Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 33, Issue 22, Pages 6432-6438Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2008.08.048
Keywords
Semiconductors; Chemical synthesis; Photocatalytic properties
Categories
Funding
- National Natural Science Foundation of China [50572030, 50372022]
- Key Scientific Technology Program of Fujian Province, China [005HZ01-4, 2006JO439]
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The photocatalysts H1-xLaxCa2-xNb3O10 (x = 0, 0.25, 0.5, 0.75) was synthesized by conventional solid state reaction followed by an ion-exchange reaction. They were characterized by power X-ray diffraction, UV-vis diffusive reflectance and scan electron microscope. The effect of substitution of La3+ for Ca2+ in HCa2Nb3O10 has been studied on the photocatalytic decomposition of water under UV light irradiation with methanol as electron donor and Pt as promoter catalyst. Both the optical property and photocatalytic activity of H1-xLaxCa2-xNb3O10 were varied by the substitution of La3+ for Ca3+. The x value in H1-xLaxCa2-xNb3O10 had an important effect on the photocatalytic activity of the catalyst. When the x=0.5, the H1-xLaxCa2-xNb3O10/Pt showed a photocatalytic activity of 169 cm(3) h(-1) g(-1) hydrogen evolution rate in 10 vol.% methanol solution under irradiation from a 100 W mercy lamp at 333 K. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
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