H-2 evolution under visible light irradiation from aqueous methanol solution on SrTiO3:Cr/Ta prepared by spray pyrolysis from polymeric precursor

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SrTiO3:Cr/Ta powders were prepared by spray pyrolysis from polymeric precursors. Effects of the amount of co-dopant and additives on the photocatalytic activity for hydrogen evolution from aqueous methanol solution under visible light irradiation (lambda > 415 nm) were investigated. For the photocatalyst prepared by spray pyrolysis from polymeric precursor, the hydrogen evolution rate was increased by a factor of similar to 100 and induction period was decreased by a factor of 8 compared with a photocatalyst prepared by solid state reaction. These enhancements result from increased roughness of surface, and the compositional uniformity which are intrinsic characteristics of spray pyrolysis. In addition, photocatalyst prepared by spray pyrolysis from polymeric precursor have large BET surface area and small amount of Cr6+ ion which is responsible for long induction period. It should be noted that the reduction of Cr6+ ion was achieved without hydrogen reduction process. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2011-08
Language
English
Article Type
Article
Keywords

PHOTOCATALYTIC PROPERTIES; NATAO3 PHOTOCATALYSTS; SOLID-SOLUTION; DOPED SRTIO3; WATER; CHROMIUM; PARTICLES; O-2; SERIES

Citation

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.36, no.16, pp.9496 - 9504

ISSN
0360-3199
DOI
10.1016/j.ijhydene.2011.05.094
URI
http://hdl.handle.net/10203/100206
Appears in Collection
CBE-Journal Papers(저널논문)
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