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Photocatalytic Removal of Phenol Under UV Irradiation on WO x –TiO2 Prepared by Sol–Gel Method

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Abstract

New WO x –TiO2 photocatalysts were prepared via sol–gel method from tetraisopropyl orthotitanate and WO2. For comparison TiO2 was also prepared by the same method. These photocatalysts were tested for phenol degradation in an aqueous solution under UV irradiation. Experimentally measured OH radicals formation on WO x –TiO2 photocatalysts was quantitatively much higher than on TiO2, what increased their photocatalytic activity towards phenol decomposition. Band gap of the prepared photocatalysts was calculated from the obtained derivatives of UV–Vis/DR spectra and it was observed that E g decreased with increasing calcination temperature in both, TiO2 and WO x –TiO2. This was caused by the improving crystallinity of anatase phase and formation of rutile, which had a lower value of E g than anatase. In general the presence of WO x in TiO2 suppressed transformation of anatase to rutile.

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Acknowledgments

This work was supported by the research project from the Ministry of Science and Higher Education Nr COST/299/2006 for 2007–2010.

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Authors and Affiliations

  1. Institute of Chemical and Environment Engineering, Szczecin University of Technology, ul.Pułaskiego 10, 70-322, Szczecin, Poland

    M. Piszcz, B. Tryba, B. Grzmil & A. W. Morawski

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  1. M. Piszcz
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  2. B. Tryba
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  3. B. Grzmil
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  4. A. W. Morawski
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Corresponding author

Correspondence to M. Piszcz.

Additional information

The work was presented during the conference ‘Catalysis for Society', Krakow, May 11–15, 2008.

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Piszcz, M., Tryba, B., Grzmil, B. et al. Photocatalytic Removal of Phenol Under UV Irradiation on WO x –TiO2 Prepared by Sol–Gel Method. Catal Lett 128, 190–196 (2009). https://doi.org/10.1007/s10562-008-9730-z

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  • DOI: https://doi.org/10.1007/s10562-008-9730-z

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