Efficacy and mechanism of activation peroxymonosulfate for tetracycline degradation by AC-MIL-101(Fe)-derived magnetic CuO/Fe2O3/CuFe2O4

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2024-11, Vol.701, p.134867, Article 134867
• Main Authors: Zheng, Haoyuan, Mo, Qianyuan, Zhang, Xi, Huang, Jie, Sheng, Guishang
• Format: Article
• Language: English
• Subjects: AC-MIL-101(Fe); CuO/Fe2O3/CuFe2O4; Degradation mechanisms
• ISSN: 0927-7757
• DOI: 10.1016/j.colsurfa.2024.134867

In this work, magnetic CuO/Fe2O3/CuFe2O4 (CFC-0.50) composites were prepared by using a complex of the metal–organic skeleton AC-MIL-101(Fe) and Cu as a precursor. The compositional structure of the catalysts was observed via XRD, FTIR, SEM, and TEM, and the physicochemical properties of the catalyst materials were analyzed via characterization methods such as BET and VSM. Degradation experiments using TC as the target antibiotic were performed to screen the optimal catalyst, CFC-0.50, by modulating different doping ratios of Cu/AC-MIL-101(Fe) to study the effects of changes in key parameters of the catalyst environment on the degradation efficiency of TC and to investigate the stability and applicability of CFC-0.50. The reaction mechanism of the CFC-0.50/PMS/TC system was proposed by using XPS to study the chemical shape of the catalyst before and after the reaction and supplemented by quenching experiments, EPR, and EIS and LSV. The intermediate products of the reaction system were analyzed via LCMS, and possible degradation pathways were proposed. [Display omitted] •CFC-0.50/PMS system possesses ultra-fast reaction rate.•CFC-0.50 works effectively at pH values of 3–11.•The CFC-0.50/PMS system has a unique mechanism of reactive oxygen species action.•Excellent magnetic recovery and stability of catalysts.•Both radical and nonradical pathways acting on degradation systems.