Chinese Journal of Catalysis ›› 2020, Vol. 41 ›› Issue (10): 1451-1467.DOI: 10.1016/S1872-2067(20)63594-X

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Effects of fluorine on photocatalysis

Xiaofang Lib, Xiaofeng Wua,f, Shengwei Liuc, Yuhan Lid, Jiajie Fane, Kangle Lva   

  1. a Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Enducation, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, Hubei, China;
    b College of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China;
    c School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, Guangdong, China;
    d Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China;
    e School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China;
    f Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven, The Netherlands
  • Received:2020-02-17 Revised:2020-03-25 Online:2020-10-18 Published:2020-08-15
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51672312, 51808080, 21373275, 51872341, 51572209), the Fundamental Research Funds for the Central Universities, South-Central University for Nationalities (CZT20016), China "Post-Doctoral Innovative Talent Support Program" (BX20180056), the Natural Science Foundation Project of CQ CSTC (cstc2018jcyjA3794), China Postdoctoral Science Foundation (2018M643788XB), Science and Technology Research Project of Chongqing Education Commission Foundation (KJQN201800826, KJZDK201800801), Venture & Innovation Support Program for Chongqing Overseas Returnees (cx2018130), and Chongqing Technology and Business University Research Foundation Project (1856039).

Abstract: Tailoring the microstructure of pristine TiO2 is essential to narrow its band gap and prolong the charge lifetime. In particular, strategies involving fluorine have been used successfully to tune the surface chemistry, electronic structure, and morphology of TiO2 photocatalysts to improve their photocatalytic activity based on the strong complexation between fluoride ions and TiO2 and the high electronegativity of fluorine. In this review, we summarize the strategies involving fluorine to establish highly efficient TiO2 photocatalytic systems or fabricate highly efficient TiO2 photocatalysts. The main fluorine effects (i.e. the effects of fluorine on photocatalysis) include the following four aspects:(1) Surface effects of fluoride on TiO2 photocatalysis, (2) effects of fluorine doping on TiO2 photocatalysis, (3) fluoride-mediated tailoring of the morphology of TiO2 photocatalysts, and (4) the effects of fluorine on non-TiO2 photocatalysis. Additionally, the unique applications of these fluorine effects in photocatalysis, including selective degradation of pollutants, selective oxidation of chemicals, water-splitting to produce H2, reduction of CO2 to produce solar fuels, and improvement of the thermostability of TiO2 photocatalysts, are reviewed.

Key words: TiO2, Fluorine, Photocatalysis, Doping, Surface modification