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Study of the oxidation state and the structural aspects of the V-doped TiO2

J. Appl. Phys. 106, 093503 (2009); doi:10.1063/1.3253761

Published 5 November 2009

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K. Bhattacharyya,1 S. Varma,1 A. K. Tripathi,1 D. Bhattacharyya,2 O. Mathon,3 and A. K. Tyagi1
1Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
2Spectroscopy Division, Bhabha Atomic Research Centre, Mumbai 400085, India
3European Synchrotron Radiation Facility, BP-220 Grenoble Cedex, France
A modified sol-gel method for synthesizing vanadium doped titania is being reported. These materials were thoroughly characterized for their oxidation states by electron paramagnetic resonance and x-ray absorption near edge structure and the local environment of the V-atom were investigated by the x-ray absorption fine structure. V-doped titania was found to be more active than nanotitania for photo-oxidation of methane in air under ambient conditions using UV-visible irradiation. The vanadium doping in the crystal lattice of titania leads to a mixture of oxidation states of 4+ and 5+ in the crystal lattice sites of the TiO2, which is crucial for its catalytic activity. ©2009 American Institute of Physics
History: Received 24 June 2009; accepted 27 September 2009; published 5 November 2009
Permalink: http://link.aip.org/link/?JAPIAU/106/093503/1
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KEYWORDS and PACS

Keywords
PACS
  • 82.50.Hp
    Chemical processes caused by visible and UV light
  • 82.65.+r
    Surface and interface chemistry; heterogeneous catalysis at surfaces
  • 81.20.Fw
    Sol-gel processing, precipitation
  • 76.30.Fc
    EPR of iron group (3d) ions and impurities (Ti-Cu)
  • 78.70.Dm
    X-ray absorption spectra (condensed matter)
  • 61.72.U-
    Doping and impurity implantation in crystals
  • YEAR: 2009

PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
Publisher:
AIP is a member of CrossRef AIP

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