Expansion of the photoresponse window of a BiVO4 photocatalyst by doping with chromium(vi)

Kazuya Okuno, Hideki Kato, Junie Jhon M. Vequizo, Akira Yamakata, Hisayoshi Kobayashi, Makoto Kobayashi, Masato Kakihana

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    Doping of Cr6+ into BiVO4 was examined in this study. A new absorption band with a 1.84 eV energy threshold appeared with Cr-doping. The theoretical band calculation has revealed that the new absorption is ascribed to the electron transition from the valence band to acceptor levels formed by empty Cr 3d orbitals. It was confirmed that photocatalytic water oxidation in the presence of Ag+ or Fe3+ of an oxidizing reagent was induced by excitation of the new absorption although activity under band gap excitation decreased with Cr-doping. Characteristics of carrier dynamics were also investigated by transient absorption spectroscopy.

    Original languageEnglish
    Pages (from-to)38140-38145
    Number of pages6
    JournalRSC Advances
    Volume8
    Issue number67
    DOIs
    Publication statusPublished - 2018

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)

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