Efficient Photocatalytic Hydrogen Evolution Under Visible Light Over a Mesoporous Titania Crystallized by Thermal Treatment in Hydrogen
TiO2 was prepared by a sol–gel method with TiCl4 as precursor and calcined under N2, Ar, air, and H2, respectively. The samples are subjected to various physiochemical characterizations. Our results showed that the reducing hydrogen gas atmosphere significantly affected the growth of TiO2 crystallite, leading to formation of mesoporous TiO2 with crystalline framework and high surface area. It also shows high photocatalytic activity for hydrogen production under visible light. Our report shows that the mesoporous TiO2 exhibiting high photocatalytic activity under visible light can be obtained by thermal treatment in certain atmosphere, needless of additional ionic doping which is often employed in traditional strategies. Our finding is believed to be useful for the batch production of TiO2 with high activity and especially with visible light response for the utilization of Solar hydrogen fuel production.
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Document Type: Research Article
Publication date: August 1, 2013
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