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Online since: January 2007
Authors: Xiao Hu Chen, Xiao Min Chen, Huang Zhao, Ji Huai Wu
This technique is superior to both the conventional solid-state reaction and the
wet chemistry-based processing routes for ceramic powders for several reasons.
Al2TiO5 has an orthorhombic structure with lattice parameters a = 3.591, b = 9.429 and c = 9.636 Å (JCPDS No. 41-0258).
Kong et al [7] have proven that rod-like mullite, which has the analogous cell structure with Al2TiO5, can be synthesized via mechanical activation.
Wang: Materials Chemistry and Physics Vol. 75 (2002), p. 131 [5] S.
Pradhan: Materials Chemistry and Physics Vol. 77 (2002), p. 153 [7] L.B.
Al2TiO5 has an orthorhombic structure with lattice parameters a = 3.591, b = 9.429 and c = 9.636 Å (JCPDS No. 41-0258).
Kong et al [7] have proven that rod-like mullite, which has the analogous cell structure with Al2TiO5, can be synthesized via mechanical activation.
Wang: Materials Chemistry and Physics Vol. 75 (2002), p. 131 [5] S.
Pradhan: Materials Chemistry and Physics Vol. 77 (2002), p. 153 [7] L.B.
Online since: June 2014
Authors: Zhao Ri Ge Tu Bao, Mei Lin Jia, Meng Jie Feng, Xu Li
Introduction
Azoxybenzenes are important intermediates in industrial chemistry, which could be used in the production of dyes, indicators and liquid crystals.
Experimental Preparation of Support The ZrO2 was prepared by the sol gel method with different surfactant, such as PEG-600 and PEG-1000 as structure template.
Catalyst Characterization Specific surface area (BET) and pore structure were obtained on ASPA-2020 by American Micromeritics Company.
Both the ZrO2 supports exhibited typical mesoporous structure.
Summary Nanoparticle gold catalysts loaded on the ZrO2 with different pore structure were prepared.
Experimental Preparation of Support The ZrO2 was prepared by the sol gel method with different surfactant, such as PEG-600 and PEG-1000 as structure template.
Catalyst Characterization Specific surface area (BET) and pore structure were obtained on ASPA-2020 by American Micromeritics Company.
Both the ZrO2 supports exhibited typical mesoporous structure.
Summary Nanoparticle gold catalysts loaded on the ZrO2 with different pore structure were prepared.
Online since: October 2013
Authors: Cui Zhang, Yu Li Zhang, Xiang Ying Hao, De Yun Ma
Application of SO42-/ Al-Fe-activated Solid Acid Catalyst Prepared by cross-linking method
Yuli Zhang1,2 a, Xiangying Hao1,2,b*, Cui Zhang3,c and Deyun Ma2d
1 College of Chemistry and Environmental Science, Inner Mongolia Normal University, Huhhot, China
2College of Chemistry and Chemical Engineering, Zhaoqing University, Zhaoqing, China
3Key Laboratory of Advanced Energy Materials Chemistry(Ministryof Education), Nankai University, Tianjin, China
azhangyuli0227@qq.com, bxyinghao@zqu.edu.cn, czhangcui@nankai.edu.cn, d51078144@qq.com
Keywords: cross-linking method; solid acid; turpentine; hydration
Abstract.
Introduction HangJin 2# clay from Inner Mongolia is a kind of aluminosilicate and performs dioctahedral layer structure[[1] Bing Chen.
The Preparation of Chromium Aluminum Pillared Montmorillonite and The Channel Structure, J.
These changes mean that Al and Fe composite crosslinking agent has insert into the HangJin 2# clay and formed column braced structure of the metal oxide after calcinating.
But it did not enter the layers of the lattice in HangJin 2# clay, and not caused any changes in the structure of HangJin 2# clay [ ].
Introduction HangJin 2# clay from Inner Mongolia is a kind of aluminosilicate and performs dioctahedral layer structure[[1] Bing Chen.
The Preparation of Chromium Aluminum Pillared Montmorillonite and The Channel Structure, J.
These changes mean that Al and Fe composite crosslinking agent has insert into the HangJin 2# clay and formed column braced structure of the metal oxide after calcinating.
But it did not enter the layers of the lattice in HangJin 2# clay, and not caused any changes in the structure of HangJin 2# clay [ ].
Online since: July 2011
Authors: Zhen Chen, Hong Fang Xie, Xi Zheng, Xiu Ling Ma, Shao Bin Li, Yu Xi Ren
Imprinted β-cyclodextrin polymer for recognition of naringin
Xi Zheng1,a, Xiu-ling Ma1,b, Hong-fang Xie2,c,Shao-bin Li2,d,
Yu-xi Ren1,e and Zhen Chen1,2,f
1College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
2Department of Chemistry, Ningde Normal University, Ningde 352100, China
ae-mail:zhengxi@fjnu.edu.cn; be-mail:mxl502@163.com; ce-mail: xiehongfang66@163.com;
de-mail: bin806@sina.com; ee-mail: 43964690@qq.com; f e-mail: zc1224@pub1.fz.fj.cn
Key words: molecularly imprinted polymer; naringin; β-cyclodextrin
Abstract: The objective of this study was to find out a kind of MIP which was suitable for recognizing NG in aqueous medium.
Table 1 Pore structures and swelling of the MIP Polymer αs,BET [m2/g] Dp [nm] β-CD[11] 1.5753 0.60~0.65 MIP 11.156 20.305 In order to obtain a porous structure, a phase separation must be occurred during the course of the cross-linking process.
A higher pore diameter in the structure of MIP may enforce the binding to this polymer and increase selectivity.
A loose structure was also favorable to the capacity of the molecular imprinting.
Zhang: Supramolecular Chemistry Molecular Recognition and Assembly of Synthetic Receptors (Nankai University Press, Tianjin 2001)
Table 1 Pore structures and swelling of the MIP Polymer αs,BET [m2/g] Dp [nm] β-CD[11] 1.5753 0.60~0.65 MIP 11.156 20.305 In order to obtain a porous structure, a phase separation must be occurred during the course of the cross-linking process.
A higher pore diameter in the structure of MIP may enforce the binding to this polymer and increase selectivity.
A loose structure was also favorable to the capacity of the molecular imprinting.
Zhang: Supramolecular Chemistry Molecular Recognition and Assembly of Synthetic Receptors (Nankai University Press, Tianjin 2001)
Online since: March 2006
Authors: Yi Long Cao, Xue Bin Deng, Hui Ma, Shui Feng Wang, Xin Hua Zhao
The synthesis and characterization of ZrW2O7(OH1-X,ClX)2·2H2O
(X=0.016, 0.025)
Yilong Cao1a, Xuebin Deng1a
, Hui Ma
2a, Shuifeng Wang2a
, Xinhua Zhao
1a*
1
Department of Chemistry, Beijing Normal University Beijing 100875, P.
China a Xinhuaz@bnu.edu.cn Keywords: ZrW2O7(OH1-x,Clx)2·2H2O; acid steam hydrothermal (ASH); chlorine measurement; structure refinement Abstract.
To reveal the crystal structure in detail and to control the quality of the basic zirconium tungstate preparation, in this work a study was preformed on the composition of Cl- and crystal structure of the chlorine substitution of basic zirconium tungstate ZrW2O7(OH1-x,Clx)2·2H2O (x = 0.016, 0.025).
O(5) is bridge linkages of the neighbor one dimension structure to build the three-dimensional net framework [12].
Vol. 10 (1959), p. 69 Journal of Inorganic and Nuclear Chemistry [2] P.
China a Xinhuaz@bnu.edu.cn Keywords: ZrW2O7(OH1-x,Clx)2·2H2O; acid steam hydrothermal (ASH); chlorine measurement; structure refinement Abstract.
To reveal the crystal structure in detail and to control the quality of the basic zirconium tungstate preparation, in this work a study was preformed on the composition of Cl- and crystal structure of the chlorine substitution of basic zirconium tungstate ZrW2O7(OH1-x,Clx)2·2H2O (x = 0.016, 0.025).
O(5) is bridge linkages of the neighbor one dimension structure to build the three-dimensional net framework [12].
Vol. 10 (1959), p. 69 Journal of Inorganic and Nuclear Chemistry [2] P.
Online since: March 2014
Authors: Sergey S. Voznesenskiy, Aleksandr Nepomnyaschiy, Y.N. Kulchin
Besides, lately there is a tendency to the development of «green chemistry» methods - use of renewable natural resources and limiting the use of toxic reagents and organic solvents.
In the upper part of the image it is visible not exposed dense structure of chitosan, and in the lower part of the image it is well visible exposed area and more friable structure of the material.
To determine the sensitivity we used the structure of «dose wedge» [7], which is a set of identical rectangles, following one another, and dose evenly decreasing from the right edge of the structure to the left.
Example of the structure, obtained on the chitosan film: a) AFM - image; b) profile of the obtained structure.
Single-crystal colloidal multilayers of controlled thickness, Chemistry of Materials, Vol 11 (1999) 2132-2140
In the upper part of the image it is visible not exposed dense structure of chitosan, and in the lower part of the image it is well visible exposed area and more friable structure of the material.
To determine the sensitivity we used the structure of «dose wedge» [7], which is a set of identical rectangles, following one another, and dose evenly decreasing from the right edge of the structure to the left.
Example of the structure, obtained on the chitosan film: a) AFM - image; b) profile of the obtained structure.
Single-crystal colloidal multilayers of controlled thickness, Chemistry of Materials, Vol 11 (1999) 2132-2140
Online since: April 2015
Authors: Yuan Bin She, Ting Wen Jia, Hai Yan Fu, Huan Chang
This paper presented a simple and effective method for the synthesis of unsymmetrical meso-phenyl-substituted porphyrins, which could be applied to link blocks for dye-sensitized solar cells of different structures.
In order to overcome the main disadvantages associated with the need of highly toxic oxidant and unavoidable side reactions in the reported synthetic methods of unsymmetrical meso-phenyl-substituted porphyrins, an improved Macdonald-type 2+2 condensation based on the mixed solvents of dipyrromethanes and aldehydes were adopted to synthesize a series of 5-(R-group)-10, 15 and20-tris (4-methylphenyl) porphyrins, and all the structures were characterized by melting point analysis, electronic absorption spectroscopy and 1H NMR spectroscopy.
And the structure of porphyrins were also identified by UV-visible and 1H NMR.
The Journal of Physical Chemistry C, 2012. 117(2): p. 763-773
The Journal of Physical Chemistry C, 2009. 113(42): p. 18406-18413
In order to overcome the main disadvantages associated with the need of highly toxic oxidant and unavoidable side reactions in the reported synthetic methods of unsymmetrical meso-phenyl-substituted porphyrins, an improved Macdonald-type 2+2 condensation based on the mixed solvents of dipyrromethanes and aldehydes were adopted to synthesize a series of 5-(R-group)-10, 15 and20-tris (4-methylphenyl) porphyrins, and all the structures were characterized by melting point analysis, electronic absorption spectroscopy and 1H NMR spectroscopy.
And the structure of porphyrins were also identified by UV-visible and 1H NMR.
The Journal of Physical Chemistry C, 2012. 117(2): p. 763-773
The Journal of Physical Chemistry C, 2009. 113(42): p. 18406-18413
Online since: October 2011
Authors: Ishikawa Kunio, Shigeki Matsuya, Melvin L. Munar, Taro Nikaido, Fumikazu Daitou, Seiji Nakamura, Kanji Tsuru
Besides, bone substitutes with fully-interconnected pore structure are attractive as it allows tissue ingrowth.
Therefore bTCP with fully-interconnected porous structure may be one of the ideal artificial bone substitutes.
In this study, bTCP with fully-interconnected porous structure was fabricated by employing MgO as bTCP stabilizer.
Fully-interconnected porous structure and high porosity seems to be ideal for the bone substitute.
Elliot, Structure and chemistry of the apatites and other calcium orthophosphates, Elsevier, Amsterdam, 1994
Therefore bTCP with fully-interconnected porous structure may be one of the ideal artificial bone substitutes.
In this study, bTCP with fully-interconnected porous structure was fabricated by employing MgO as bTCP stabilizer.
Fully-interconnected porous structure and high porosity seems to be ideal for the bone substitute.
Elliot, Structure and chemistry of the apatites and other calcium orthophosphates, Elsevier, Amsterdam, 1994
Online since: January 2020
Authors: Rida Gallyamova, N.Yu. Dudareva
The Effect of Silicon in Al-Si Alloys and Electrical Treatment Modes on Structure and Properties of MAO-Coatings
N.Yu.
Shcherbakov, Structure and properties of coatings during microarc oxidation, J.
Physics and Chemistry of Materials Processing 5 (1991) 121-126
Velikoselskaya, Formation of hardened surface layers by the method of microarc oxidation in various electrolytes and when current regimes change, Physics and Chemistry of Materials Processing 1 (1991) 87-93
Structure, Properties and Processing, Springer, 2008
Shcherbakov, Structure and properties of coatings during microarc oxidation, J.
Physics and Chemistry of Materials Processing 5 (1991) 121-126
Velikoselskaya, Formation of hardened surface layers by the method of microarc oxidation in various electrolytes and when current regimes change, Physics and Chemistry of Materials Processing 1 (1991) 87-93
Structure, Properties and Processing, Springer, 2008