Fabrication of FeOCl nanoparticles modified microchannel carbon cathode for flow-through electro-Fenton degradation of refractory organic pollutants
Fabrication of FeOCl nanoparticles modified microchannel carbon cathode for flow-through electro-Fenton degradation of refractory organic pollutants
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FeOCl纳米颗粒修饰微通道碳阴极的制备用于流式电芬顿降解难降解有机污染物
DOI：
10.1016/j.seppur.2022.120661
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发表时间：
2022-02
影响因子：
8.6
通讯作者：
Xie Quan
中科院分区：
文献类型：
--
作者：
Lei Wang;Shuai Wu;Hui Chen;Wei Mao;Wenda Kang;Shuo Chen;Hongtao Yu;Xie Quan
本研究描述了一种安装FeOCl纳米颗粒负载微通道碳（MC）阴极的电fenton过滤器，用于快速去除难降解的有机污染物。在120 s的停留时间内，通过氧还原反应生成了1.4 mmol/L以上的h2o2，活性位点为平均直径为28 μm的微通道中的介孔碳。FeOCl纳米粒子是有效激活h2o2生成dotOH的活性位点，电场加速了Fe(III)/Fe（II）的循环。电fenton法以初始浓度为20 mg/L的苯酚溶液为目标，停留时间为450 s，苯酚去除率为98%，有机碳去除率为51%。对阿特拉津或磺胺甲恶唑的降解也有类似的效果。良好的性能归因于o2和有机物的微米级扩散距离以及h2o2在FeOCl纳米颗粒上向dotOH的有效转化。微通道中羟基自由基与有机物接触和氧化的比例较高。研究表明，负载微通道碳阴极的电fenton过滤器是一种高效生成和利用dotOH的新途径。
This study described an electro-Fenton filter installing a FeOCl nanoparticles loaded microchannel carbon (MC) cathode for rapid removal of refractory organic pollutants. In 120 s of residence time, more than 1.4 mmol/L of H2O2was produced via oxygen reduction reaction and the active sites were mesoporous carbon in microchannels with the average diameter of 28 μm. FeOCl nanoparticles was the active sites for efficiently activating H2O2to generateradical dotOH and electric field accelerates the cycle of Fe(III)/Fe(II). For the electro-Fenton process taking the phenol solution with initial concentration of 20 mg/L as a target, 98% of phenol and 51% of total organic carbon were removed at a residence time of 450 s. Similar performances were observed for the degradation of atrazine or sulfamethoxazole. The good performance was ascribed to the micrometer-level diffusion distance for O2and organics and the effective conversion of H2O2toradical dotOH over FeOCl nanoparticles. And it is high-proportioned forradical dotOH in microchannels to contact with and oxidize organics. The study demonstrated that the electro-Fenton filter on basis of catalysts loaded microchannel carbon cathodes was a new approach to generate and utilizeradical dotOH efficiently.
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