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Photocatalytic degradation of azo dyes catalyzed by Ag doped TiO2 photocatalyst

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Abstract

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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Authors and Affiliations

  1. Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan, 81746-73441, Iran

    V. Mirkhani, S. Tangestaninejad, M. Moghadam, M. H. Habibi & A. Rostami-Vartooni

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  1. V. Mirkhani
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  2. S. Tangestaninejad
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  3. M. Moghadam
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  4. M. H. Habibi
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  5. A. Rostami-Vartooni
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Correspondence to V. Mirkhani.

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Mirkhani, V., Tangestaninejad, S., Moghadam, M. et al. Photocatalytic degradation of azo dyes catalyzed by Ag doped TiO2 photocatalyst. JICS 6, 578–587 (2009). https://doi.org/10.1007/BF03246537

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  • DOI: https://doi.org/10.1007/BF03246537

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