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The Effect of Alkaline Earth Metal Ion Dopants on Photocatalytic Water Splitting by NaTaO3 Powder

Authors

  • Akihide Iwase Dr.,

    1. Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjyuku-ku, Tokyo 162-8601 (Japan), Fax: (+81) 3-5261-4631
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  • Hideki Kato Dr.,

    1. Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjyuku-ku, Tokyo 162-8601 (Japan), Fax: (+81) 3-5261-4631
    2. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577 (Japan)
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  • Akihiko Kudo Prof.

    1. Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjyuku-ku, Tokyo 162-8601 (Japan), Fax: (+81) 3-5261-4631
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Abstract

Alkaline earth metal ions (Ca, Sr, and Ba) are doped into a NaTaO3 photocatalyst, yielding fine particles and surface structures with nanometer-scale “steps.” The formation of the surface nanostep structure depends on the amount of doped Sr and Ba. The photocatalytic water splitting over NaTaO3 is enhanced: NaTaO3 doped with 0.5 and 1.0 mol % of Sr shows high activities for photocatalytic water splitting without loading of a co-catalyst, and the photocatalytic activity is further improved by loading with a NiO co-catalyst.

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