文献类型：期刊文献

英文题名：Photocatalytic activation of C-Br bond on facet-dependent BiOCl with oxygen vacancies

作者：Xu, Tingting[1];Yang, Meiying[1];Chen, Chuncheng[2];Duan, Ran[2];Shen, Qi[1];Sun, Chunyan[1]

机构：[1]Shaoxing Univ, Dept Chem, Hangzhou 312000, Zhejiang, Peoples R China;[2]Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Photochem, Beijing 100190, Peoples R China

年份：2021

卷号：548

外文期刊名：APPLIED SURFACE SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000624483100001)、、EI(收录号：20210709924224)、Scopus(收录号：2-s2.0-85100798392)、WOS

基金：This work was supported by grants from the National Natural Science Foundation of China (No. 21477080, No. 22006100) , the Natural Science Foundation of Zhejiang Province (No. LQ19B070003) .

语种：英文

外文关键词：Oxygen vacancy; C-Br bond; BiOCl; Polybrominated diphenyl ethers; Facet-dependent

外文摘要：As typical persistent organic pollutants, polybrominated diphenyl ethers (PBDEs) have aroused high environmental concern due to their toxicity and recalcitrant degradation. Herein, the photocatalytic decabromodiphenyl ether (BDE209) removal performance was evaluated firstly on facet-dependent BiOCl with oxygen vacancies under irradiation (>360 nm). The results revealed that BDE209 was rapidly debrominated on {001} BiOCl with a reaction rate 4.4 times greater than that on {0 1 0} BiOCl under oxygen-free environment. Such a degradation order is completely opposite to that of Rhodamine B (RhB) degradation. This enhanced reduction is mainly attributed to the abundant oxygen vacancies on {001} facet of BiOCl, which act as adsorption sites for BDE209 to achieve C-Br bond activation efficiently. Meanwhile, debrominated products via meta -position have the highest proportion than that via orthoand para-position in the first step. Therefore, a position-selective multi electrons reduction mechanism is hypothesized. This study provides a new sight on C-X bond activation of halogenated aromatics by inducing oxygen vacancies on specific facets.