Characterization of porous silica prepared from mechanically amorphized kaolinite by selective leaching

被引:43
作者
Temuujin, J
Okada, K
MacKenzie, KJD
Jadambaa, T
机构
[1] Tokyo Inst Technol, Dept Met & Ceram Sci, Meguro Ku, Tokyo 1528552, Japan
[2] Mongolian Acad Sci, Inst Chem & Chem Technol, Ulaanbaatar, Mongolia
[3] Univ Oxford, Dept Mat, Oxford OX1 3PH, England
[4] Mongolian Tech Univ, Dept Chem Technol, Ulaanbaatar, Mongolia
基金
日本学术振兴会;
关键词
porous silica; mechanical treatment; kaolinite;
D O I
10.1016/S0032-5910(01)00363-1
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The structure of leached products from mechanically amorphized kaolinite was investigated by various techniques. The Si-29 MAS NMR spectrum of the leached products showed peaks at - 102 and - 111 ppm, assigned to the silanol groups and the three-dimensional silica framework, respectively. The micropore size distribution calculated by the Horvath-Kawazoe method, using Ar gas as the adsorbate, showed a maximum at 0.9 nm, suggesting slit-shaped pores formed between the layers of the mechanically destroyed kaolinite. Longer leaching times reduce the number of micropores due to a condensation reaction. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:259 / 262
页数:4
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