Department of Photonics, National Sun Yat-sen University, No. 70, Lien-Hai Rd, Kaohsiung 80424, Taiwan.
Department of Physics, SRM Institute of Science and Technology, Ramapuram Campus, Chennai 600089, Tamil Nadu, India.
Int J Mol Sci. 2022 Jul 24;23(15):8143. doi: 10.3390/ijms23158143.
TiO has aroused considerable attentions as a promising photocatalytic material for decades due to its superior material properties in several fields such as energy and environment. However, the main dilemmas are its wide bandgap (3-3.2 eV), that restricts the light absorption in limited light wavelength region, and the comparatively high charge carrier recombination rate of TiO, is a hurdle for efficient photocatalytic CO conversion. To tackle these problems, lots of researches have been implemented relating to structural and material modification to improve their material, optical, and electrical properties for more efficient photocatalytic CO conversion. Recent studies illustrate that crystal facet engineering could broaden the performance of the photocatalysts. As same as for nanostructures which have advantages such as improved light absorption, high surface area, directional charge transport, and efficient charge separation. Moreover, strategies such as doping, junction formation, and hydrogenation have resulted in a promoted photocatalytic performance. Such strategies can markedly change the electronic structure that lies behind the enhancement of the solar spectrum harnessing. In this review, we summarize the works that have been carried out for the enhancement of photocatalytic CO conversion by material and structural modification of TiO and TiO-based photocatalytic system. Moreover, we discuss several strategies for synthesis and design of TiO photocatalysts for efficient CO conversion by nanostructure, structure design of photocatalysts, and material modification.
几十年来，TiO 因其在能源和环境等多个领域的优越材料特性而引起了相当多的关注，是一种很有前途的光催化材料。然而，其主要困境是带隙较宽（3-3.2eV），限制了在有限波长区域的光吸收，以及 TiO 的相对较高的电荷载流子复合率，这是高效光催化 CO 转化的一个障碍。为了解决这些问题，已经进行了许多关于结构和材料改性的研究，以改善其材料、光学和电学性能，从而实现更高效的光催化 CO 转化。最近的研究表明，晶面工程可以拓宽光催化剂的性能。与纳米结构一样，它们具有提高光吸收、增加比表面积、定向电荷输运和有效电荷分离等优点。此外，掺杂、结形成和氢化等策略也导致了光催化性能的提高。这些策略可以显著改变电子结构，从而增强对太阳光谱的利用。在这篇综述中，我们总结了通过 TiO 和 TiO 基光催化体系的材料和结构改性来提高光催化 CO 转化的工作。此外，我们还讨论了通过纳米结构、光催化剂结构设计和材料改性来合成和设计高效 CO 转化的 TiO 光催化剂的几种策略。
