Two competitive primary processes in the photodegradation of cationic triarylmethane dyes under visible irradiation in TiO2 dispersions

被引：79

作者：

Li, XZ ^{[1
]}

Liu, GM ^{[1
]}

Zhao, JC ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Photog Chem, Beijing 100101, Peoples R China

来源：

NEW JOURNAL OF CHEMISTRY | 1999年 / 23卷 / 12期

关键词：

D O I：

10.1039/a906765e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The photocatalytic degradation of two cationic triarylmethane dyes, crystal violet (CV) and fuchsin basic (FB), was examined in aqueous TiO2 suspensions under visible light irradiation. The techniques of (HNMR)-H-1, UV-Vis and EPR have been used to identify the photodecomposed products and intermediates and to demonstrate the photocatalytic mechanism of the dye on the semiconductor surface. The degradation undergoes a competitive primary process between demethylation and decomposition of the whole conjugated structure.

引用

页码：1193 / 1196

页数：4

共 15 条

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