H-2 evolution under visible light irradiation on La and Cr co-doped NaTaO3 prepared by spray pyrolysis from polymeric precursor

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Photocatalysts of Na1-xLaxTa1-xCrxO3 and NaTa1-xCrxO3 were prepared by spray pyrolysis from aqueous and polymeric precursor solution. Apart from the contribution of La3+ ions co-doped into NaTa1-xCrxO3 on the BET surface area and the surface morphology by preventing crystal growth, this co-doping contributed to the increased Cr3+ concentration by partially tuning the electron configuration from A(+)B(5+)O(3) to (A(+)A'(3+))(2+)(B5+B'(3+))O-4+(3) in the lattice of the photocatalyst. Na1-xLaxTa1-xCrxO3 prepared from polymeric precursor solution reduced the induction period to 33% and enhanced the hydrogen evolution rate 5.6-fold to 1467.5 mu mol g(-1) h(-1) compared with the equivalent values of NaTa1-xCrxO3 prepared from aqueous precursor. The optimum amounts of dopant and additives comprising the polymeric precursor to maximize the hydrogen evolution rate were x = 0.003 and 300 mol%, respectively. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2013-05
Language
English
Article Type
Article
Keywords

AQUEOUS-METHANOL SOLUTION; PHOTOCATALYTIC HYDROGEN-PRODUCTION; SRTIO3; WATER; PARTICLES; CHROMIUM; METAL; ABSORPTION; LANTHANUM; IRON

Citation

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.38, no.15, pp.6323 - 6334

ISSN
0360-3199
DOI
10.1016/j.ijhydene.2013.03.048
URI
http://hdl.handle.net/10203/174052
Appears in Collection
CBE-Journal Papers(저널논문)
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