Issue 6, 2023, Issue in Progress
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RSC Advances

Construction of a Bi2WO6/BiVO4 photocatalytic system for efficient visible light degradation of tetracycline drugs†

Yiyao Zhang,‡a   Hongchen Song,‡ab   Jintai Han,a   Yunchao Liu,a   Jing Sun,*a   Tingting Shen,*a   Xikui Wang,c   Zhen Wang,b   Weizhen Zhanga  and  Xuerui Yaoa  

* Corresponding authors

a School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China
E-mail: sunjing77@qlu.edu.cn, shentingting@qlu.edu.cn

b Shangdong Haijingtian Environmental Protection Technology Stock Company, Binzhou 256600, PR China

c College of Environmental Science and Engineering, Shandong Agriculture and Engineering University, Jinan 251100, PR China

Abstract

A Bi2WO6/BiVO4 composite photocatalytic material was synthesized by the hydrothermal method, and achieved the effective degradation of oxytetracycline (OTC) and tetracycline (TC) under visible light. The compositions, structures, chemical states and optoelectronic properties of Bi2WO6, BiVO4 and Bi2WO6/BiVO4 composites were characterized by systematic characterization. The results show that the existence of the heterojunction interface facilitates the separation of photogenerated carriers. Compared with the pure catalyst of Bi2WO6 and BiVO4, the Bi2WO6/BiVO4 composite material significantly improves the degradation efficiency of OTC and TC. The degradation rate is 6.22 and 3.02 times higher than that of Bi2WO6 and BiVO4, respectively. Through the free radical quenching experiments, it is known that photogenerated holes (h+) and superoxide anion free radicals (·O2−) are the main active substances in the degradation of OTC. By analyzing the process of photocatalytic degradation of OTC, there are mainly six intermediates during the process. Their possible degradation pathways are also inferred in this paper.

Graphical abstract: Construction of a Bi2WO6/BiVO4 photocatalytic system for efficient visible light degradation of tetracycline drugs

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Article information

DOI
https://doi.org/10.1039/D2RA07460E
Article type
Paper
Submitted
23 Nov 2022
Accepted
20 Jan 2023
First published
25 Jan 2023
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2023,13, 3612-3622

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Construction of a Bi2WO6/BiVO4 photocatalytic system for efficient visible light degradation of tetracycline drugs

Y. Zhang, H. Song, J. Han, Y. Liu, J. Sun, T. Shen, X. Wang, Z. Wang, W. Zhang and X. Yao, RSC Adv., 2023, 13, 3612 DOI: 10.1039/D2RA07460E

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