Charge separation at the rutile/anatase interface: A dominant factor of photocatalytic activity

Takahira Miyagi, Masayuki Kamei, Takefumi Mitsuhashi, Takamasa Ishigaki, Atsushi Yamazaki

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    116 Citations (Scopus)

    Abstract

    Epitaxial and polycrystalline anatase films were grown by pulse-powered magnetron sputtering. The photoreduction of Ag ions showed the difference in the distribution of the photocatalytic active sites in these films. The polycrystalline anatase film was covered with an Ag layer. In contrast, discrete Ag particles were interspatially deposited on the epitaxial anatase film. Evaluation of the epitaxial film by micro-Raman spectrometry revealed that the rutile coexisted at only the site where the Ag particle was precipitated. These results suggest that the rutile/anatase interface is the active site for photocatalysis and is one of the dominant factors of the photocatalytic activity.

    Original languageEnglish
    Pages (from-to)399-402
    Number of pages4
    JournalChemical Physics Letters
    Volume390
    Issue number4-6
    DOIs
    Publication statusPublished - 2004 Jun 1

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    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry
    • Spectroscopy
    • Atomic and Molecular Physics, and Optics

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