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Journal of Renewable and Sustainable Energy / Volume 1 / Issue 2 / REGULAR ARTICLES

J. Renewable Sustainable Energy 1, 023101 (2009); http://dx.doi.org/10.1063/1.3096606 (7 pages)

Visible light photocatalytic properties of polymorphic brookite titania

Burtrand I. Lee1, Sujaree Kaewgun1, Wooyul Kim2, Wonyong Choi2, Jae S. Lee2, and Eunsun Kim2

1School of Materials Science of Engineering, Clemson University, Clemson, South Carolina 29634, USA
2Department of Chemical & Environmental Engineering, Pohang University of Science & Technology (POSTECH), Pohang, Republic of Korea

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(Received 3 November 2008; accepted 17 February 2009; published online 20 March 2009)

Visible light (VL) active titania was prepared via ambient condition sol process. The particles precipitated from titanium tetrachloride solution followed by lattice dehydroxylation using hot N-methylpyrrolidone (NMP) yielded a mixed crystal phase of brookite titania with anatase as the minor phase. The mixed phase titania exhibited superior photocatalytic activities for an organic dye and hydrogen evolution from an aqueous solution under 14 W VL as compared with several other available reference titanias. The superior VL photocatalytic activity may be explained as the effective charge separation by the intercrystalline electron transport from brookite to anatase grains complemented by the strong VL absorption by the nitrogen species in NMP. The probable electron transport mechanism is illustrated.

© 2009 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL
  3. RESULTS AND DISCUSSION
  4. CONCLUSIONS

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KEYWORDS and PACS

Keywords

catalysts, dyes, nanoparticles, nanotechnology, photochemistry, precipitation (physical chemistry), semiconductor materials, sols, titanium compounds

PACS

  • 82.50.Hp

    Processes caused by visible and UV light

  • 82.65.+r

    Surface and interface chemistry; heterogeneous catalysis at surfaces

  • 81.16.Be

    Chemical synthesis methods

  • 81.07.Wx

    Nanopowders

  • 82.70.Gg

    Gels and sols

  • 73.63.Bd

    Nanocrystalline materials

  • 88.30.E-

    Hydrogen production with renewable energy

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3096606

PUBLICATION DATA

ISSN

1941-7012 (print)  
1941-7012 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    S.-D. Mo and W. Y. Ching, Phys. Rev. B 51, 13023 (1995).


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