Journal Article In situ synthesis of ordered mesoporous Co-doped TiO2 and its enhanced photocatalytic activity and selectivity for the reduction of CO2

Wang, Tao  ,  Meng, Xianguang  ,  Liu, Guigao  ,  Chang, Kun  ,  Li, Peng  ,  Kang, Qing  ,  Liu, Lequan  ,  Li, Mu  ,  Ouyang, Shuxin  ,  Ye, Jinhua

3 ( 18 )  , pp.9491 - 9501 , 2015-05-14 , Royal Society of Chemistry
Ordered mesoporous cobalt-doped titanium dioxide was successfully synthesized by a multicomponent self-assembly process. The doped Co species change the construction of the conduction band and valence band of TiO2, leading to visible-light absorption for TiO2. The designed cobalt-doped titanium dioxide exhibits a higher visible light activity for the reduction of CO2 among the commonly reported photocatalysts. In addition, the selectivity of the reduction products is improved by optimizing the energy-band configurations of cobalt-doped titanium dioxide through varying the molar ratio of Co/Ti. When the doping content of cobalt species increases to some extent, Co3O4/Co-doped TiO2 nanocomposites with oxygen vacancies were obtained, which markedly improve the generation rate of CH4.

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