Citation: Lijuan Deng, Yi Xie, Gaoke Zhang. Synthesis of C-Cl-codoped titania/attapulgite composites with enhanced visible-light photocatalytic activity[J]. Chinese Journal of Catalysis, ;2017, 38(2): 379-388. doi: 10.1016/S1872-2067(17)62774-8 shu

Synthesis of C-Cl-codoped titania/attapulgite composites with enhanced visible-light photocatalytic activity

Lijuan Deng ^a,b, ,
Yi Xie ^a ,
Gaoke Zhang ^a,b

a State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, Hubei, China;
b Hubei Key Laboratory of Mineral Resources Processing, Hubei Provincial Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources, and School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China

Received Date: 21 October 2016
Revised Date: 23 December 2016

Fund Project: This work was supported by the National Basic Research Program of China (973 Program, 2007CB613302) and the Natural Science Foundation of Hubei Province (2016CFA078).

We demonstrate the synthesis of C-Cl-codoped titania/attapulgite (TiO₂/ATT) composites containing a mixture of TiO₂ phases by a facile sol-gel method at 70℃ using titanium tetraisopropoxide as the TiO₂ precursor and ATT as a support for the TiO₂ nanoparticles. The photocatalytic activity of the C-Cl-codoped TiO₂/ATT composites with mixed anatase/brookite/rutile phases obtained at pH=3.0 was much higher than that of commercially available Degussa P25 for the photocatalytic degradation of acid red G under visible-light irradiation. The excellent photocatalytic activity of the developed composite originates from the nonmetal codoping, which extends the absorption edge of TiO₂ into visible region, and the presence of multiple phases, which slow the recombination of photoexcited electron/hole pairs. The formation of hydroxyl radicals during the photocatalytic degradation process was detected by photoluminescence probing using terephthalic acid. A mechanism for photocatalysis over the C-Cl-codoped TiO₂/ATT composites was proposed.
- Anatase,
- Rutile,
- Brookite,
- Attapulgite,
- C-Cl-codoped titania,
- Visible light
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