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Trimetallic carbon-based catalysts derived from metal-organic frameworks for electro-Fenton removal of aqueous pesticides

Yu, Menglin and Dong, Heng and Zheng, Yingdie and Liu, Weiping (2022) Trimetallic carbon-based catalysts derived from metal-organic frameworks for electro-Fenton removal of aqueous pesticides. Science of the Total Environment, 818 . Art. No. 151747. ISSN 0048-9697. doi:10.1016/j.scitotenv.2021.151747. https://resolver.caltech.edu/CaltechAUTHORS:20211129-456789123

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Abstract

Pesticide overuse has posed a threat to agricultural community as well as aquatic animals. Heterogeneous electro-Fenton (HEF) processes have received considerable attention for aqueous contaminants removal, and metal-organic frameworks (MOFs) serve as promising templates for fabrication of carbon-based HEF catalysts with low Fe leaching and enhanced stability. Herein, multimetallic MOF-derived HEF catalysts CMOFs@PCM have been demonstrated as efficient and stable HEF catalysts for aqueous pesticide degradation and mineralization. The porous carbon monolith (PCM) substrate effectively catalyzed 2-electron oxygen reduction reaction (ORR) over the pH range of 4–10 to in situ generate H₂O₂, which was then activated by the anchored Fe₃O₄, Fe₃C and NiO into OH for pesticide degradation. Fe₈Al₇Ni₅-CMOF@PCM achieved over 90% napropamide degradation within 60 min in the pH range of 4–10, and 96% degradation at neutral condition, 39% higher than monometallic CMIL-88(Fe)@PCM. Meanwhile, the embedded NiO and γ-Al2O₃ showed synergistic effect in promoting the catalytic activity of Fe sites, resulting in substantially enhanced performance of trimetallic Fe_xAl_yNi_z-CMOF@PCM compared to the monometallic counterparts. On the other hand, the unique core-shell structure and Fe₃C interlayer formed by co-pyrolyzing Fe-containing MOFs-NH₂ with PCM greatly minimized the metal leaching and enhanced the stability of the electrocatalysts.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.scitotenv.2021.151747DOIArticle
ORCID:
AuthorORCID
Dong, Heng0000-0002-4168-7297
Liu, Weiping0000-0002-1173-892X
Additional Information:© 2021 Elsevier. Received 31 August 2021, Revised 9 November 2021, Accepted 13 November 2021, Available online 23 November 2021. This work was supported by National Natural Science Foundations of China (Grant No. 21777137) and International Cooperation Grant of China (Grant No. 21320102007). CRediT authorship contribution statement: Menglin Yu: Conceptualization, Methodology, Investigation, Formal analysis, Data curation, Writing – review & editing. Heng Dong: Methodology, Investigation, Formal analysis, Data curation, Writing – original draft, Validation. Yingdie Zheng: Investigation. Weiping Liu: Funding acquisition, Resources, Project administration, Supervision, Writing – review & editing. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Funders:
Funding AgencyGrant Number
National Natural Science Foundation of China21777137
National Natural Science Foundation of China21320102007
Subject Keywords:Pesticide; Water remediation; Advanced oxidation process; Oxygen reduction reaction; Metal synergy
DOI:10.1016/j.scitotenv.2021.151747
Record Number:CaltechAUTHORS:20211129-456789123
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20211129-456789123
Official Citation:Menglin Yu, Heng Dong, Yingdie Zheng, Weiping Liu, Trimetallic carbon-based catalysts derived from metal-organic frameworks for electro-Fenton removal of aqueous pesticides, Science of The Total Environment, Volume 818, 2022, 151747, ISSN 0048-9697, https://doi.org/10.1016/j.scitotenv.2021.151747.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:112060
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:29 Nov 2021 08:59
Last Modified:08 Nov 2022 00:42

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