Efficient removal of tetrabromobisphenol A through persulfate activation by α-MnO<inf>2</inf> nanofiber coated with graphene oxide

Chen, H; Tian, K; Qing, T; Liu, X; Mao, J; Qin, J; Jiang, S

Efficient removal of tetrabromobisphenol A through persulfate activation by α-MnO<inf>2</inf> nanofiber coated with graphene oxide

Chen, H Tian, K Qing, T Liu, X Mao, J Qin, J Jiang, S

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Applied Surface Science, 2023, 641, pp. 158445
Issue Date:: 2023-12-30

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Field	Value	Language
dc.contributor.author	Chen, H
dc.contributor.author	Tian, K
dc.contributor.author	Qing, T
dc.contributor.author	Liu, X
dc.contributor.author	Mao, J
dc.contributor.author	Qin, J
dc.contributor.author	Jiang, S
dc.date.accessioned	2024-04-25T00:39:25Z
dc.date.available	2024-04-25T00:39:25Z
dc.date.issued	2023-12-30
dc.identifier.citation	Applied Surface Science, 2023, 641, pp. 158445
dc.identifier.issn	0169-4332
dc.identifier.uri	http://hdl.handle.net/10453/178354
dc.description.abstract	The development of efficient and environmentally friendly catalysts for activating persulfate is the focus of advanced oxidation treatment of organic contaminants. Manganese dioxide (MnO2), which has a multivalent nature and is a low-toxic natural stock, has the ability to immediately oxidize pollutants. In order to further improve its catalytic performance, the α-MnO2 nanofiber coated with graphene oxide (α-MnO2@GO) was prepared by one-step hydrothermal method, and worked as a peroxmonsulfate (PMS) activator for efficient degradation of tetrabromobisphenol A (TBBPA). The structure characterization results indicate that α-MnO2 nanofibers are successfully encapsulated by graphene and assembled into a three-dimensional layered structure. The factors affecting the catalytic degradation of TBBPA by this catalyst are investigated in detail. Under optimal conditions, the highest removal ratio of TBBPA could reach 100% after treatment of 20 min by α-MnO2@GO/PMS system, and a good mineralization efficiency of up to 79.50% is obtained. Electron paramagnetic resonance detection combined with quenching experiments showed that sulfate radical and hydroxyl radical played a role in the degradation of TBBPA. Based on X-ray photoelectron spectroscopy and free radical scavenging experiments, the peroxmonsulfate activation mechanism by α-MnO2@GO was proposed. Finally, based on the discovered intermediates, two potential TBBPA degradation routes using this catalyst were suggested. This study not only provides a new strategy for improving the catalytic activity of MnO2 but also sheds new insight into the application of eco-friendly natural stock for environmental remediation.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Applied Surface Science
dc.relation.isbasedon	10.1016/j.apsusc.2023.158445
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Applied Physics
dc.title	Efficient removal of tetrabromobisphenol A through persulfate activation by α-MnO<inf>2</inf> nanofiber coated with graphene oxide
dc.type	Journal Article
utslib.citation.volume	641
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2024-04-25T00:39:13Z
pubs.publication-status	Published
pubs.volume	641

Abstract:

The development of efficient and environmentally friendly catalysts for activating persulfate is the focus of advanced oxidation treatment of organic contaminants. Manganese dioxide (MnO2), which has a multivalent nature and is a low-toxic natural stock, has the ability to immediately oxidize pollutants. In order to further improve its catalytic performance, the α-MnO2 nanofiber coated with graphene oxide (α-MnO2@GO) was prepared by one-step hydrothermal method, and worked as a peroxmonsulfate (PMS) activator for efficient degradation of tetrabromobisphenol A (TBBPA). The structure characterization results indicate that α-MnO2 nanofibers are successfully encapsulated by graphene and assembled into a three-dimensional layered structure. The factors affecting the catalytic degradation of TBBPA by this catalyst are investigated in detail. Under optimal conditions, the highest removal ratio of TBBPA could reach 100% after treatment of 20 min by α-MnO2@GO/PMS system, and a good mineralization efficiency of up to 79.50% is obtained. Electron paramagnetic resonance detection combined with quenching experiments showed that sulfate radical and hydroxyl radical played a role in the degradation of TBBPA. Based on X-ray photoelectron spectroscopy and free radical scavenging experiments, the peroxmonsulfate activation mechanism by α-MnO2@GO was proposed. Finally, based on the discovered intermediates, two potential TBBPA degradation routes using this catalyst were suggested. This study not only provides a new strategy for improving the catalytic activity of MnO2 but also sheds new insight into the application of eco-friendly natural stock for environmental remediation.

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http://hdl.handle.net/10453/178354