Kinetics of Photocatalytic Degradation of Diuron in Aqueous Colloidal Solutions of Q-TiO2 Particles

0181718 - UFCH-W 20030152 RIV CH eng J - Journal Article
Macounová, Kateřina - Krýsová, Hana - Ludvík, Jiří - Jirkovský, Jaromír
Kinetics of Photocatalytic Degradation of Diuron in Aqueous Colloidal Solutions of Q-TiO2 Particles.
Journal of Photochemistry and Photobiology A-Chemistry. Roč. 156, - (2003), s. 273-282. ISSN 1010-6030. E-ISSN 1873-2666
R&D Projects: GA ČR GA203/99/0763; GA ČR GA203/00/D071; GA ČR GA203/02/0983; GA AV ČR IAA4040804
Institutional research plan: CEZ:AV0Z4040901
Keywords : photocatalytic degradation * phenylurea herbicide diuron * Q-TiO2
Subject RIV: CG - Electrochemistry
Impact factor: 1.693, year: 2003

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.
Permanent Link: http://hdl.handle.net/11104/0001927