Sn-Sb共掺杂Ti/SnO2电极电催化降解苯酚的性能及机理OA

To optimize the structure of Ti/SnO2-based anodes in electrochemical advanced oxidation processes and enhance their electrocatalytic activity and stability,a Sn-Sb co-doped Ti/SnO2 electrode was constructed,and phenol was used as a model pollutant to evaluate its degradation performance and reaction mechanism.In this study,electrodes with different Sn and Sb doping levels were prepared by sol-gel method.Their structure and interfacial behavior were characterized by XRD,SEM,and electrochemical tests.Phenol was used as a model pollutant in constant current electrolysis experiments to evaluate degradation kinetics,mineralization efficiency,and energy consumption.The results indicated that the Sn-Sb co-doped electrode possessed a dense surface,high oxygen evolution potential,and a large electrochemical active area.Its removal rates and apparent rate constants for phenol and TOC were higher than those of singly doped electrodes,and its energy consumption per unit TOC mineralized was the lowest.The results of free radical quenching experiments and intermediate product analysis revealed that·OH was the dominant active species.Sn-Sb co-doping can significantly enhance the electrocatalytic activity and service life of Ti/SnO2-based electrodes,providing a reference for the optimization design of anode materials for electrochemical advanced oxidation processes.