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Visible-light activation of TiO2 photocatalysts: Advances in theory and experiments
Journal of Photochemistry and Photobiology C: Photochemistry Reviews ( IF 13.6 ) Pub Date : 2015-08-28 , DOI: 10.1016/j.jphotochemrev.2015.08.003
Vinodkumar Etacheri , Cristiana Di Valentin , Jenny Schneider , Detlef Bahnemann , Suresh C. Pillai

The remarkable achievement by Fujishima and Honda (1972) in the photo-electrochemical water splitting results in the extensive use of TiO2 nanomaterials for environmental purification and energy storage/conversion applications. Though there are many advantages for the TiO2 compared to other semiconductor photocatalysts, its band gap of 3.2 eV restrains application to the UV-region of the electromagnetic spectrum (λ ≤ 387.5 nm). As a result, development of visible-light active titanium dioxide is one of the key challenges in the field of semiconductor photocatalysis. In this review, advances in the strategies for the visible light activation, origin of visible-light activity, and electronic structure of various visible-light active TiO2 photocatalysts are discussed in detail. It has also been shown that if appropriate models are used, the theoretical insights can successfully be employed to develop novel catalysts to enhance the photocatalytic performance in the visible region. Recent developments in theory and experiments in visible-light induced water splitting, degradation of environmental pollutants, water and air purification and antibacterial applications are also reviewed. Various strategies to identify appropriate dopants for improved visible-light absorption and electron–hole separation to enhance the photocatalytic activity are discussed in detail, and a number of recommendations are also presented.



中文翻译:

TiO 2光催化剂的可见光活化:理论与实验进展

藤岛和本田(1972)在光电化学水分解中的杰出成就导致TiO 2纳米材料广泛用于环境净化和能量存储/转换应用。虽然存在用于在TiO许多优点2相比其他半导体光催化剂,为3.2eV性约束应用到电磁光谱的UV区域的其带隙(λ  ≤387.5纳米)。结果,可见光活性二氧化钛的开发是半导体光催化领域中的关键挑战之一。在这篇综述中,可见光活化,可见光活性的起源以及各种可见光活性TiO 2的电子结构的策略方面的进展。详细讨论了光催化剂。还已经表明,如果使用合适的模型,则理论上的见解可以成功地用于开发新型催化剂以增强可见光区域的光催化性能。还回顾了在可见光诱导的水分解,环境污染物的降解,水和空气净化以及抗菌应用方面的理论和实验的最新进展。详细讨论了各种确定合适的掺杂剂以改善可见光吸收和电子-空穴分离以增强光催化活性的策略,并提出了许多建议。

更新日期:2015-08-28
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