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Effect of scandium on the structural and photocatalytic properties of titanium dioxide thin films

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Abstract

Pure and scandium doped-TiO2 thin films were prepared by the sol-gel process and coated by dip coating. The effects of scandium on the phase formation, optical properties and photoactivity of the TiO2 thin films were investigated. The lattice parameters and the crystallinity of the anatase phase, characterized by the Rietveld method, demonstrated that scandium doping affected the structural parameters and crystallinity of the films, modifying the absorption edge. A direct correlation was found between band gap energy and photodegradation efficiency, with lower values of band gap energy augmenting this efficiency. Moreover, a significant improvement in the catalyst’s photodegradation efficiency was attained with a scandium concentration of 5.0 mol%.

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Acknowledgements

The authors thank the Brazilian research-funding agency CAPES for the financial support.

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Authors and Affiliations

  1. Depto de Química, Instituto de Biociências, UNESP, Distrito de Rubião Junior, s/n, P.O. Box 510, 18618-000, Botucatu, SP, Brazil

    A. A. Cavalheiro, J. C. Bruno, M. J. Saeki, J. P. S. Valente & A. O. Florentino

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  1. A. A. Cavalheiro
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  2. J. C. Bruno
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  3. M. J. Saeki
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  4. J. P. S. Valente
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  5. A. O. Florentino
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Correspondence to A. A. Cavalheiro.

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Cavalheiro, A.A., Bruno, J.C., Saeki, M.J. et al. Effect of scandium on the structural and photocatalytic properties of titanium dioxide thin films. J Mater Sci 43, 602–608 (2008). https://doi.org/10.1007/s10853-007-1743-2

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  • DOI: https://doi.org/10.1007/s10853-007-1743-2

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