Photocatalytic Degradation of Azo Dyes Catalyzed by Ag Doped TiO2 Photocatalyst

被引：83

作者：

Mirkhani, V. ^{[1
]}

Tangestaninejad, S. ^{[1
]}

Moghadam, M. ^{[1
]}

Habibi, M. H. ^{[1
]}

Rostami-Vartooni, A. ^{[1
]}

机构：

[1] Univ Isfahan, Catalysis Div, Dept Chem, Esfahan 8174673441, Iran

来源：

JOURNAL OF THE IRANIAN CHEMICAL SOCIETY | 2009年 / 6卷 / 03期

关键词：

Azo dyes; Titanium dioxide; Photodegradation; Photocatalyst; Ag-TiO2; PHOTODEGRADATION; WATER; MINERALIZATION; OXIDATION; ZNO;

D O I：

10.1007/BF03246537

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, photocatalytic degradation of commercial textile azo dyes catalyzed by titanium dioxide and modified titanium dioxide with Ag metal (1% w/w) in aqueous solution under irradiation with a 400 W high-pressure mercury lamp is reported. The effect of various parameters such as irradiation time of UV light, amount of photocatalyst, flow rate of oxygen, pH and temperature for the Ag-TiO2 photocatalyst were investigated. Kinetic investigations of photodegradation indicated that reactions obey improved Langmuir-Hinshelwood model and pseudo-first-order law. The rate constant studies of photocatalytic degradation reactions for Ag-TiO2 and TiO2 photocatalysts indicated that in all cases the rate constant of the reaction for Ag-TiO2 was higher than that of TiO2.

引用

页码：578 / 587

页数：10

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