Nitrogen-containing carbon hollow nanocube-confined cobalt nanoparticle as a magnetic and efficient catalyst for activating monopersulfate to degrade a UV filter in water

Journal article

Authors/Editors

SONGKEART PHATTARAPATTAMAWONG

Strategic Research Themes

Water management (Earth System & Climate Change)

Publication Details

Author list: Tuan D.D., Kwon E., Phattarapattamawong S., Thanh B.X., Khiem T.C., Lisak G., Wang H., Lin K.-Y.A.

Publisher: Elsevier

Publication year: 2022

Volume number: 10

Issue number: 2

ISSN: 2213-3437

eISSN: 2213-3437

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85122514099&doi=10.1016%2fj.jece.2021.106989&partnerID=40&md5=62cc0dbafabceac85f6d369140462a77

Languages: English-Great Britain (EN-GB)

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Abstract

While bis(4-hydroxyphenyl) ketone (BHK) represents one of the most typical UV filters, which, however, exhibits xenohormone toxicities, very few studies exist for investigating elimination of BHK from water. As sulfate radical-based oxidation processes are validated for degrading emerging contaminants, this current work attempts developing advantageous sulfate radical-based processes through activating monopersulfate (MPS) for eliminating BHK in water. Since cobalt (Co)-containing catalysts are effective catalysts for MPS activation, this study proposes to develop a Co NP-containing catalyst, in which Co NPs are confined in hollow N-containing carbon nanocube (HCoNC) derived from a cobaltic metal-organic framework (Co-MOF). The cubic Co-MOF would be firstly afforded through a surfactant-assisted method. The resultant cubic Co-MOF would be then modified with tannic acid (TAA) to etch its interior for affording the cubic Co-MOF with the hollow structure, which is subsequently converted into Co NP-containing hollow N- containing carbon nanocube (HCoNC) through carbonization. HCoNC can exhibit significantly superior catalytic activities than the non-hollow CoNC and Co3O4 nanoparticles for MPS activation to BHK degradation. The activation energy (Ea) for degrading BHK by MPS is 45.3 kJ/mol, which is much lower than reported values. HCoNC could be reusable over 5 consecutive BHK degradation cycles without decreasing catalytic activities. The MPS activation and plausible BHK degradation route by HCoNC+MPS is elucidated by experimental investigations as well as density functional theory (DFT) calculation to provide insightful mechanism of BHK degradation process. © 2022

Keywords

Bis(4-hydroxyphenyl) ketone, Etching, Peroxymonosulfate, UV filters