Photocatalytic degradation of aqueous pollutants using silica-modified TiO2

被引：112

作者：

Vohra, MS ^{[1
]}

Tanaka, K ^{[1
]}

机构：

[1] Oita Univ, Fac Engn, Dept Appl Chem, Oita 8701192, Japan

来源：

WATER RESEARCH | 2003年 / 37卷 / 16期

关键词：

TiO2; SiO2-coating; photocatalysis; paraquat; cationic surfactant;

D O I：

10.1016/S0043-1354(03)00333-6

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Photocatalytic degradation (PCD) of several aqueous pollutants was investigated using a porous silica-coated titanium dioxide (SiO2-TiO2) photocatalyst. Several cationic, neutral and anionic pollutants were tested. The results indicate that modifying the surface properties of TiO2 using silica significantly enhances the PCD rate of the cationic pollutants. The rate enhancement decreased with an increase in substrate concentration, especially for the quaternary amines, and was attributed to the decrease in initial adsorption. However, no significant rate-increase resulted for acetate and phenol. Results suggest that the increased presence of cationic pollutants at the catalyst surface caused the rate enhancement. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：3992 / 3996

页数：5

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