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Crystallization of Tungsten Trioxide Having Small Mesopores: Highly Efficient Photoanode for Visible-Light-Driven Water Oxidation

Authors

  • Dr. Debraj Chandra,

    1. Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181 (Japan)
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  • Prof. Kenji Saito,

    1. Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181 (Japan)
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  • Prof. Tatsuto Yui,

    1. Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181 (Japan)
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  • Prof. Masayuki Yagi

    Corresponding author
    1. Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181 (Japan)
    2. Precursory Research for Embryonic Science (PRESTO), Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 (Japan)
    • Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181 (Japan)

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  • This work is financially supported by a grant-in-aid for scientific research from the JSPS. D.C. thanks JSPS for providing a postdoctoral fellowship.

Abstract

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Small mesopores are more efficient: A mesoprous oxide semiconductor (tungsten trioxide) having small mesopores was crystallized at high temperature (550 °C) by a simple one-step procedure. The highly crystalline mesoporous WO3 has an extremely high surface area which improves the visible-light-driven photoelectrochemical performance of water oxidation (see picture) relative to WO3 having interparticle mesopores.

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