School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, People's Republic of China; Institute for Advanced Study, Shenzhen University, Nanhai Avenue 3688, Shenzhen, 518060, People's Republic of China; College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, People's Republic of China.
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, PR China.
Chemosphere. 2022 Feb;288(Pt 3):132668. doi: 10.1016/j.chemosphere.2021.132668. Epub 2021 Oct 28.
BiOI belongs to the family of bismuth oxyhalides (BiOX, X = Cl, Br, I), having a unique layered structure with an internal electrostatic field that promotes the separation and transfer of photo-generated charge carriers. Interestingly, BiOI exhibits higher thermal stability compared to its other BiOX member compounds and absorption spectrum extended to the visible region. BiOI has demonstrated applications in diverse fields such as photocatalytic degradation of various organic pollutants, marine antifouling, etc. Unfortunately, owing to its wide band gap of ∼2.9 eV, its absorption lies mainly in the ultraviolet region, and a tiny portion of absorption lies in the visible region. Due to limited absorption, the photocatalytic performance of pure BiOI is still facing challenges. In order to reduce the band gap and increase the light absorption capability of BiOI, doping and formation of heterostructure strategies have been employed, which showed promising results in the photocatalytic performance. In addition, the plasmonic heterostructures of BiOI were also developed to further boost the efficiency of BiOI as a photocatalyst. Here, in this review article, we present such recent efforts made for the advanced development of BiOI regarding its synthesis, properties and applications. The strategies for photocatalytic performance enhancement have been discussed in detail. Moreover, in the conclusion section, we have presented the current challenges and discussed possible prospective developments in this field.
BiOI 属于铋氧卤化物（BiOX，X=Cl、Br、I）家族，具有独特的层状结构，内部存在静电场，可促进光生载流子的分离和转移。有趣的是，与其他 BiOX 成员化合物相比，BiOI 具有更高的热稳定性，并且吸收光谱扩展到可见光区域。BiOI 在光催化降解各种有机污染物、海洋防污等多个领域都有应用。然而，由于其 2.9eV 的宽带隙，其吸收主要集中在紫外区域，只有一小部分吸收在可见光区域。由于吸收有限，纯 BiOI 的光催化性能仍然面临挑战。为了降低带隙并提高 BiOI 的光吸收能力，已经采用了掺杂和形成异质结构的策略，这些策略在光催化性能方面显示出了有前途的结果。此外，还开发了 BiOI 的等离子体异质结构，以进一步提高 BiOI 作为光催化剂的效率。在本文中，我们综述了为提高 BiOI 的合成、性能和应用而进行的最新研究进展。详细讨论了提高光催化性能的策略。此外，在结论部分，我们提出了该领域当前的挑战，并讨论了可能的发展前景。
