Boosted elimination of florfenicol by BiOClxBr1-x solid solutions via photocatalytic ozonation under visible light

Lu Tan; Zhenxi Yuan; Weirui Chen; Ziyi Lin; Yiming Tang; Laisheng Li; Jing Wang

doi:10.1016/j.jcis.2023.12.086

Boosted elimination of florfenicol by BiOCl_xBr_1-x solid solutions via photocatalytic ozonation under visible light

J Colloid Interface Sci. 2024 Mar 15:658:487-496. doi: 10.1016/j.jcis.2023.12.086. Epub 2023 Dec 15.

Authors

Lu Tan¹, Zhenxi Yuan¹, Weirui Chen², Ziyi Lin¹, Yiming Tang³, Laisheng Li³, Jing Wang⁴

Affiliations

¹ School of Environment, South China Normal University, Guangzhou 510006, China.
² School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
³ School of Environment, South China Normal University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou 510006, China.
⁴ School of Environment, South China Normal University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou 510006, China. Electronic address: jing.wang@m.scnu.edu.cn.

PMID: 38128192
DOI: 10.1016/j.jcis.2023.12.086

Abstract

In this work, a series of BiOCl_xBr_1-x (BCB) solid solutions are facilely designed for visible-light-driven photocatalytic ozonation (PCO) degradation of florfenicol (FF) in water environments, which could add to the library of efficient, cost-effective and robust nanocatalysts for water purification. BCB solid solutions in the structure of 2D nanosheets are achieved involving the etching of BiOBr "micro-flowers" with HCl at different concentrations, allowing a removal ratio of FF up to 97.3 % within 1 h, superior to bare BiOBr and bare BiOCl. A strengthened synergistic effect between photocatalysis and ozonation is substantiated, where the separation of photo-induced charge transfer is accelerated, the band gap is tuned and the utilization efficiency of ozone is enhanced. This facilitates the production of reactive oxygen species identified as •OH, •O₂^-, and ¹O₂ that will attack the FF molecule for degradation based on three pathways.

Keywords: AOPs; Bismuth semiconductor; Florfenicol; Photocatalysis; Solid solution.