BiOI nanosheets with dominantly exposed (001) and (110) facets were synthesized by different methods. The physicochemical properties of BiOI with different exposed surfaces were analyzed through characterization and experiments. It was found that the BiOI on the exposed main (001) facets showed better photogenerated electron scattering separation and transfer efficiency and better photocatalytic oxidation activity. It was speculated that the (001) crystal plane of BiOI was more conducive to the separation and migration of free radical carriers, which promoted the photocatalytic reaction. This work can provide directions for environmental purification applications by exposing dominant crystal planes to improve photocatalyst activity.

通过不同方法合成了主要暴露（001）和（110）面的BiOI纳米片。通过表征和实验分析了BiOI在不同暴露表面下的理化性质。发现暴露的主（001）面上的BiOI表现出更好的光生电子散射分离和转移效率以及更好的光催化氧化活性。推测BiOI的（001）晶面更有利于自由基载体的分离和迁移，从而促进了光催化反应。这项工作可以通过暴露主晶面以改善光催化剂活性，为环境净化应用提供指导。