Photocatalytic fuel cell(PFC)has the great potential for simultaneous refractory organic pollutants degradation and energy recovery.The cathode may affect the electricity production and anode photocatalytic performance of this system.In this study,TiO2/g-C3N4/CQDs film electrode(TCNC)was used as the photoanode of the PFC,and the effect of different functional cathodes on the removal of carbamazepine(CBZ)was investigated.Under the power intensity of 80 mW.cm-2(LED white light),300 min treatment by PFC with carbon-loaded platinum air diffusing cathode(Pt/C)resulted in higher CBZ removal efficiency of 75.2％than that with graphite cathode(PG),Fenton-like air diffusing cathode(GF)and ordinary platinum cathode(Pt).At the same time,TCNC-Pt/C system had higher energy recovery with the Pmax of 1.5 μW·cm-2,which was 3-5 times of the PFC systems with other three cathodes.Furthermore,the effects of initial CBZ concentration,electrolyte type,power intensity,humic acid and current intensity on the removal of CBZ by the TCNC-Pt/C system were investigated.Based on the EPR results,quenching experiments and intermediate product analysis,it was suggested that O2-and OH were the dominated reactive species leading to CBZ degradation in the TCNC-Pt/C system,and the probable degradation pathway of CBZ was identified.This study may provide a data reference for the low-consumption and high-effective removal of CBZ by the PFC system.
维普
万方数据
