Facile synthesis, structure and enhanced photocatalytic activity of novel BiOBr/Bi(C₂O₄)OH composite photocatalysts

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• 作者：ZhangSheng Liu ; ^{lzsliu2008@hotmail.com" class="auth_mail" title="E-mail the corresponding author} ; HaiYang Wang ; GuoQing Pan ; JiNan Niu ; PeiZhong Feng
• 关键词：Photocatalytic activity ; BiOBr/Bi(C2O4)OH ; p-n junction ; Mechanism
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：486
• 期：Complete
• 页码：8-15
• 全文大小：2219 K

文摘

Novel composite photocatalysts BiOBr/Bi(C₂O₄)OH were successfully fabricated via a chemical etching method. After flower-like Bi(C₂O₄)OH microstructure assembled by nanorods was etched by KBr under an appropriate acidic condition, BiOBr nano-rods could be in-situ generated in nanorods, forming a heterostructure. The heterostructures exhibited a commendable photocatalytic performance toward the degradation of rhodamine B under the visible light irradiation. The effective separation and transfer of the photogenerated electrons and holes were believed to be the main factor for the enhanced activity, which resulted from the intrinsic characteristic of p-n junction. The responsible mechanism was detailedly discussed, and the photogenerated holes and O₂⁻ radicals were confirmed to be the main active species for the photodegradation of RhB.