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Co/N co-doped porous carbon as a catalyst for the degradation of RhB by efficient activation of peroxymonosulfate

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Abstract

We report on the preparation of Co/N-NPCx/y with porous structure and excellent activation properties. The synthesis involves the preparation of Zn/Co-ZIFx and the carbonization of Zn/Co-ZIFx at a high temperature in an inert atmosphere. The volatilization of zinc during carbonization results in a porous structure, which is beneficial to the migration of pollutants. The sizes, specific surface areas, and pore size distribution of Co/N-NPCx/y can be achieved by tuning Zn/Co ratio. The calcination temperatures mainly affect the crystalline phase, crystallinity, and magnetic properties of the as-prepared materials. The effects of the as-prepared materials properties and activation conditions on the Rhodamine B (RhB) degradation by PMS activation were investigated. Overall, it exhibited superior catalytic activity in PMS activation, as evidenced by almost complete removal of RhB (0.020 mM, 100 mL) by using 5 mg/L Co/N-NPC0.5/900 and 1.250 mM PMS within 30 min. Furthermore, it confirmed the participation of SO4•−, •OH, and 1O2 in the catalytic reaction, and both SO4•− and 1O2 were the main reactive oxygen species that play a major role.

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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable.

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Funding

The present work was financially supported by the National Key Research and Development Program (Grant No. 2019YFC1804002) and National Natural Science Foundation (Grant No. 51608269).

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Hongxia Yu: methodology, conceptualization, supervision, writing—reviewing and editing, project administration, funding acquisition; Dan Ding: writing—original draft, conceptualization, methodology, investigation; Shuailing Zhao: investigation, methodology; Muhammad Faheem: writing—reviewing and editing, conceptualization; Weijie Mao: investigation; Li Yang: investigation; Liwei Chen: project administration, funding acquisition; Tianming Cai: writing—reviewing and editing, conceptualization.

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Correspondence to Tianming Cai.

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Yu, H., Ding, D., Zhao, S. et al. Co/N co-doped porous carbon as a catalyst for the degradation of RhB by efficient activation of peroxymonosulfate. Environ Sci Pollut Res 30, 10969–10981 (2023). https://doi.org/10.1007/s11356-022-22548-1

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  • DOI: https://doi.org/10.1007/s11356-022-22548-1

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