Fe₃O₄@Co₃S₄ Nanocatalyst: Enhanced Activation of Peroxymonosulfate for Acetaminophen Degradation.

How to accelerate the electron transfer to promote the circulating efficiency of Fe 2 + /Fe 3 + is a key problem to be solved, so that magnetic particles can activate peroxymonosulfate well to efficiently degrade acetaminophen (ACE). Herein, a Fe3O4@Co3S4 catalyst was prepared by modifying Co3S4 nanosheets on the surface of magnetic Fe3O4 particles. The Co 2 + in the modified layer Co3S4 accelerates the rate of electron transfer between Fe 2 + and Fe 3 + , thus promoting the circulating efficiency of Fe 2 + /Fe 3 + . Fe3O4@Co3S4/PMS system can degrade over 95% of ACE within 5 min. Quenching experiment and ESR tests prove that non-radical 1O2 and SO 4 • − played predominant roles in the advanced oxidation process. And after six cycles, the degradation rate could still be higher than 50%. A Fe3O4@Co3S4 catalyst was prepared by modifying Co3S4 nanosheets on the surface of magnetic Fe3O4 particles. The Co2+ in the modified Co3S4 layer accelerates the rate of electron transfer between Fe2+ and Fe3+, thus promoting the circulating efficiency of Fe2+/Fe3+. Fe3O4@Co3S4/PMS system can degrade over 95% of ACE within 5 mins. The Fe3O4@Co3S4 catalyst is of great potential application value in removal of organic pollution and environmental purification. [ABSTRACT FROM AUTHOR]