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.

中文翻译：

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氟对光催化的影响

摘要 调整原始 TiO2 的微观结构对于缩小其带隙和延长电荷寿命至关重要。特别是，基于氟离子与 TiO2 之间的强络合和氟的高电负性，涉及氟的策略已成功用于调整 TiO2 光催化剂的表面化学、电子结构和形态，以提高其光催化活性。在这篇综述中，我们总结了涉及氟的策略，以建立高效的 TiO2 光催化系统或制造高效的 TiO2 光催化剂。主要的氟效应（即氟对光催化的影响）包括以下四个方面：（1）氟对TiO2光催化的表面效应，（2）氟掺杂对TiO2光催化的影响，(3) 氟介导的 TiO2 光催化剂形态的调整，以及 (4) 氟对非 TiO2 光催化的影响。此外，还综述了这些氟效应在光催化中的独特应用，包括污染物的选择性降解、化学品的选择性氧化、水分解产生 H2、还原 CO2 以生产太阳能燃料以及提高 TiO2 光催化剂的热稳定性。