Covalent organic polymer derived carbon nanocapsule–supported cobalt as a catalyst for activating monopersulfate to degrade salicylic acid

Tuan, D. D., Chang, F.-C., Chen, P.-Y., Kwon, E., You, S. , Tong, S. and Lin, K.-Y. A. (2021) Covalent organic polymer derived carbon nanocapsule–supported cobalt as a catalyst for activating monopersulfate to degrade salicylic acid. Journal of Environmental Chemical Engineering, 9(4), 105377. (doi: 10.1016/j.jece.2021.105377)

Abstract

As salicylic acid (SAC) is an extensively used pharmaceutical, discharge of SAC into the environment has caused serious threats to ecology in view of its toxicity. Therefore, SO4•−-involved chemical oxidation methods have been employed for eliminating SAC. Since monopersulfate (MPS) has become a popular reagent for producing SO4•−, an alternative heterogeneous Co-based catalyst is proposed by using a Co-coordinated covalent organic polymers (Co-COP) as a precursor. Via carbonization, Co-COP is transferred by conversion of Co ions to Co/CoO nanoparticle and conversion of COP to N-doped carbon nanocapsules (CNC), respectively, to form a unique composite of Co NPs embedded into carbon nanocapsule (CoCNC). CoCNC exhibits a higher catalytic activity than Co3O4 nanoparticle for activating MPS to degrade SAC because of synergistic effects between Co NPs and the N-doped CNC which not only acts as the support but also provides active sites. Hence, CoCNC+MPS could afford a much lower Ea value (25.4 kJ/mol) of SAC degradation than the reported values. Moreover, CoCNC is still efficient for removing SAC even in the presence of high-concentration NaCl and SDS. CoCNC can be also recyclable over many cycles and maintain its catalytic activities, confirming that CoCNC is an advantageous catalyst for MPS activation.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: You, Dr Siming

Creator Roles

You, S.: Visualization, Investigation

• Authors: Tuan, D. D., Chang, F.-C., Chen, P.-Y., Kwon, E., You, S., Tong, S., and Lin, K.-Y. A.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Journal of Environmental Chemical Engineering
• Publisher: Elsevier
• ISSN: 2213-3437
• ISSN (Online): 2213-3437
• Published Online: 20 March 2021
• Copyright Holders: Copyright © 2021 Elsevier Ltd.
• First Published: First published in Journal of Environmental Chemical Engineering 9(4): 105377
• Publisher Policy: Reproduced in accordance with the publisher copyright policy