The hydrothermal and solvothermal synthesis of LiTaO3 photocatalyst: Suppressing the deterioration of the water splitting activity without using a cocatalyst

Soichi Takasugi, Koji Tomita, Michio Iwaoka, Hideki Kato, Masato Kakihana

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    19 Citations (Scopus)

    Abstract

    Abstract LiTaO3 photocatalysts having high water splitting activity in the absence of cocatalyst were synthesized using hydrothermal and solvothermal methods. The particle size of the hydrothermally synthesized LiTaO3 was 500-3000 nm, and the H2 generation rate under ultraviolet irradiation without cocatalyst was as low as 8 μmol/h. Conversely, LiTaO3 synthesized by the solvothermal method using acetone as the solvent showed high H2 generation rate of over 600 μmol/h. The Brunauer-Emmett-Teller surface area of the solvothermally synthesized LiTaO3 was 23.7 m2/g, and the particle size was 10-30 nm. In the long-term water splitting experiment on the LiTaO3 synthesized by the solvothermal method, the H2 generation rates did not change for 30 d, and the catalytic turnover number was 510.

    Original languageEnglish
    Article number15536
    Pages (from-to)5638-5643
    Number of pages6
    JournalInternational Journal of Hydrogen Energy
    Volume40
    Issue number16
    DOIs
    Publication statusPublished - 2015 May 4

    Keywords

    • Cocatalyst
    • Deterioration of photocatalyst
    • Hydrothermal method
    • LiTaO
    • Solvothermal method
    • Water splitting photocatalyst

    ASJC Scopus subject areas

    • Renewable Energy, Sustainability and the Environment
    • Fuel Technology
    • Condensed Matter Physics
    • Energy Engineering and Power Technology

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