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Visible-Light Photocatalytic Properties of W18O49/TiO2 and WO3/TiO2 Heterocomposites

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Abstract

Dark blue W18O49 nanorod (NR) with ~50 nm length and ~4 nm width was synthesized by thermally induced crystal growth process. Pale yellow WO3 NR with the same dimension was also prepared by post-annealing the as-prepared W18O49 NR at 400 °C in air. The W18O49/TiO2 and WO3/TiO2 nanocomposites were then formed by coupling the corresponding NRs and TiO2 by sol–gel process. Under visible-light irradiation (λ ≥ 422 nm), the W18O49/TiO2 showed a remarkably high photocatalytic activity in removing gaseous 2-propanol (IP) and in evolving CO2. Its efficiency (6.9 ppm CO2 in 2 h) was more than twice that of the WO3/TiO2, which seems to be caused by a profound visible-light absorbance of W18O49 NR.

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Acknowledgments

This work has been supported by the Ministry of Education, Science, and Technology (NRF-2011-0028981), and Inha University.

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Authors and Affiliations

  1. Department of Chemistry, Inha University, Incheon, 402-751, Republic of Korea

    Sher Bahadur Rawal, Sandipan Bera & Wan In Lee

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  1. Sher Bahadur Rawal
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  2. Sandipan Bera
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  3. Wan In Lee
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Correspondence to Wan In Lee.

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Rawal, S.B., Bera, S. & Lee, W.I. Visible-Light Photocatalytic Properties of W18O49/TiO2 and WO3/TiO2 Heterocomposites. Catal Lett 142, 1482–1488 (2012). https://doi.org/10.1007/s10562-012-0924-z

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  • DOI: https://doi.org/10.1007/s10562-012-0924-z

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