State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Luoshi Road 122#, Wuhan 430070, PR China.
Adv Colloid Interface Sci. 2012 May 15;173:35-53. doi: 10.1016/j.cis.2012.02.004. Epub 2012 Feb 28.
Semiconductor photocatalysts are of great significance in solar energy conversion and environmental remediation. To overcome serious drawbacks of these materials with respect to narrow light-response range and low quantum efficiency, a variety of strategies have been developed in the past decades to enhance the light harvesting and excitation as well as the charge transfer against recombination. In particular, fluorination of semiconductor photocatalysts can be employed to modify their surface and bulk properties, and consequently, to enhance their photocatalytic performance. This review presents a comprehensive description of the F-mediated synthesis and unique properties of fluorinated semiconductor photocatalysts, in particular titanium dioxide (TiO(2)). The available strategies for the synthesis of fluorinated photocatalysts include post-synthesis fluorination and in-situ fluorination. Depending on the synthesis route and conditions, it is possible to control the chemical nature of incorporated fluorine (such as adsorbed fluoride and lattice-doped fluorine) and the fluoride-mediated crystal modification and organization, which often results in exceptional surface and bulk physicochemical properties, giving rise to unique photocatalytic properties. Significantly, the surface fluorination induces unusual adsorption behavior and interfacial charge transfer dynamics, directly affecting photocatalytic redox properties of the surface-fluorinated photocatalysts. The lattice fluorine-doping, sole or cooperative with other complementary co-dopants, introduces special localized electronic structures and surface defect states, accounting for the exceptional visible-light photoactivity of the fluorine-doped photocatalysts. Finally, recent advances in the synthesis and properties of fluorinated photocatalysts are summarized along with perspectives on further developments in this area of research.
半导体光催化剂在太阳能转换和环境修复方面具有重要意义。为了克服这些材料在光响应范围窄和量子效率低方面的严重缺陷，在过去几十年中开发了各种策略来增强光捕获和激发以及抑制复合的电荷转移。特别是，半导体光催化剂的氟化可以用来修饰其表面和体相性质，从而提高其光催化性能。本综述全面介绍了 F 介导的氟化半导体光催化剂，特别是二氧化钛（TiO(2)）的合成和独特性质。氟化光催化剂的合成策略包括后合成氟化和原位氟化。根据合成路线和条件，可以控制所掺入氟的化学性质（如吸附的氟化物和晶格掺杂的氟化物）以及氟化物介导的晶体修饰和组织，这通常会导致异常的表面和体相物理化学性质，从而产生独特的光催化性质。重要的是，表面氟化会引起不寻常的吸附行为和界面电荷转移动力学，直接影响表面氟化光催化剂的光催化氧化还原性质。晶格氟掺杂，单独或与其他互补共掺杂剂合作，引入了特殊的局域电子结构和表面缺陷态，解释了氟掺杂光催化剂的异常可见光光活性。最后，总结了氟化光催化剂的合成和性质的最新进展，并对该研究领域的进一步发展进行了展望。
