Synthesis and growth mechanism of GeO2 particles in AOT reversed micelles

被引：30

作者：

Kawai, T ^{[1
]}

Usui, Y ^{[1
]}

Kon-No, K ^{[1
]}

机构：

[1] Tokyo Univ Sci, Fac Engn, Dept Ind Chem, Tokyo 162, Japan

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1999年 / 149卷 / 1-3期

关键词：

GeO2; particle; growth mechanism; reversed micelles; sodium bis(2-ethylhexyl) sulfosuccinate; water/oil microemulsion;

D O I：

10.1016/S0927-7757(98)00327-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

GeO2 particles with a narrow size distribution were synthesized using hydrolyzing germanium tetraethoxide (GTE) in a 2,2,4-trimethylpentane solution of sodium bis(2-ethylhexyl) sulfosuccinate (AOT) as a function of water content (R-w=[H2O]/[AOT]). Their shape was observed to be polyhedral in the absence of excess water, whereas it was cubic in the presence of bulk-like water. The size and shape varied with R-w such that the solubilized state of water in effect determined the growth process. In addition, by examining the time-dependent growth of GeO2, particles in a W/O microemulsion (R-w=20), we clarified that water condensation of hydrolyzed GTE is the rate-limiting step in particle growth. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：39 / 47

页数：9

共 32 条

[1] STUDIES OF THE KINETICS OF THE PRECIPITATION OF UNIFORM SILICA PARTICLES THROUGH THE HYDROLYSIS AND CONDENSATION OF SILICON ALKOXIDES [J].