Abstract
Metal-organic frameworks (MOFs) derived catalysts with improved recovery and reusability are challenging in peroxymonosulfate (PMS) activation. Herein, a ZIF-67/graphene aerogel (Z-GA) heterostructure was rationally constructed via in situ growth method based on the synergistic effect: Co x+ stabilized the PMS activation capacity and GA provided high opportunity for radicals and contaminants contact. The as-prepared Z-GA/PMS system exhibited outstanding performance for the tetracycline hydrochloride (TC) removal, good pH-stability ranging from 5.0 to 9.0 and excellent anti-interference capability. The quenching experiment and EPR tests co-proved the significant roles of reactive SO4 •- and 1O2 species in the TC degradation process. In addition, several contaminants were selected to certify the superiority of the Z-GA3/PMS and multiple water sources were employed to demonstrate the universality in the complicated water environment. This pioneering work demonstrated the feasibility of Z-GA/PMS system for effluent disposal.
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