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Online since: July 2011
Authors: Lin Yan Jia, Yan Wen Tian, Zhong Bao Shao
A new method named high temperature ball milling method was invented [7], which is based on the mechano-chemistry method.
XRD pattern of phosphors prepared at different temperature a:500℃ b: 600℃ c:650℃ d:700℃ e:750℃ From the XRD pattern shown in Fig. 1, the structure of YBO3 belongs to hexagonal system, with space group P63.
So the doped Eu3+ had little influence on the host structure.
The structure of samples with different doping concentration of Eu3+ ions were the same, the position and intensity of peaks are not obviously changed.
The structure of YBO3 has been distorted when Y3+ ions are replaced by Eu3+ ions, because the ionic radius of Eu3+ ions (0.107nm) is larger than Y3+ ions (0.102nm).
Online since: December 2013
Authors: Guo Dong Li, Shi Zhao Kang, Xiang Qing Li, Jin Mu, Zhen Hong, Li Xia Qin
Photocatalytic Degradation Activity of TiO2 Nanotubes for Cr(VI) LI Xiang Qing1,a, HONG Zhen1,b, KANG Shi Zhao1,c, QIN Li Xia1,d, LI Guo Dong2,e, MU Jin1,f* 1 School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, China 2 State Key Laboratory of Inorganic Synthesis Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China axqli@sit.edu.cn, b920813002@qq.com, ckangsz@sit.edu.cn, dlxqin@sit.edu.cn, elgd@jlu.edu.cn, fmujin@sit.edu.cn Keywords: TiO2 nanotubes; photocatalytic; degradation; Cr(VI) solution Abstract.
Compared to TiO2 nanoparticles, TiO2 nanotubes possess large aspect ratio, tubular structure and specific area, which could effectively adsorb contaminant and restrict reverse reaction of photo-generation electron and hole.
However, being calcined beyond 350°C, the lamellar structure collapses, and the nanotubes transform to nanorods [10].
The main diffraction peaks for the samples calcined below 350 °C are located at 2θ = 24.6° and 48.7°, which correspond to the (110) and (020) crystal planes of titanate with lamellar structure.
Combined with the results of XRD and our previous report [10], it may be attributed to the suitable crystal structure and the uniform tubular morphology of the product when the calcination temperature is 350 °C.
Online since: June 2012
Authors: Xiao Qiao Wan, Fang Zhao, Ze Hua Yu, Ying Zhao
Dyeing Properties of Cyanoethylated Wood with Disperse Dyes Xiaoqiao Wan1, Fang Zhao2, Zehua Yu3, and Ying Zhao4* The Institute of Applied Chemistry, Central South University of Forestry & Technology, Changsha, 410004, P.R.China 894552574@qq.com1, huhu614@163.com2, yuzeh1988@sina.com3, zhaoying42@sohu.com4 *Corresponding authors:Ying Zhao Keywords: Cyanoethylated wood, Dyeing, Disperse dye, Color shade Abstract.
Disperse Red 54,177, and disperse Blue 79,148, and disperse Yellow 114,163 (chemical structures are listed in Fig.1) were supplied by Zhejiang Runtu Co.Ltd in China.
The chemical structures of six disperse dyes: Disperse R54 Disperse B79 Disperse Y163 Disperse R177 Disperse B148 Disperse Y114 Fig.1 The chemical structures of six kinds of disperse dyes Results and discussion Dyeing of cyanoethylated fir powder with 6 disperse dyes.
The micporous collapse and the porous structure is damaged.
[5] Q.Y.Yu: Progress in Chemistry,Vol. 8(1996), p.34(In Chinese)
Online since: April 2014
Authors: Hong Wang, Ming Tian Li, Yue Lu, Di Liu
Preparation and Thermal Stability of Pyrrole and m-toluidine Copolymer / Montmorillonite Composites Hong Wang1, a, Mingtian Li1,b, Yue Lu1,c and Di Liu2,d 1 Key Laboratory of Material Corrosion & Protection of Sichuan Province, Department of Materials & Chemical Engineering, Sichuan University of Science & Engineering, Zigong, 643000, China 2College of Chemistry Chemistry, Jilin University, Changchun 130012, China; ajluhong999@163.com, blimingtian01@aliyun.com, cluyuepolymer@126.com, dliudi_student@yahoo.cn Keywords: Pyrrole and m-toluidine Copolymer, Montmorillonite, Thermal property, Abstract.
The effect of MMT contents on the morphology and structure of the composites were characterized by XRD, SEM and FTIR.
Moreover, to study the influences of the concentration of MMT on the morphology, structure, and properties of the products, P(PY/MT)-MMT was prepared under the same conditions without MMT powder.
In Fig. 1a, the broad diffraction in the 2θ were obtained in the range of 18.0° to 28.0° for P(PY/MT) which suggests the structure of pure P(PY/MT) to be amorphous.
These weight losses suggest that the thermal stability of the P(PY/MT)-MMT nanocomposites is enhanced because of the barrier effect of the clay layer structure and from the interactions between P(PY/MT) and MMT.
Online since: September 2013
Authors: Qian Cheng Zhao, Zhi Bo Li, Yan Xia Qi, Hai Jiao Zuo, Tian Wang
Many marine invertebrates are plentiful sources of sphingolipids, in particular, cerebrosides, which differ in structures and biological properties from analogous glycosphingolipids of the terrestrial origin [2].
Kawatake et al. [7] extracted six cerebroside components from the Luidia maculata, and identified their structures.
The number of N was 1-2 and the number of O was above 8 in the structure of cerebrosides.
The structure of cerebrosides was determined containing O-H, C-H, C=O, N-H, -CH2-, C-O and long aliphatic chain.
Stonika: Russian Chemical Bulletin Vol. 55, No.5, p. 928-933 [3] Xiaojun Liu, Wutong Wu: Pharmaceutical Biotechnology, In Chinese, Vol. 23, No.3 (1995), p. 19-23 [4] Zengqi Liu, Tao Jing.: Tianjin Medicine, In Chinese, Vol.15, No.4, (2003), p. 64-67 [5] Yisu Sang, Zhida Min: Chinese Journal of Biochemical Pharmaceutics, In Chinese, Vol.21, No.4 (2000), 211-213 [6] Yingtao Lv, Congmin Kang, Changhu Xue: Food Science, In Chinese, Vol.30, No.11 (2009), p. 26-28 [7] Yamada K, Sasaki K, Harada R, et a1.: Chemical&Pharmaceutical Bulletin Vol.50 (2002), p. 1467-1470 [8] Jin WZ, Kenneth LR, Elizabeth A: J Org Chem Vol.59 (1994), p. 144-147 [9] Fatttorusso E, Mangoni A: Progress in the chemistry of natural products, edtied by Springer Wien, New York, No.72 (1997), p. 215-301 [10] Natori T, Morita M, Akimoto K, et al.: Tetrahedron Vol.50, No.9 (1994), p. 2771-2784 [11] Wang LP, Wang T, Fehr W: Journal of Agriculture and Food Chemistry, Vol.54 (2006), p. 7812-7816 [12] Zhao, G.
Online since: August 2014
Authors: Hao Ran Zhou, Wei Miao Yu, Hong Xia Li
But by the chemical modification, the Si-O bond is bonded to the cured products structure and thus the comprehensive performance of EP is improved.
Results and Discussion 2.1 Characterization of the structure of modified epoxy resin The FTIR spectra of A and B are shown in Fig. 1.
The introduction of polysiloxane results in increase of crosslink density and the segments distance of internal structure getting smaller than pure EP.
Jónsson, in: Theoretical Methods in Condencsed Phase Chemistry, edited by S.D.
Schwartz, volume 5 of Progress in Theoretical Chemistry and Physics, chapter, 10, Kluwer Academic Publishers (2000)
Online since: January 2014
Authors: Zhan Shou Yang, Mi Xiang Qi, Shu Ya Wang
For example, hydrothermal synthesis of nano flower structure[5] and dendritic nanostructures[6], Ultrasonic synthesis nanometer ball[7], microwave synthesis of one-dimensional nanostructures[8], microemulsion auxiliary solvent hot method[9] synthetic nanoparticles nanowires, such as structure, CTAB soft template preparation of strontium carbonate nanorods[10], by gas-liquid membrane reactor synthesizing nanometer ball[11], a new system of saturated Sr (OH) 2 exposed to air, the preparation of strontium carbonate nanowires[12], inverse microemulsion synthesis rod-shaped nano strontium carbonate[13].
Ultrasonic chemistry is mainly using ultrasonic wave to speed up and control of chemical reaction, improving the reaction yield, changing the reaction mechanism and improving reaction conditions and trigger a new chemical reaction[13].
[6] Huang Q,Gao L,Cai Y,etal.Synthesisand characterization of Strontium carbonate nanowires with a axis orientation and dendritic nanocrystals [J].Chemistry Letters,2004,33(3): 290-291
[12] Wang L,Zhu Y F.An easy method to prepare nanowire [J].Chemistry Letters,2003,32(7): 594-595
Online since: June 2014
Authors: Jie Ren, Jian Lin Zhong
Modeling and evaluation of cord/ rubber composite material The structure diagram of cord/rubber is shown in figure 4,figure 5 shows the cross section diagram of the composite material while the cord bias angle is 0°.
Fig. 4 Structure diagram of the composite material Fig. 5 Cross section of the specimen In figure 5, the length l=100mm,width b=25.4mm, thickness h=6mm,the dimension of the rubber cord d=0.75mm, the cord bias angle θ=0°.
References [1] V E.Gough, Rubber Chemistry and Technology, 1968, vol.41 , no.4, pp. 988-1021
[3] H P.Patel, Rubber Chemistry and Technology, 1976, vol.49, no. 4, pp.1095-1110
[4] J D Walter and H P.Patel, Rubber Chemistry and Technology, 1979, vol. 52, no. 4, pp. 710-724
Online since: April 2012
Authors: Nazanin Farhadyar, K. Zare, Mirabdullah Seyed Sadjadi
Zare3,d 1Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran 2Department of Chemistry, Varamin-Pishva Branch, Islamic Azad University, Tehran, Iran 3Department of Chemistry, Shahid Beheshti University, Tehran, Iran am.s.sadjad@gmail.com,bNfarhadyar@gmail.com, dkmzare@gmail.com Keywords: Core-shell ZnS/SiO2, Sol-gel, Photoluminescence, Gold covering Abstract.
In this work, we report synthesis, structure and optical properties of gold covered core-shell nanometer size of ZnS/SiO2 thin films as a patterning materials for use as a protective layer in optical phase change discs [19,20] prepared through a simple sol-gel process. .
It reveals the hexagonal structure for the as prepared ZnS nanoparticles [21] and the features correspond to the (101), (002) and (110) planes, which show obvious size broadening effects, indicating the finite size of the nanoparticles.
Online since: August 2015
Authors: Vika Ayu Devianti, Amirul Mukminin, Yulia Rachmawati, Ratna Ediati, Muhammad Ainul Fahmi, Miratul Alifah
The Effect of KOH Activation in Synthesis and Characterization of Zeolitic Imidazolate Frameworks-8 (ZIF-8) templated Mesoporous Carbon Miratul Alifah 1, a, Vika Ayu Devianti2,b ,Amirul Mukminin3,c Yulia Rachmawati4,d, Muhammad Ainul Fahmi5,e ,Ratna Ediati 6,f 1,2,3,4,5,6Department of Chemistry, Faculty of Mathematics and Natural Sciences, Indonesia amiratul.alifah@rocketmail.com, bvikaayu30@gmail.com, camirmin25@gmail.com, drahmawati30@ymail.com, eainul.fahmi@yahoo.com, fratna@chem.its.ac.id (corresponding author) Keywords: ZIF-8, template, furfuryl alcohol, nanoporous carbon, KOH activation Abstract.
FA, which is act as a carbon precursor, can fit into the pore channel of ZIF-8 template and structuring into polifurfuril alcohol (PFA).
The type I nature of the isotherms, with significant nitrogen uptake at relative pressure (P/P0) below 0.1, indicates that zif-8 templated carbon have a microporous structure.
The surface area of activated ZIF-8 templated carbon is 1101.712 m2/g and total pore volume is 5.963 cm3/g Thanks to The author would like to thank you for the funds that have been donated by Student Creativity Program for Research (PKMP) 2014 Director General of Higher Kemendikbud Republic of Indonesia, as well as facilities which have been provided by the Natural Sciences Department of Chemistry, Materials Engineering Department of ITS and ITS FTI.
Mokaya, Preparation and hydrogen storage capacity of templated and activated carbons nanocast from commercially available zeolitic imidazolate framework, Journal of Materials Chemistry 56 (2011) 120-129