Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 37, Issue 2, Pages 1356-1365Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2011.09.133
Keywords
TiO2; Microspheres; Carbon incorporation; Flame assisted hydrolysis; Hydrogen production; Photocatalytic activity
Categories
Funding
- National Basic Research Program of China (973 Program) [2010CB933703, 2011CB933300]
- Shanghai Science and Technology Commission [1052nm01800]
- Fudan University
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We report a novel and facile energy-saving method to prepare microspherical carbon-incorporated titania powders by flame assisted hydrolysis of tetrabutyl orthotitanate. The as-prepared samples were fully characterized by XRD, SEM, XPS, UV-Vis absorption spectra and photocatalytic hydrogen production. Anatase TiO2 can be obtained directly without any post heat treatment. The as-prepared TiO2 is formed of microspheres with sizes in a range of 0.5 similar to 2.0 mu m. XPS measurement shows the presence of carbon species which come from the incomplete combustion of organic compounds. Enhanced photocatalytic hydrogen production rates were observed for the as-prepared samples. A maximum hydrogen production rate was 8.1 mu mol h(-1), which was 1.8 times larger than that of Degussa P25. The improved photocatalytic activity is attributed to enhanced light absorption behavior, which is caused by carbon incorporation and microspherical structure. This work demonstrates a novel and efficient strategy to synthesize microspherical anatase TiO2 photocatalyst without any special equipment or setup. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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