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Graphitized Cu-β-cyclodextrin polymer driving an efficient dual-reaction-center Fenton-like process by utilizing electrons of pollutants for water purification.
- Source :
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Journal of environmental sciences (China) [J Environ Sci (China)] 2023 Apr; Vol. 126, pp. 565-574. Date of Electronic Publication: 2022 May 22. - Publication Year :
- 2023
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Abstract
- Excessive consumption of energy and resources is a major challenge in wastewater treatment. Here, a novel heterogeneous Fenton-like catalyst consisting of Cu-doped graphene-like catalysts (Cu-GCD NSs) was first synthesized by an enhanced carbothermal reduction of β-cyclodextrin (β-CD). The catalyst exhibits excellent Fenton-like catalytic activity for the degradation of various pollutants under neutral conditions, accompanied by low H <subscript>2</subscript> O <subscript>2</subscript> consumption. The results of structural characterization and theoretical calculations confirmed that the dual reaction centers (DRCs) were constructed on Cu-GCD NSs surface through C-O-Cu bonds supported on zero-valent copper species, which play a significant role in the high-performance Fenton-like reaction. The pollutants that served as electron donors were decomposed in the electron-poor carbon centers, whereas H <subscript>2</subscript> O <subscript>2</subscript> and dissolved oxygen obtained these electrons in the electron-rich Cu centers through C-O-Cu bonds, thereby producing more active species. This study demonstrates that the electrons of pollutants can be efficiently utilized in Fenton-like reactions by DRCs on the catalyst surface, which provides an effective strategy to improve Fenton-like reactivity and reduce H <subscript>2</subscript> O <subscript>2</subscript> consumption.<br />Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationship that could have appeared to influence the work reported in this article.<br /> (Copyright © 2022. Published by Elsevier B.V.)
Details
- Language :
- English
- ISSN :
- 1001-0742
- Volume :
- 126
- Database :
- MEDLINE
- Journal :
- Journal of environmental sciences (China)
- Publication Type :
- Academic Journal
- Accession number :
- 36503782
- Full Text :
- https://doi.org/10.1016/j.jes.2022.05.022