THE SENSITIZED PHOTOCATALYSIS OF AZO DYES IN A SOLID SYSTEM - A FEASIBILITY STUDY

被引：23

作者：

DIECKMANN, MS ^{[1
]}

GRAY, KA ^{[1
]}

ZEPP, RG ^{[1
]}

机构：

[1] US EPA,ENVIRONM RES LAB,ATHENS,GA 30613

来源：

CHEMOSPHERE | 1994年 / 28卷 / 05期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0045-6535(94)90018-3

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The degradation of 4-hydroxyazobenzene and Solvent Red 1 on various oxide particles (SiO2, Al2O3 and TiO2) was monitored using diffuse reflectance spectroscopy. Adsorption of the dye onto the support material can facilitate photolytic degradation by affecting its bonding. Analysis of the absorption spectra throughout the degradation process indicates that the C-N bond in these azo dyes is the site for oxidative attack. The dependence of degradation rate on surface coverage indicates that direct interaction between the dye molecule and the TiO2 particles is necessary for sensitized photocatalysis to be an effective method of degradation.

引用

页码：1021 / 1034

页数：14

共 10 条

[1]

ADAMS RL, 1993, UNPUB ENV TOXICOL CH

[2] PHOTOCATALYZED DEGRADATION OF ADSORBED NITROPHENOLIC COMPOUNDS ON SEMICONDUCTOR SURFACES [J].