Photoreduction of nitrate ion and photoevolution of hydrogen on unsupported TiO2 and TiO2 pillared H4Nb6O17 nanocomposites

S. Tawkaew, Shu Yin, Tsugio Sato

    Research output: Contribution to journalArticlepeer-review

    37 Citations (Scopus)

    Abstract

    The photocatalytic evolution of hydrogen gas and reduction of nitrate ion were performed under irradiation of near UV-visible light (λ>290 nm) in the presence of photocatalysts such TiO2 (Degussa-P25), TiO/Pt, H4Nb6O17, H4Nb6O17/Pt, H4Nb6O17/TiO2 and H4Nb6O17/(Pt, TiO2) in aqueous methanol solution at 60°C. The hydrogen production activity was in the order H4Nb6O17/(Pt, TiO2)>H4 Nb6O17 /Pt>TiO2/Pt>H4 Nb6O17/TiO2 >H4Nb6O17>TiO2. The catalysts possessing high hydrogen evolution activity such as H4Nb6O17/(Pt, TiO2), H4Nb6O17/Pt, TiO2/Pt and H4Nb6O17/TiO2 showed no noticeable nitrate reducing activity. Consequently, only TiO2 and H4NB6O17 showed the nitrate ion photoreduction activity.

    Original languageEnglish
    Pages (from-to)855-859
    Number of pages5
    JournalInternational Journal of Inorganic Materials
    Volume3
    Issue number7
    DOIs
    Publication statusPublished - 2001 Jan 1

    Keywords

    • Hydrogen evolution
    • Layered niobate
    • Nitrate reduction
    • Photocatalytic reaction
    • Semiconductor pillar
    • Titania

    ASJC Scopus subject areas

    • Materials Chemistry

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