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Research Article | Open Access

Design of cobalt-based catalysts with the uniformly distributed core-shell structure for ultra-efficient activation of peroxymonosulfate for tetracycline degradation

Hongjie Qin, Weijie Zhang, Qiling Zheng, Penghui Zhang, Shouwei Zhang( ), Xijin Xu( )
School of Physics and Technology, University of Jinan, 336 West Road of Nan Xinzhuang, Jinan, 250022, Shandong, China

Peer review under responsibility of The Chinese Ceramic Society.

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Graphical Abstract

Abstract

Catalysts that can rapidly degrade tetracycline (TC) in water without introducing secondary ion pollution have always been challenging. Herein, a cobalt-based catalyst (CoO@P-C) is prepared so that CoO quantum particles (5–10 nm) are uniformly distributed on a linear substrate, and the outer layer is covered with a shell (P-C). The quantum particles of CoO provide many active sites for the reaction, which ensures the efficient degradation effect of the catalyst, and 30 mg/L TC can be completely degraded in only 5 min. The shell of the quantum particles' outer layer can effectively reduce ions' extravasation. The combination of the shell-like structure and the linear substrate greatly enhances the catalysis's stability and ensures that the catalyst is prepared into a film for practical application. The high catalytic activity of CoO@P-C is mainly due to the following factors: (1) Uniformly distributed ultra-small nanoparticles can provide many active sites. (2) The microenvironment formed by the core-shell structure enhances not only catalytic stability but also provides the driving force to improve the reaction rate. (3) The composite of CoO and P-C core-shell structure can accelerate electron transfer and generate many reactive oxygen species in a short time, which makes TC degrade extremely rapidly.

Keywords

Cobalt quantum particlesPeroxymonosulfate (PMS) activationSuperoxideCore-shell structureTetracycline

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Journal of Materiomics
Volume 9 Issue 5,
September 2023
Pages 882-891
DOI: 10.1016/j.jmat.2023.02.011
Cite this article:
Qin H, Zhang W, Zheng Q, et al. Design of cobalt-based catalysts with the uniformly distributed core-shell structure for ultra-efficient activation of peroxymonosulfate for tetracycline degradation. Journal of Materiomics, 2023, 9(5): 882-891. https://doi.org/10.1016/j.jmat.2023.02.011

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Received: 10 December 2022
Revised: 10 February 2023
Accepted: 13 February 2023
Published: 21 March 2023
© 2023

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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