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

来源：

POWDER TECHNOLOGY | 2001年 / 121卷 / 2-3期

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

页码：259 / 262

页数：4

共 5 条

[1] Micropore formation by acid treatment of antigorite [J].