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Enzyme mediated synthesis of Ag–TiO2 photocatalyst for visible light degradation of reactive dye from aqueous solution

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Abstract

The purpose of this study was to develop bio-inspired photocatalyst with solar light activity for textile dye degradation. Three TiO2 samples namely TiO2 (TiO2-A), biotemplated TiO2 (TiO2-B), and enzyme mediated Ag–TiO2 biotemplate (TiO2-C), were developed. The presence of anatase phase of TiO2 and silver in synthesized samples were confirmed using X-ray diffraction, field emission scanning electron microscopy, energy-dispersive spectroscopy, and UV–Vis–NIR spectroscopy. Photocatalytic efficiencies of these photocatalysts were evaluated by studying the oxidation of a commercial reactive dye (reactive black) under solar light irradiation in batch reactors. Photocatalytic efficiencies of the sample were compared using statistical tools like one-way ANOVA and Tukey test. The results confirmed that photocatalytic efficiency of TiO2-C was 40 % higher than that of TiO2-A under solar light irradiation.

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Acknowledgments

The authors acknowledge SASTRA University for providing financial assistance through Prof. T. R. Rajagopalan research fund. The authors also thank Department of Science and Technology, Government of India for providing access to Surface Area Analyzer through Grant No: VI-D&P/267/08/09/TDT of Drugs and Pharmaceutical Research Programme.

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Authors and Affiliations

  1. School of Chemical and Biotechnology, SASTRA University, Thirumalaisamudram, Thanjavur, 613 401, Tamil Nadu, India

    V. Gunasekar, B. Divya, K. Brinda, J. Vijaykrishnan & V. Ponnusami

  2. Centre for Nanotechnology and Advanced Biomaterials, SASTRA University, Thanjavur, 613 401, Tamil Nadu, India

    K. S. Rajan

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  1. V. Gunasekar
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  2. B. Divya
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  3. K. Brinda
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  4. J. Vijaykrishnan
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  5. V. Ponnusami
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Correspondence to V. Ponnusami.

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Gunasekar, V., Divya, B., Brinda, K. et al. Enzyme mediated synthesis of Ag–TiO2 photocatalyst for visible light degradation of reactive dye from aqueous solution. J Sol-Gel Sci Technol 68, 60–66 (2013). https://doi.org/10.1007/s10971-013-3134-2

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  • DOI: https://doi.org/10.1007/s10971-013-3134-2

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