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.
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收藏
页码：578 / 587
页数：10
相关论文
共 31 条
  • [1] ALQARADAWI S, 2002, J PHOTOCH PHOTOBIO A, V148, P161, DOI DOI 10.1016/S1010-6030(02)00086-2
  • [2] Adsorption of organic dyes on the aminosilane modified TiO2 surface
    Andrzejewska, A
    Krysztafkiewicz, A
    Jesionowski, T
    [J]. DYES AND PIGMENTS, 2004, 62 (02) : 121 - 130
  • [3] Heterogeneous photocatalytic oxidation of polyvinyl alcohol in water
    Chen, YX
    Sun, ZS
    Yang, Y
    Ke, Q
    [J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2001, 142 (01) : 85 - 89
  • [4] Photocatalytic degradation and mineralization of bisphenol A by TiO2 and platinized TiO2
    Chiang, K
    Lim, TM
    Tsen, L
    Lee, CC
    [J]. APPLIED CATALYSIS A-GENERAL, 2004, 261 (02) : 225 - 237
  • [5] Photocatalytic degradation of azo dye acid red 14 in water on ZnO as an alternative catalyst to TiO2
    Daneshvar, N
    Salari, D
    Khataee, AR
    [J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2004, 162 (2-3) : 317 - 322
  • [6] Photocatalytic degradation of azo dye acid red 14 in water: investigation of the effect of operational parameters
    Daneshvar, N
    Salari, D
    Khataee, AR
    [J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2003, 157 (01) : 111 - 116
  • [7] Heterogeneous photocatalytic degradation of nitrophenols
    Di Paola, A
    Augugliaro, V
    Palmisano, L
    Pantaleo, G
    Savinov, E
    [J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2003, 155 (1-3) : 207 - 214
  • [8] Fujii N, 2000, MOL VIS, V6, P1
  • [9] Habibi MH, 2004, POL J CHEM, V78, P851
  • [10] Photocatalytic mineralisation of mercaptans as environmental pollutants in aquatic system using TiO2 suspension
    Habibi, MH
    Tangestaninejad, S
    Yadollahi, B
    [J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 2001, 33 (01) : 57 - 63
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