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Cobalt leaching inhibition: Transforming coordination polymers into spherical Co3O4@NC catalysts for accelerated tetracycline degradation via enhanced PMS activation
Citation
Ma, R., Zhou, G., Gu, M., Tang, X., Ding, W., Guan, Y., Jiang, Y., Yin, J., Zhang, L., & Ang, E. H. (2023). Cobalt leaching inhibition: Transforming coordination polymers into spherical Co3O4@NC catalysts for accelerated tetracycline degradation via enhanced PMS activation. Applied Surface Science, 648, Article 158980. https://doi.org/10.1016/j.apsusc.2023.158980
Author
Ma, Rongyao
•
Zhou, Guolang
•
Gu, Mingrui
•
Tang, Xin
•
Ding, Wenhao
•
Guan, Yu
•
Jiang, Yexin
•
Yin, Jingzhou
•
Zhang, Lili
•
Abstract
In this study, we synthesized Co-based coordination polymer-derived nitrogen-doped carbon-coated Co3O4 spheres (Co3O4@NC) and yolk-shell Co3O4 spheres (Co3O4-YS) under various atmospheric conditions to explore their efficacy in activating peroxymonosulfate (PMS) for tetracycline (TC) degradation. The Co3O4@NC, featuring a significantly higher specific surface area (268.4 m2/g), exhibited remarkable performance by achieving 90% TC removal in 5 minutes using 0.2 g/L PMS and 0.1 g/L of Co3O4@NC. This reaction rate was 9.2 times higher than that observed with Co3O4-YS. Furthermore, the Co3O4@NC/PMS system demonstrated exceptional stability across a wide pH range, in complex water compositions, and the presence of common coexisting ions. The unique coated structures effectively minimized the leaching of Co ions (below 0.447 mg/L). Additionally, the strong magnetism of Co3O4@NC allows for easy separation under a magnetic field. Mechanistic investigations identified 1O2, ∙OH, O2∙-, and SO4∙- as the principal reactive species. The study also explored potential degradation pathways and toxicity.
Date Issued
2023
Publisher
Elsevier
Journal
Applied Surface Science
DOI
10.1016/j.apsusc.2023.158980
Grant ID
BE2020772
20KJA430008
HAQ202201
202310323039Z)
Funding Agency
Jiangsu Key Research and Development Project
Major Basic Research Project of the Natural Science Foundation of the Jiangsu Higher Education Institutions
Huai’an Key Research and Development Plan
National Training Programs of Innovation and Entrepreneurship for Undergraduates