文献类型：期刊文献

英文题名：Covalent organic frameworks derived carbon supported cobalt ultra-small particles: C[dbnd]O and Co-Nx complex sites activated peroxymonosulfate synergistically for efficient degradation of levofloxacin

作者：Cao, Min[1,2]; Lei, Juying[1,2]; Zhang, Jinlong[1,2,3]; Zhou, Liang[1,2]; Liu, Yongdi[1,2]

机构：[1] National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Shanghai Engineering Research Center for Multi-media Environmental Catalysis and Resource Utilization, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China; [3] Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China

年份：2022

卷号：375

外文期刊名：Journal of Cleaner Production

收录：EI(收录号：20223912799608)

语种：英文

外文关键词：Catalyst activity - Chemical activation - Cobalt compounds - Degradation - Organic carbon - Oxygen - Water treatment

摘要：Recently, the carbon materials with metal-Nx sites or carbonyl (C[dbnd]O) have attracted extensive attention in the degradation of organic pollutants for peroxymonosulfate (PMS) activation. However, the synergistic mechanism of different sites for PMS activation is not clear. In this study, covalent organic frameworks (COF) derived carbon materials (Co–C500COF) with abundant C[dbnd]O and ultra-small Co particles were synthesized by simple hydrothermal and calcination. Theoretical and experimental results revealed that the introduction of cobalt species formed the Co-Nx site, which was beneficial to the release of C[dbnd]O which originally blocked by N group in COF. The results indicated that Co–C500COF showed excellent catalytic activity, which resulted in 94.3% of levofloxacin (LVX) removal within 2h for PMS activation, and good stability, 80% degradation efficiency after five cycles. The Co–C500COF/PMS system also maintained the incredible degradation effects in a wide pH range (3–9) and complex water environment with ion interference, which made it more potential for industrial application. The mechanism exploration revealed that C[dbnd]O and cobalt and nitrogen coordination (Co-Nx) sites were related to the production of singlet oxygen (1O2) in the main active reactive species. The degradation intermediates and toxicity of LVX were also evaluated, possible degradation pathways were proposed, and most intermediates were more environmentally friendly than LVX. Our catalyst is an ideal catalyst for the removal of organic pollutants from actual wastewater. ? 2022 Elsevier Ltd