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Photocatalytic activity of TiO2 films prepared by sol–gel and electrodeposition on the decolourization of monoazo dyes

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Abstract

TiO2 films were prepared effectively using titanium tetraisopropoxide sol by simple electrodeposition technique on conductive indium tin oxide plates followed by annealing. The films thus obtained were characterized by XRD, FT-IR, SEM, UV-DRS, AFM and PL analyses. X-ray patterns of non-annealed film show the amorphous nature, while the annealed film indicates the formation of anatase. This distinction is also observed from AFM images. The band gap energy obtained from UV-DRS spectra of the annealed film was 1.8 eV. This narrowed band gap can be attributed to the presence of hydroxyl groups and the existence of Ti–OH bonds as evidenced from FT-IR spectra. The photocatalytic activity of the films was tested with model pollutants such as Reactive Red 2 and Disperse Yellow 231 dyes. The photocatalytic degradation performance of the film depends on the concentration of dye, pH of the solution and treatment time. Study on the electrode after repeated usages show that the electrode can be reused up to 20 times with percentage of deficiency <15 %.

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Acknowledgments

The authors wish to thank DST—PURSE, UGC Project (34-372/2008) for the provision of research facilities. The provision of XRD facility by the Department of Physics, Alagappa University is greatly acknowledged.

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Authors and Affiliations

  1. Department of Industrial Chemistry, School of Chemical Sciences, Alagappa University, Karaikudi, 630 003, Tamilnadu, India

    S. Clara Anthoniamma & H. Gurumallesh Prabu

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  1. S. Clara Anthoniamma
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  2. H. Gurumallesh Prabu
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Correspondence to H. Gurumallesh Prabu.

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Clara Anthoniamma, S., Gurumallesh Prabu, H. Photocatalytic activity of TiO2 films prepared by sol–gel and electrodeposition on the decolourization of monoazo dyes. J Sol-Gel Sci Technol 73, 118–126 (2015). https://doi.org/10.1007/s10971-014-3502-6

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  • DOI: https://doi.org/10.1007/s10971-014-3502-6

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