Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 37, Issue 20, Pages 15038-15044Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2012.08.021
Keywords
SiC nanowires; Photocatalysis; Hydrogen evolution; Water splitting; Surface modification
Categories
Funding
- NSFC [21173251]
- SXICC [2011SQNRC18]
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beta-SiC nanowires were synthesized by simple carbothermal reduction of a mixture composed of low-cost water glass and starch, and characterized by XRD, SEM, TEM, BET, UV-visible absorption, FT-IR spectrometer and X-ray photoelectron spectrometer. The results show that the beta-SiC nanowires can absorb visible light and exhibit excellent photocatalytic hydrogen evolution performance from pure water under visible light irradiation. The hydrogen evolution rate can reach more than 60 mu L/g.h. siC nanowires by simple modification can greatly enhance the efficiency of H-2 production. Average H2 production rate over the modified SiC is 76.1% higher than that of unmodified SiC. The enhanced H-2 production is mainly due to stronger hydrophilic ability of the modified SiC. In addition, O-2 is detectable in the experiment, indicating that water has been decomposed into H-2 and O-2. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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