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Dependence of activity of rutile titanium(IV) oxide powder for photocatalytic overall water splitting on structural properties

Journal of Physical Chemistry C, ISSN: 1932-7455, Vol: 118, Issue: 17, Page: 9093-9100
2014
  • 60
    Citations
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  • 58
    Captures
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    60
    • Citation Indexes
      60
  • Captures
    58

Article Description

Rutile TiO powder having a band gap of 3.0 eV was studied as a photocatalyst for overall water splitting with respect to structural properties. The structures of rutile TiO samples were characterized by means of X-ray diffraction, scanning electron microscopy, photoacoustic spectroscopy, and a photoelectrochemical technique. It was found that rutile TiO particles that are photocatalytically active for the reaction exhibit a lower density of surface trapping states that slow water oxidation kinetics, as well as spatially separated reduction/oxidation sites at exposed crystal faces. This study also demonstrated that the photocatalytic activity of rutile TiO for overall water splitting, even when the material was well crystallized, was sensitive to defects that exist in (or near) the surface rather than in the bulk crystal. © 2014 American Chemical Society.

Bibliographic Details

Kazuhiko Maeda; Teruhisa Ohno; Naoya Murakami

American Chemical Society (ACS)

Materials Science; Energy; Chemistry

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