Insights into the visible-light-driving MIL-101 (Fe) / g –C3N4 materials-activated persulfate system for efficient hydrochloride water purification

Abstract

Antibiotic wastewater contamination poses a major threat to the global environment and human health. In this study, a stable Fe-based metal-organic framework (MOF) doped on g-C3N4 backbone MIL-101(Fe)/g-C3N4 was synthesised using a peroxymonosulfate (PMS)/visible light system to prepare a Fenton-like catalyst. The system showed high activity and stability during PMS heterophase activation for tetracycline hydrochloride (TET) degradation. While having the best PMS activation binding energy. Additionally, the analysis suggests that the surface oxygen functional groups, defective material structure and actives sites for PMS activation provided via MIL-101(Fe)/g-C3N4 oxide adsorption have the best activity and stability for the degradation of TET. Moreover, superoxide radical O•2-, sulfate radical SO•4-, singlet oxygen1O2 and hydroxyl radical •OH can be used for the efficient degradation of antibiotics and organic compounds in water, with wastewater cycling experiments revealing the catalyst is high chemical stability. Therefore this study proposes a feasible degradation pathway for TET and proviides. new ideas for antibiotic degradation and decontamination using sunlight-powered activators.