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Photocatalytic H2 Evolution under Visible-Light Irradiation on Modified TiO2 Catalysts

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Abstract:

This TiO2 catalyst is modified by two means of doping and dye-sensitization to decompose the water into hydrogen under visible light irradiation in this paper. By exploring the mechanisms of the modification with two ways, it is found that the modification can make TiO2 semiconductor with only UV photocatalytic activity become a catalyst with the visible-light activity. The experiments demonstrate that quantum efficiency and energy conversion efficiency of the doped catalyst is respectively 1.5% and 0.5%, and that of the sensitized catalyst is respectively 2.13% and 0.89%. By comparison the doped TiO2 catalysts have better prospect in the application because of the instability of the sensitized catalyst.

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Periodical:

Advanced Materials Research (Volumes 512-515)

Pages:

1426-1431

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.512-515.1426

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Online since:

May 2012

Authors:

Hui Rong Liang, Lie Jin Guo

Keywords:

Hydrogen Evolution, Photocatalyst, Titanium Dioxide (TiO2)

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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