Influence of metallic species on TiO2 for the photocatalytic degradation of dyes and dye intermediates

被引：95

作者：

Rao, KVS ^{[1
]}

Lavédrine, B ^{[1
]}

Boule, P ^{[1
]}

机构：

[1] Univ Clermont Ferrand, Photochim Mol & Macromol Lab, CNRS, UMR 6505, F-63177 Clermont Ferrand, Aubiere, France

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2003年 / 154卷 / 2-3期

关键词：

photocatalysis; silver; copper; vanadate; acid orange-7; tartrazine; 3-NBSA;

D O I：

10.1016/S1010-6030(02)00299-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：

The present work is focused on the influence of metal salts on the photocatalytic efficiency of TiO2 for the elimination of two azo dyes: acid orange-7 (AO-7), tartrazine and a dye intermediate: 3-nitrobenzenesulfonic acid (3-NBSA). A beneficial effect of the presence of metallic species was observed only with samples containing silver. In contrast when compared with Ag+, Cu2+ and specifically VO3- showed an inhibiting effect on the kinetics of degradation for the three substrates studied. No significant decrease in the initial concentration of the substrates was observed for direct phototransformation in sunlight during the same time. (C) 2003 Elsevier Science B.V. All rights reserved.

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页码：189 / 193

页数：5

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