光催化
循环伏安法
化学
核化学
光电流
光化学
材料科学
电极
有机化学
催化作用
电化学
物理化学
光电子学
作者
Weikang Lai,Zhuoyao Chen,Shengjun Ye,Yanbin Xu,Guo-Jun Xie,Chaozhi Kuang,Yuxin Li,Li Zheng,Longmeng Wei
标识
DOI:10.1016/j.jhazmat.2020.124621
摘要
In this research, bismuth vanadate-doped graphite felt (GF-BiVO4) was successfully prepared by sol–gel method, in which BiVO4 owned superior electro-Fenton (EF) and solar-photo-electro-Fenton (SPEF) performance. Combined with the analysis by X-ray diffractometer (XRD), field emission transmission electron microscopy (FE-TEM), nitrogen adsorption–desorption isotherms and cyclic voltammetry (CV), the changes of electrodes were reflected in structure and physicochemical properties. The doping of monoclinic BiVO4 endued GF with a higher surface area and more electro-active sites and better electrode activity in comparison to Raw-GF. Then, the GFs were used as cathodes to detect •OH concentration with coumarin (COU) as probe molecule and to evaluate photoelectric performance with ciprofloxacin (CIP) in photocatalysis, EF and SPEF processes. The results demonstrated that the concentration of •OH followed an order of SPEF > EF > photocatalysis, which was consistent with the removal rate of CIP (99.8%, 99.4% and 21.2%, respectively) on GF-BiVO4 at 5 min. Further, five degradation pathways of CIP in SPEF system were proposed including the attack on piperazine ring, oxidation on cyclopropyl group, decarboxylation and hydroxyl radical addition, oxidation on benzene group and defluorination. The study provides insights into the enhancement of EF and SPEF performance and the degradation pathway of CIP in SPEF.
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