Highly Active Co is Injected into the PrSmMnO3 Parent Structure to Promote the 1O2 Pathway to Efficiently Degrade Residual Chloroquine Phosphate in Wastewater
After the outbreak of COVID-19, the severe threat to the entire biological environment caused by the extensive use of chloroquine phosphate (CQ) continues. In this paper, a new sol–gel method was used to inject highly active Co into the PrSmMnO 3 matrix structure to prepare a novel perovskite composite catalyst PrSmCo 0.8 Mn 0.2 O 3 with stable properties, and was used to efficiently activate monopersulfate (PMS) to produce high concentration of 1 O 2 and degrade CQ. The CQ degradation rate of 40 mg L −1 within 80 min was 97.3%, and excellent performance was maintained after 5 cycles. The fixed variable method found that the PrSmCo 0.8 Mn 0.2 O 3 /PMS system still has high efficiency and adaptability in complex water bodies. Through quenching experiments and electron paramagnetic resonance spectroscopy (EPR), we explored the PrSmCo 0.8 Mn 0.2 O 3 /PMS system. PMS is efficiently adsorbed on highly active Co, forming a high-entropy mixed interface, which promotes the decomposition of PMS and generates a large amount of ⋅O 2 − radicals. At the same time, Co–Mn synergistically and efficiently utilizes excess electrons and ⋅O 2 − radicals in the solution to produce high concentrations of 1 O 2 through disproportionation reactions, promoting the degradation of CQ. It provides new insights into the application of perovskite oxides in medical wastewater treatment. Graphical
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