Enhanced stability and conductivity of montmorillonite and sucrose loaded Fe-MOFs for degradation of chlortetracycline hydrochloride via electrochemically activated persulfate

Ferreous metal-organic frameworks (Fe-MOFs) have provided excellent platforms for the removal of refractory contaminants from water, whereas poor conductivity and intrinsically fragile limit applications in electro-chemistry and heterogeneous catalyst, respectively. Hence, we synthesized a novel Fe-based MOFs(Mt@Fe-MOFs@C) obtained through introducing sucrose to improve conductivity and montmorillonite (Mt) to enhance cycling stability, and combined with persulfate (PS) and electrochemical (EC) method to remove chlortetracy-cline hydrochloride(CTC) from water environment. The electrochemical impedance spectroscopy (EIS) demon-strated Mt.@Fe-MOFs@C was more conductive than pure Fe-MOFs. Mt.@Fe-MOFs@C showed high electrocatalytic activity for degradation of CTC in EC/Mt.@Fe-MOFs@C/PS system. The mechanism study indicated that SO4 center dot- and HO center dot played dominant role in the elimination of CTC. Mt.@Fe-MOFs@C also exhibited excellent reusability with 83% removal efficiency after 5 cycle degradation. This work demonstrated that Mt. @Fe-MOFs@C would have potential for electrochemical wastewater remediation.