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
收藏
页码：578 / 587
页数：10
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