Photocatalytic H 2 evolution under visible-light irradiation on modified TiO 2 catalysts

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Abstract

This TiO 2 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 TiO 2 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 TiO 2 catalysts have better prospect in the application because of the instability of the sensitized catalyst.

Original languageEnglish
Title of host publicationRenewable and Sustainable Energy II
Pages1426-1431
Number of pages6
DOIs
StatePublished - 2012
Event1st International Conference on Energy and Environmental Protection, ICEEP 2012 - Hohhot, China
Duration: 23 Jun 201224 Jun 2012

Publication series

NameAdvanced Materials Research
Volume512-515
ISSN (Print)1022-6680

Conference

Conference1st International Conference on Energy and Environmental Protection, ICEEP 2012
Country/TerritoryChina
CityHohhot
Period23/06/1224/06/12

Keywords

  • Hydrogen evolution
  • Photocatalyst
  • Titanium dioxide

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