A Novel three dimensional ZC-MOF/CoFe2O4-MXene Hybrid System for Peroxymonosulfate Activation: Dominant Role of Radical and Nonradical Pathways in Organic Pollutant Elimination

Advanced oxidation processes constructed on peroxymonosulfate (PMS) activation have developed as an efficient approach for oxidizing organic pollutants from water. In this current work, a ZC-MOF/CF-MXene composite was synthesized to activate PMS for wastewater treatment. The effects of operational parameters including PMS concentration, catalyst loading, pH, common anions, and catalyst reusability were systematically examined. Under optimized conditions, the ZC-MOF/CF-MXene/PMS system attained 100% oxidation of 20 ppm methylene blue (MB) within 40 min. Comprehensive structural and surface characterizations established the formation of the composite and provided insight into its catalytic behavior. Quenching experiments demonstrated the involvement of singlet oxygen (1O2) and sulfate radicals, with 1O2 recognized as the dominant pathway for pollutant oxidation. Overall, this work introduces a robust and reusable catalyst with strong potential for start PMS activation and the efficient oxidation of organic pollutants in water remediation.