Incorporation of CdS nanoparticles formed in reverse micelles into mesoporous silica

被引：46

作者：

Hirai, T ^{[1
]}

Okubo, H

Komasawa, I

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Dept Sci & Chem Engn, Toyonaka, Osaka 5608531, Japan

[2] Osaka Univ, Res Ctr Photoenerget Organ Mat, Toyonaka, Osaka 5608531, Japan

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2001年 / 235卷 / 02期

基金：

日本学术振兴会;

关键词：

mesoporous silica; CdS nanoparticles; size-selective incorporation; photocatalyst;

D O I：

10.1006/jcis.2000.7377

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：

The incorporation of CdS nanoparticles, prepared in reverse micellar systems, into thiol-modified mesoporous silica, such as FM41 (functionalized MCM-41) and FM48 (functionalized MCM-48), has been investigated. The nanoparticles were immobilized in the mesopores via the incorporation of water droplets of the reverse micelles. A particle-sieving effect for FM41 having large (L-FM41, 3.8 nm) and medium (M-FM41, 3.6 nm) pore size was observed, in that the incorporation of the CdS nanoparticles was decreased with increasing particle size and with decreasing pore size of the FM41. Chemical vapor deposition treatment employed to narrow the mesopores of the CdS-FM41 enhanced the stability of CdS nanoparticles against heat treatment. The CdS-FM41 composites demonstrated photocatalytic activity for H-2 generation from 2-propanol aqueous solution, the better photocatalytic activity being obtained with the larger pore size for CdS-L-FM41. (C) 2001 Academic Press.

引用

页码：358 / 364

页数：7

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