Room-Temperature Rutile TiO2 Nanoparticle Formation on Protonated Layered Titanate for High-Performance Heterojunction Creation

Kanji Saito, Satoshi Tominaka, Shun Yoshihara, Koji Ohara, Yoshiyuki Sugahara, Yusuke Ide

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    We report a methodology for creating protonated layered titanate-rutile heterojunctions on the outer particle surface of protonated layered titanate by treating layered potassium titanate (K0.8Ti1.73Li0.27O4) with dilute HCl and then drying it at room temperature under reduced pressure. After Pt co-catalyst loading, this protonated layered titanate/rutile composite with heterojunctions showed higher photocatalytic H2 evolution activity from water under simulated solar light compared to that of Pt-loaded P25, the standard photocatalyst for this reaction. The high photocatalytic activity was ascribable to enhanced photocatalytic activity of the protonated layered titanate based on an efficient charge separation at the protonated layered titanate-rutile heterojunction in addition to the sensitization effects of rutile, which absorbs light with longer wavelengths compared to those of protonated layered titanate.

    Original languageEnglish
    Pages (from-to)24538-24544
    Number of pages7
    JournalACS Applied Materials and Interfaces
    Volume9
    Issue number29
    DOIs
    Publication statusPublished - 2017 Jul 26

    Keywords

    • enhanced charge separation
    • heterojunction
    • hydrogen evolution from water
    • layered titanate
    • room temperature rutile formation

    ASJC Scopus subject areas

    • Materials Science(all)

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