期刊
CHEMICAL ENGINEERING JOURNAL
卷 428, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.131329
关键词
Superstructures; Cobalt nanodots; Peroxymonosulfate; Degradation; Sulfonamides
资金
- National Natural Science Foundation of China [22006081, 22076086, 21777089]
- Key Research and Development Program of Shandong Province [2019GSF111016, 2019JZZY010121]
- Jinan City University and Institute Innovation Team Project [2019GXRC032, 2020GXRC008]
- Shandong Province Taishan Scholar Program [ts20190948]
A porous 3D superstructure of nitrogen-doped carbon decorated with ultrafine cobalt nanodots was prepared and showed excellent catalytic performance towards the degradation of sulfonamides. The catalytic mechanism of Co@NCSS/PMS for sulfamethoxazole degradation was proposed based on experimental and computational analysis. This material has the potential to be an ideal candidate for removing antibiotics from wastewater.
Superstructures have attracted attention because of their potential applications in chemistry and materials science. In this work, we report the preparation of a porous 3D superstructure of nitrogen-doped carbon decorated with ultrafine cobalt nanodots (Co@NCSS) derived from the self-assembly of polyimide nanoparticles. Utilizing modified ultra-small cobalt nanodots as main catalytically active sites, and the excellent quality and electron transport efficiency generated by this 3D porous superstructure, Co@NCSS exhibited excellent catalytic performance as a peroxymonosulfate (PMS) activator towards the degradation of several sulfonamides. Based on radical scavenging tests and electron paramagnetic resonance (EPR), singlet oxygen (1O2) was the dominant oxidative species. Furthermore, through the identification of degradation intermediates by HPLC-MS and DFT calculation, the pathway of sulfamethoxazole (SMX) degradation by Co@NCSS/PMS was analyzed. The possible catalytic mechanism of Co@NCSS/PMS for SMX degradation is also proposed in this paper. Co@NCSS has the potential to be an ideal material for removing antibiotics from wastewater.
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