化学
卤化
电子转移
电催化剂
环境修复
脱氯作用
组合化学
光化学
电极
物理化学
污染
生物降解
有机化学
生态学
电化学
生物
作者
Zimo Lou,Xiaofei Wen,Ludi Song,Yan Chen,Hongxu Chen,Tao Lu,Jiaguo Yu,Xinhua Xu,Jiansheng Li
标识
DOI:10.1016/j.apcatb.2023.122923
摘要
To achieve the precision removal of trace florfenicol (FLO) with presence of various high-concentration interferents in water matrices, an oxygen vacancy engineered molecular imprinted TiO2 (MI-TiO2−x) cathode material was customized rationally. Benefiting from the increased recognition and the accelerated interfacial charge transfer contributed by molecular imprinted sites and oxygen vacancy, respectively, MI-TiO2−x deeply dehalogenates 10 mg L−1 FLO via direct electron transfer with the degradation rate constant of 0.021 min−1. Such electrode material outperforms most of the recent electrocatalysts, and show resistance to co-existing interferents (e.g. reduced sulfur species). In an electro-reductive and biological coupling system, MI-TiO2−x removes the antibacterial activity of 2 mg L−1 FLO in swine wastewater and thus eliminates the abundance of FLO resistance genes. This study provides insights into not only rational design of the noble-metal-free electrocatalyst for preferential remediation of low-concentration organic halides, but also the significance of mitigating ecological risk by dehalogenation treatment.
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