Metal-organic framework-derived CuCo/carbon as an efficient magnetic heterogeneous catalyst for persulfate activation and ciprofloxacin degradation

Ming-Ming Chen; Huai-Yuan Niu; Cheng-Gang Niu; Hai Guo; Song Liang; Ya-Ya Yang

doi:10.1016/j.jhazmat.2021.127196

Metal-organic framework-derived CuCo/carbon as an efficient magnetic heterogeneous catalyst for persulfate activation and ciprofloxacin degradation

J Hazard Mater. 2022 Feb 15;424(Pt A):127196. doi: 10.1016/j.jhazmat.2021.127196. Epub 2021 Sep 17.

Authors

Ming-Ming Chen¹, Huai-Yuan Niu², Cheng-Gang Niu³, Hai Guo¹, Song Liang¹, Ya-Ya Yang¹

Affiliations

¹ College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China.
² State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
³ College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China. Electronic address: cgniu@hnu.edu.cn.

PMID: 34601415
DOI: 10.1016/j.jhazmat.2021.127196

Abstract

Herein, the authors synthesis an efficient and easily recycled CuCo/C catalyst through one-step carbonization of Cu@Co-MOF-71 (Abbreviated as Cu@Co-MOF in this work) precursor. The prepared CuCo/C has a high degradation efficiency of 90% for ciprofloxacin (CIP) by activating PMS in a wide value of pH 3-9 within 30 min. After pyrolysis, the carbon matrix as a dispersant can promote the highly uniform distribution of active metals. Additionally, the CIP removal efficiency was 85% after four cycles and the catalyst was easily separated from the solution by using magnets, showing the good stability and reusability. To further study the superiority of CuCo/C activated PMS in degrading CIP, the factors such as pH, the dosage of PMS and catalyst, temperature, inorganic ions and pollutant (CIP) concentration were investigated. Furthermore, the Liquid chromatography-mass spectrometry (LC-MS) was utilized to analyze the intermediate products and possible degradation pathways of CIP. Typically, the quenching experiments and electron paramagnetic resonance (EPR) technology were investigated to confirm the main reaction species including SO₄^▪-, OH▪ and O₂^▪- radicals as well as nonradical (¹O₂). This work put forward a simple method for synthesis of metal-organic framework (MOF) derived catalysts and its application in treatment of organic pollutants.

Keywords: Ciprofloxacin; CuCo/C; Metal-organic frameworks; Peroxymonosulfate.

Publication types

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

MeSH terms

Carbon
Ciprofloxacin*
Magnetic Phenomena
Metal-Organic Frameworks*
Peroxides

Substances

Metal-Organic Frameworks
Peroxides
Ciprofloxacin
Carbon