Kinetics of photocatalytic degradation of diuron in aqueous colloidal solutions of Q-TiO2 particles

被引：74

作者：

Macounová, K ^{[1
]}

Krysová, H ^{[1
]}

Ludvík, J ^{[1
]}

Jirkovsky, J ^{[1
]}

机构：

[1] Acad Sci Czech Republ, J Heyrovsky Inst Phys Chem, CR-18223 Prague 8, Czech Republic

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2003年 / 156卷 / 1-3期

关键词：

photocatalytic degradation; phenylurea herbicide diuron; Q-TiO2; particles;

D O I：

10.1016/S1010-6030(02)00091-6

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：

Kinetics of the photocatalytic degradation of a phenylurea herbicide diuron in aqueous colloidal solutions of Q-TiO2 nanoparticles was analyzed in detail applying a model of parallel consecutive reactions of the first-order. The found mechanism was compared with the reaction pathways of electrochemically assisted photoprocesses on illuminated TiO2 layers, polarized by external voltage, in various solvents. While a reductive dechlorination on benzene ring of diuron represented the major pathway in acetonitrile, a consecutive oxidative demethylation on the aliphatic side chain was mainly observed in water. (C) 2003 Published by Elsevier Science B.V.

引用

页码：273 / 282

页数：10

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