Reduced graphene oxide/Bi4O5Br2 nanocomposite with synergetic effects on improving adsorption and photocatalytic activity for the degradation of antibiotics

Mengwen Xu; Yanying Wang; Enna Ha; Huijuan Zhang; Chunya Li

doi:10.1016/j.chemosphere.2020.129013

Reduced graphene oxide/Bi₄O₅Br₂ nanocomposite with synergetic effects on improving adsorption and photocatalytic activity for the degradation of antibiotics

Chemosphere. 2021 Feb:265:129013. doi: 10.1016/j.chemosphere.2020.129013. Epub 2020 Nov 19.

Authors

Mengwen Xu¹, Yanying Wang¹, Enna Ha², Huijuan Zhang³, Chunya Li⁴

Affiliations

¹ Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan, 430074, China.
² College of Health Science and Environmental Engineering, Shenzhen Technology University, Shenzhen, 518118, China.
³ Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan, 430074, China. Electronic address: zhjminda@mail.scuec.edu.cn.
⁴ Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan, 430074, China; Key Laboratory of Coal Conversion and New Carbon Materials of Hubei Province, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, 430081, PR China. Electronic address: lichychem@mail.scuec.edu.cn.

PMID: 33310314
DOI: 10.1016/j.chemosphere.2020.129013

Abstract

A photocatalyst based on the integration of reduced graphene oxide (rGO) with Bi₄O₅Br₂ nanosheets was facilely prepared and was confirmed by transmission electron microscope, scanning electron microscope, X-ray diffraction and Raman spectroscopy. The integration of rGO can effectively improve the adsorption and the photocatalytic properties of Bi₄O₅Br₂ nanosheets towards the target antibiotics under visible light irradiation. rGO/Bi₄O₅Br₂ nanocomposite containing 1.0 wt% of rGO exhibits the optimal adsorption and photocatalytic activity towards ciprofloxacin (CIP), norfloxacin (NOR) and tetracycline (TC). The removal efficiencies of CIP, NOR and TC are 97.6%, 80.7% and 98.7%, which are higher than that obtained with Bi₄O₅Br₂ nanosheets. The capture experiments and ESR data show that ·O₂^-, OH· and h⁺ are the main active species that participated in the photodegradation system. This work provides a simple strategy to integrate rGO with Bi_xO_yX_z (X = Cl, Br, I) nanosheets to construct effective photocatalysts for the degradation of antibiotics.

Keywords: Antibiotics; Bi-based photocatalyst; Photocatalytic degradation; Reduced graphene oxide.

MeSH terms

Adsorption
Anti-Bacterial Agents*
Catalysis
Graphite
Nanocomposites*
Oxides

Substances

Anti-Bacterial Agents
Oxides
graphene oxide
Graphite