The photocatalytic degradation of Reactive Black 5 (RB 5), a di-azo dye was investigated over M/TiO2 (M = Ag, Au and Pt) photocatalysts irradiated with UV and visible light. TiO2 was prepared by sol–gel technique (Syn-TiO2). Photodeposition of metal salt precursors over Syn-TiO2 was carried out so as to obtain 1 wt% of M/TiO2 catalysts. The photodecolourization and photodegradation reactions were also compared with commercial TiO2 (Degussa P25) catalyst. Kinetic studies for the decolourization of RB 5 showed that it followed pseudo first order. Recycling of catalysts was performed to check the economic feasibility of the photocatalytic process. In order to check the applicability of M/TiO2 catalyst in the treatment of industrial effluent, real textile effluent was collected from an industry and subjected to photodegradation and the results are presented. Enhanced activity of M/TiO2 catalyst under visible light irradiation highlights its importance in the field of photocatalysis.
Noble metal modified titania catalysts in the degradation of Reactive Black 5: a kinetic approach
A. Valentine Rupa, R. Vaithiyanathan, T. Sivakumar; Noble metal modified titania catalysts in the degradation of Reactive Black 5: a kinetic approach. Water Sci Technol 1 September 2011; 64 (5): 1040–1045. doi: https://doi.org/10.2166/wst.2011.524
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