Jing-ying Shi, Wen-hua Leng, Jiang-lin Cao, Jian-qing Zhang, Chu-nan Cao. Effect of Cobalt Precursor on Microstructures and Visible Light Photoactivity of Doped TiO2 Powders[J]. Chinese Journal of Chemical Physics , 2006, 19(5): 463-468. doi: 10.1360/cjcp2006.19(5).463.6
Citation: Jing-ying Shi, Wen-hua Leng, Jiang-lin Cao, Jian-qing Zhang, Chu-nan Cao. Effect of Cobalt Precursor on Microstructures and Visible Light Photoactivity of Doped TiO2 Powders[J]. Chinese Journal of Chemical Physics , 2006, 19(5): 463-468. doi: 10.1360/cjcp2006.19(5).463.6

Effect of Cobalt Precursor on Microstructures and Visible Light Photoactivity of Doped TiO2 Powders

doi: 10.1360/cjcp2006.19(5).463.6
Funds:  This work was supported by National Natural Science Council of China (No.20107006, 20373062) and Bureau of Science and Technology in Quanzhou, Fujian Province (No.2003Z10).
  • Received Date: 2005-09-14
  • In order to develop photoactive cobalt-doped TiO2 for the degradation of organic pollutants using visible light irradiation, the effects of cobalt precursor on TiO2 microstructure were investigated. Three cobaltprecursors, i.e. CoCl2, Co(NO3)2 and CoSO4 with two doping levels (nominally 1% and 10%), and two annealing temperatures (400 and 800 ℃) were adopted to prepare the doped titania through the sol-gel method. The powder samples were characterized with XRD, SEM, BET surface area analysis and UV-Vis absorption spectroscopy, and their photocatalytic activities were evaluated by the degradation of aniline under visible light irradiation. The results showed that the distribution of titania phases, particle size,morphology, surface area and the optical absorption of the catalysts were greatly dependent on the cobalt precursors. Samples prepared from Co(NO3)2, especially for those doped at 1% and calcined at 400 ℃,showed the highest photocatalytic activity towards the degradation of aniline, and the possible reasons are discussed briefly.
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Effect of Cobalt Precursor on Microstructures and Visible Light Photoactivity of Doped TiO2 Powders

doi: 10.1360/cjcp2006.19(5).463.6
Funds:  This work was supported by National Natural Science Council of China (No.20107006, 20373062) and Bureau of Science and Technology in Quanzhou, Fujian Province (No.2003Z10).

Abstract: In order to develop photoactive cobalt-doped TiO2 for the degradation of organic pollutants using visible light irradiation, the effects of cobalt precursor on TiO2 microstructure were investigated. Three cobaltprecursors, i.e. CoCl2, Co(NO3)2 and CoSO4 with two doping levels (nominally 1% and 10%), and two annealing temperatures (400 and 800 ℃) were adopted to prepare the doped titania through the sol-gel method. The powder samples were characterized with XRD, SEM, BET surface area analysis and UV-Vis absorption spectroscopy, and their photocatalytic activities were evaluated by the degradation of aniline under visible light irradiation. The results showed that the distribution of titania phases, particle size,morphology, surface area and the optical absorption of the catalysts were greatly dependent on the cobalt precursors. Samples prepared from Co(NO3)2, especially for those doped at 1% and calcined at 400 ℃,showed the highest photocatalytic activity towards the degradation of aniline, and the possible reasons are discussed briefly.

Jing-ying Shi, Wen-hua Leng, Jiang-lin Cao, Jian-qing Zhang, Chu-nan Cao. Effect of Cobalt Precursor on Microstructures and Visible Light Photoactivity of Doped TiO2 Powders[J]. Chinese Journal of Chemical Physics , 2006, 19(5): 463-468. doi: 10.1360/cjcp2006.19(5).463.6
Citation: Jing-ying Shi, Wen-hua Leng, Jiang-lin Cao, Jian-qing Zhang, Chu-nan Cao. Effect of Cobalt Precursor on Microstructures and Visible Light Photoactivity of Doped TiO2 Powders[J]. Chinese Journal of Chemical Physics , 2006, 19(5): 463-468. doi: 10.1360/cjcp2006.19(5).463.6

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