Comparative investigation of BiOCl0.5X0.5 (X = F, Br, and I) heterojunctions for solar-light driven photodegradation of tetracycline hydrochloride

BiOCl0.5X0.5 (X = F, Br, and I) heterojunctions were prepared via the solvothermal approach to achieve the solar-light induced photodegradation of tetracycline hydrochloride (TCH). The photocatalytic activity of BiOCl coupling with BiOI is greatly affected by the molar ratio of Cl/I. The best photoc...

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Published inColloids and surfaces. A, Physicochemical and engineering aspects Vol. 656; p. 130477
Main Authors Liang, Zewei, Wen, Jing, Zhou, Yuanliang, Liu, Tingting, Dong, Jinmei, Zheng, Weixin, Chang, Chenggong, Xiao, Xueying, Liu, Qiyuan, Zheng, Xiaogang
Format Journal Article
LanguageEnglish
Published Elsevier B.V 05.01.2023
Subjects
BiOCl0.5I0.5
Solar light
Tetracycline hydrochloride
Z-scheme heterojunction
Tetracycline hydrochloride
Solar light
Z-scheme heterojunction
BiOCl0.5I0.5
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Summary:BiOCl0.5X0.5 (X = F, Br, and I) heterojunctions were prepared via the solvothermal approach to achieve the solar-light induced photodegradation of tetracycline hydrochloride (TCH). The photocatalytic activity of BiOCl coupling with BiOI is greatly affected by the molar ratio of Cl/I. The best photocatalytic efficiency of 97.9 % within 120 min is obtained by flower-like BiOCl0.5I0.5 microspheres with a Cl/I molar ratio of 1:1, and the removal efficiency of TCH over BiOCl0.5I0.5 declines to 93.2 % after five cycles. Compared with BiOCl0.5Br0.5 and BiOCl0.5F0.5, BiOCl0.5I0.5 presents the better photocatalytic activity. Z-scheme junction between BiOCl and BiOI is favorable for the efficient separation and migration of photo-generated charge carriers, and the narrow band-gap structure of BiOCl0.5I0.5 microspheres favors the visible-light harvesting.·O2- plays a vital role in BiOCl0.5I0.5-assisted photocatalytic reaction. However, the change in valance states induced by photo-corrosion is responsible for the solar-light deactivation of BiOCl0.5I0.5. [Display omitted] •BiOCl0.5X0.5 (X = F, Br, and I) heterojunctions have excellent photodegradation activity.•Z-scheme BiOCl0.5I0.5 junction favors the rapid transfer and separation of charge carriers.•BiOCl0.5I0.5 (2.09 eV) has narrow band-gap structure for visible-light harvesting.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2022.130477