MOFs-derived CuO-Fe3O4@C with abundant oxygen vacancies and strong Cu-Fe interaction for deep mineralization of bisphenol A

Wenjun Zhu; Xiaohua Zuo; Xiaofei Zhang; Xiangyi Deng; Deng Ding; Chunlei Wang; JunTao Yan; Xiaobo Wang; Guanghui Wang

doi:10.1016/j.envres.2023.115847

MOFs-derived CuO-Fe₃O₄@C with abundant oxygen vacancies and strong Cu-Fe interaction for deep mineralization of bisphenol A

Environ Res. 2023 Jul 1:228:115847. doi: 10.1016/j.envres.2023.115847. Epub 2023 Apr 6.

Authors

Wenjun Zhu¹, Xiaohua Zuo², Xiaofei Zhang², Xiangyi Deng², Deng Ding³, Chunlei Wang³, JunTao Yan³, Xiaobo Wang⁴, Guanghui Wang⁵

Affiliations

¹ College of Chemistry and Chemical Engineering, Hubei Key Laboratory of Mine Environmental Pollution Control & Remediation, Hubei Polytechnic University, Huangshi, 435003, China; Hubei Key Laboratory of Coal Conversion and New Carbon Material, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, 430081, China.
² College of Chemistry and Chemical Engineering, Hubei Key Laboratory of Mine Environmental Pollution Control & Remediation, Hubei Polytechnic University, Huangshi, 435003, China.
³ College of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan, 430023, China.
⁴ College of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan, 430023, China; College of Chemistry and Chemical Engineering, Hubei Key Laboratory of Mine Environmental Pollution Control & Remediation, Hubei Polytechnic University, Huangshi, 435003, China. Electronic address: wangxiaobo@hbpu.edu.cn.
⁵ Hubei Key Laboratory of Coal Conversion and New Carbon Material, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, 430081, China. Electronic address: wangguanghui@wust.edu.cn.

PMID: 37030409
DOI: 10.1016/j.envres.2023.115847

Abstract

A novel CuO-Fe₃O₄ encapsulated in the carbon framework with abundant oxygen vacancies (CuO-Fe₃O₄@C) was successfully prepared by thermal conversion of Cu(OAc)₂/Fe-metal organic framework. The as-prepared catalyst exhibited excellent peroxymonosulfate (PMS) activation performance, good recyclability and fast magnetic separation. Under optimal conditions, the added BPA (60 mg/L) could be completely removed by CuO-Fe₃O₄@C/PMS system within 15 min with the degradation rate constant (k) of 0.32 min^-1, being 10.3 and 246.2 times that in CuO/PMS (0.031min^-1) and Fe₃O₄/PMS (0.0013 min^-1) system. A deep mineralization rate of BPA (＞80%) was achieved within 60 min. The results demonstrated the synergistic effect of bimetallic clusters, oxygen vacancies and carbon framework was a key benefit for the exposure of more active sites, the electron donor capacity and the mass transfer of substrates, thereby promoting the decomposition of BPA. Capture experiments and EPR indicated that ¹O₂ was the predominant reactive oxygen species (ROSs). The degradation routes of BPA and the activation mechanism of PMS were proposed. This study offers an opportunity to develop promising MOFs-derived hybrid catalysts with tailored structures and properties for the practical application of SR-AOPs.

Keywords: Bimetallic oxides; Degradation; MOFs; Peroxymonosulfate.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Carbon* / chemistry
Oxygen*

Substances

bisphenol A
cupric oxide
Oxygen
peroxymonosulfate
Carbon