Synthesis and photocatalytic degradation performance of BiOBr nanoflowers with tunable exposed (001) facet and band gap

• Published in: Inorganic chemistry communications Vol. 164; p. 112386
• Main Authors: Zhou, Yan, Zhao, Hong-jian, Ma, Fu, Li, Xu, Miao, Xiao-shan, Han, Zheng-bing
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2024
• Subjects: Cd2; Facets; Hydroxyl radical; Cd2; Facets; Hydroxyl radical
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2024.112386

[Display omitted] •The introduction of Cd2+ in the synthesized BiOBr solution promotes the transformation of the primary exposed facets of BiOBr from (0 1 0) to (0 0 1).•The introduction of Cd2+ in the synthesized BiOBr solution causes a change in the band position of BiOBr, resulting in the generation of ∙OH during the photocatalytic degradation process.•The Cd2+ added to the BiOBr solution synthesized at room temperature almost did not enter the BiOBr nanoflowers, allowing the remaining mother liquor (containing Cd2+) from the synthesis of BiOBr to be recycled for the synthesis of BiOBr with the main exposed (0 0 1) facet. The introduction of Cd2+ to the reaction solution at room temperature is observed to transform the primary exposed facets of BiOBr from (0 1 0) to (0 0 1), affecting its morphology and altering the positions of valence and conduction bands. This modification causes the production of hydroxyl radicals (∙OH) in BiOBr. Electrochemical characterization reveals that the addition of Cd2+ enhances the separation efficiency and transfer rate of photogenerated carriers in BiOBr, ultimately enhancing its photocatalytic performance. Notably, subsequent experiments with other metal ions, such as Co2+, Mn2+, etc., also have similar effects on BiOBr.