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所属单位：山东大学

论文名称：Well-dispersed cobalt nanoparticles encapsulated on ZIF-8-derived N-doped porous carbon as an excellent peroxymonosulfate activator for sulfamethoxazole degradation

发表刊物：Chemical Engineering Journal

刊物所在地：Elsevier

关键字：MOFs-derived porous carbon； encapsulated Co NPs； PMS activation； synergistic interaction； non-radical pathway

摘要：The practical application of carbon materials supported cobalt (Co)-based heterogeneous materials as excellent peroxymonosulfate (PMS) activators has attracted wide attention in recent years because of their low particle self-agglomeration and low Co leaching. Herein, we developed a new synthetic strategy for designing Co nanoparticles (Co NPs)-encapsulated zeolitic imidazolate frameworks-8-derived porous carbon (NC) (denoted as Co-N@NC-x) by calcinating NC with a polydopamine-chelating Co coating. It was demonstrated that NC could effectively prevent Co agglomeration because it provided rich load sites for Co. Raman and X-ray photoelectron spectroscopy results indicated that the addition of Co could increase the surface defects of NC. Co-N@NC-x (0.1 g/L) efficiently catalyzed PMS to degrade 96.91% of sulfamethoxazole (SMX, 20 mg/L) within 90 min with an initial pH of 3.65–9.05 based on the synergistic effect between Co NPs and NC. It was demonstrated that Co NPs were the main active sites, and the defects and carbonyl (C=O) group active sites also contributed to SMX degradation by catalyzing PMS. Graphitic N was an adsorption site for SMX. A singlet oxygen (1O2)-dominated non-radical mechanism has been proposed. Additionally, Co-N@NC-90 exhibited excellent stability resulting from NC encapsulation. This work provides a novel approach for the application of metal organic framework-derived carbon-supported metal catalysts in wastewater purification.

第一作者：Hao Liu

通讯作者：Shan Zhao

全部作者：Zuoli He,Jiahuan Li

论文类型：期刊论文

卷号：541

期号：4

页面范围：138597

DOI码：10.1016/j.cej.2022.138597

字数：6000

是否译文：否

发表时间：2023-01

收录刊物：SCI

发布期刊链接：https://doi.org/10.1016/j.cej.2022.138597

发布时间：2022-08-12