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A study of mechanism and operational parameters on solar light-induced degradation of Reactive Red 120 dye with AgBr-loaded TiO2

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Abstract

The photocatalytic activity of AgBr–TiO2 was investigated for the degradation of Reactive Red 120 (RR 120) in aqueous solution using solar light. AgBr–TiO2 was found to be more efficient than commercial TiO2–P25 and prepared TiO2 at pH 5 for the degradation of Reactive Red 120. The effects of operational parameters such as the amount of photocatalyst and initial pH on photo degradation have been analyzed. Based on the degradation intermediates identified by GC–MS analysis, a reaction pathway is proposed. The mechanism of solar degradation is reported and discussed using band energy levels of AgBr and TiO2.

Graphical abstract

Higher photocatalytic activity of AgBr nanoparticle loaded TiO2 (AgBr–TiO2) is found to have increased electron–hole separation by AgBr loading.

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  1. R. Velmurugan

    Present address: Department of Chemistry, SKP Engineering college, Tiruvannamalai, 606 611, Tamilnadu, India

Authors and Affiliations

  1. Photocatalysis Laboratory, Department of Chemistry, Annamalai University, Annamalainagar, 608 002, Tamilnadu, India

    R. Velmurugan & M. Swaminathan

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  1. R. Velmurugan
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  2. M. Swaminathan
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Correspondence to M. Swaminathan.

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Velmurugan, R., Swaminathan, M. A study of mechanism and operational parameters on solar light-induced degradation of Reactive Red 120 dye with AgBr-loaded TiO2 . Res Chem Intermed 41, 1227–1241 (2015). https://doi.org/10.1007/s11164-013-1268-z

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  • DOI: https://doi.org/10.1007/s11164-013-1268-z

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