Fabrication of BiOI nanosheets with exposed (001) and (110) facets with different methods for photocatalytic oxidation elemental mercury

• Published in: Colloid and interface science communications Vol. 40; p. 100357
• Main Authors: Xiao, Yixuan, Wu, Jiang, Jia, Tao, Li, Tong, Wang, Ziqian, Qi, Yongfeng, Liu, Qizhen, Qi, Xuemei, He, Ping
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2021
• Subjects: and facets; BiOI nanosheets; Mercury; Photocatalytic oxidation; Selectively exposed facets; BiOI nanosheets; and facets; Selectively exposed facets; Mercury; Photocatalytic oxidation
• ISSN: 2215-0382; 2215-0382
• DOI: 10.1016/j.colcom.2020.100357

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. [Display omitted] •BiOI nanosheets with mainly exposed (001) and (110) faces were synthesized by different methods.•The BiOI pairs exposed on different crystal faces have different separation efficiency and photocatalytic activity.•The BiOI exposed main (001) surface showed better photogenerated charge separation and transfer efficiency.•The possible charge transfer and Hg0 removal reaction mechanism were proposed