An efficient porous carbon catalyst derived by Cobalt-MOF precursor for degrading antibiotics in aqueous system

Abstract

The environment of human life especially in aqueous system becomes an attractive topic of the wastewater treatment investigation. With the development of chemical research, more and more wastewater treatment methods had become main trend in controlling water pollution. In this work, a new porous carbon material (Co/CoO-NC/Br) derived by one-step pyrolysis of cobalt metal-organic-framework (CUST-594) was synthesized. The obtained catalyst had excellent catalytic property and recycling features with peroxymonosulfate (PMS) activation process. The results indicated that 6 mg catalyst with 1.0 mL PMS (50 mg/L) had the degradation efficiency of 93.6 % of tetracycline (TC) in 20 min. The other experiment parameters like PMS and catalyst dosage, pH, temperature and interfering anions were also studied to verify the catalytic activity. In addition, this catalyst can deal with most part of aqueous system (pH = 5–9) and perform great cycling ability (after 5 cycles). The possible reaction mechanism was discussed and the main reaction substances were determined by scavenger experiments. This work provides a new way of synthesizing low cost, less side-effect catalyst to deal with most part of wastewater conditions.