Fe,Co/NPs@GO双金属三维粒子电极电催化氧化卡马西平  

Catalytic oxidation of carbamazepine by Fe,Co/NPs@GO bimetallic three-dimensional particle electrode

作　　者：周紫璇 卓琼芳 Ghulam Yasin 谢水波 ZHOU Zi-xuan;ZHUO Qiong-fang;Ghulam Yasin;XIE Shui-bo(School of Civil Engineering,University of South China,Hengyang 421001,China;Dongguan Key Laboratory of New Pollutants,School of Ecological Environment and Architectural Engineering,Dongguan University of Technology,Dongguan 523808,China)

机构地区：[1]南华大学土木工程学院,湖南衡阳421001 [2]东莞理工学院生态环境与建筑工程学院,东莞市新污染物重点实验室,广东东莞523808

出　　处：《中国环境科学》2024年第8期4632-4640,共9页China Environmental Science

基　　金：广东省基础与应用基础研究基金项目(2022A1515140086);东莞市科技特派员项目(20221800500352)。

摘　　要：采用冷冻/碳化法制备了铁钴双金属粒子电极(Fe,Co/NPs@GO),并通过改善铁钴的前驱体比例优化了Fe,Co/NPs@GO双金属三维粒子电极体系对CBZ的降解性能,探讨电流密度和PMS投加量对CBZ降解的影响结果表明:0.15g/L的Fe,Co/NPs@GO(Fe:Co=1:1),3mmol/L PMS,在20mA/cm^(2)的电流密度下,CBZ(1mg/L)在30min内的去除率达99.5%.与单纯的催化剂活化PMS体系相比,加入电催化条件后,CBZ的去除率提升了约37%.通过自由基淬灭实验及电子顺磁共振(EPR)证实,羟基自由基和单线态氧是降解CBZ的主导活性物种,并推测出CBZ在电催化耦合三维粒子电极活化过一硫酸盐(PMS)体系的降解机理.同时,粒子电极的循环利用实验表明,Fe,Co/NPs@GO粒子电极具有较好的催化稳定性和重复利用性.The Fe-Co bimetallic particle electrodes(Fe,Co/NPs@GO)were synthesized by the freezing/carbonization method.And the degradation performance of the Fe,Co/NPs@GO bimetallic three-dimensional particle electrode system for CBZ was optimized by adjusting the precursor ratio of Fe and Co.The effects of current density and PMS dosage on CBZ degradation were examined.It was found that a removal rate of 99.5%for CBZ(1mg/L)could be achieved within 30min under the conditions of 0.15g/L Fe,Co/NPs@GO(Fe:Co=1:1),3mmol/L PMS,and a current density of 20mA/cm^(2).The addition of electrocatalytic conditions to the pure catalyst activation of PMS system resulted in an increase in the removal rate of CBZ by approximately 37%.Radical quenching experiments and electron paramagnetic resonance(EPR)analysis confirmed that•OH and 1O_(2) are the primary active species responsible for CBZ degradation,and the degradation mechanism of CBZ in the electrocatalytic coupling three-dimensional particle electrode activation of peroxymonosulfate(PMS)system was deduced.The recycling experiment of the particle electrode demonstrated that the Fe,Co/NPs@GO particle electrode possesses good catalytic stability and reusability.

关 键 词：三维粒子电极 电化学氧化 卡马西平 过一硫酸盐 铁钴双金属粒子电极 

分 类 号：X703[环境科学与工程—环境工程]