THE PHOTOOXIDATION OF ACETIC-ACID BY OXYGEN IN THE PRESENCE OF TITANIUM-DIOXIDE AND DISSOLVED COPPER IONS

被引：65

作者：

BIDEAU, M

CLAUDEL, B

FAURE, L

KAZOUAN, H

机构：

[1] Laboratoire de Cinétique et Génie Chimiques, 404 INSA, F-69621 Villeurbanne

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1991年 / 61卷 / 02期

关键词：

D O I：

10.1016/1010-6030(91)85095-X

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：

Acetic acid is oxidized by oxygen in the presence of UV light, TiO2 and dissolved copper ions being the catalysts. The reaction rate is zeroth order with respect both to acetic acid and to dissolved oxygen, and is proportional to the absorbed light intensity, with a quantum yield of 0.06. The variation in reaction rate with the concentrations of the different copper species present in the solution, i.e. free ions, Cu(CH3COO)+ and Cu(CH3COO)2, leads us to propose the second of these as the reactive species adsorbed on the TiO2 surface, the diacetato complex (or neutral salt) also being adsorbed on the TiO2 surface, but as a poison. These results extend those already obtained for formic acid and are a part of a general scheme of photo-oxidation of carboxylic acids in the presence of these catalysts.

引用

页码：269 / 280

页数：12