Citation: Honglin Gao, Jianmei Liu, Jin Zhang, Zhongqi Zhu, Genlin Zhang, Qingju Liu. Influence of carbon and yttrium co-doping on the photocatalytic activity of mixed phase TiO₂[J]. Chinese Journal of Catalysis, ;2017, 38(10): 1688-1696. doi: 10.1016/S1872-2067(17)62893-6 shu

Influence of carbon and yttrium co-doping on the photocatalytic activity of mixed phase TiO₂

School of Materials Science and Engineering, Yunnan Key Laboratory for Micro/nano Materials & Technology, Yunnan University, Kunming 650091, Yunnan, China

Received Date: 31 May 2017
Revised Date: 30 July 2017

Fund Project: This work was supported by the National High Technology Research and Development Program of China (863 Program, 2015AA034601), the Natural Science Foundation of Yunnan Province (2016FB084), the Scientific Research Foundation of the Department of Education of Yunnan Province (2015Z003), and the Open Fund of Yunnan Key Laboratory for Micro/nano Materials & Technology (ZZ2016006).

Mixed phase TiO₂ photocatalysts doped with C and Y were synthesized by a sol-gel process. The effects of C and Y doping and annealing temperatures on the structural and optical properties, and photocatalytic activity were investigated. We found that both C and Y doping can broaden the absorption spectrum of TiO₂ to the visible light region and inhibit recombination of photogenerated electron/hole pairs. The incorporation of Y into the TiO₂ lattice inhibited growth of crystalline grains, which increased the specific surface area and enhanced the photocatalytic activity. The photocatalytic performance of the samples was investigated in the photocatalytic degradation of methyl blue under visible light irradiation. The rate of methyl blue degradation over the (C, Y)-co-doped TiO₂ sample was much higher than those of undoped TiO₂, C-TiO₂, and Y-TiO₂. Additionally, the apparent first-order rate constant of the co-doped sample was 3.5 times as large as that of undoped mix phase TiO₂ under the same experimental conditions. The enhanced photocatalytic activity can be attributed to the synergic effect of (C, Y)-co-doping and the formation of an appropriate crystalline structure.
- Titanium dioxide,
- Co-doping,
- Mixed phase,
- Phase control,
- Visible light photocatalysis
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沈阳化工大学材料科学与工程学院沈阳 110142

Influence of carbon and yttrium co-doping on the photocatalytic activity of mixed phase TiO2

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Influence of carbon and yttrium co-doping on the photocatalytic activity of mixed phase TiO₂