spiral spin structure of Sr4Zn2U shifted to lower temperature (below 300 K).