Lattice doping of Zn boosts oxygen vacancies in Co<inf>3</inf>O<inf>4</inf> Nanocages: Improving persulfate activation via forming Surface-Activated complex

Wang, MM; Liu, LJ; Xi, JR; Ding, Y; Liu, PX; Mao, L; Ni, BJ; Wang, WK; Xu, J

Lattice doping of Zn boosts oxygen vacancies in Co<inf>3</inf>O<inf>4</inf> Nanocages: Improving persulfate activation via forming Surface-Activated complex

Wang, MM Liu, LJ Xi, JR Ding, Y Liu, PX Mao, L Ni, BJ Wang, WK Xu, J

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Publisher:: ELSEVIER SCIENCE SA
Publication Type:: Journal Article
Citation:: Chemical Engineering Journal, 2023, 451
Issue Date:: 2023-01-01

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Field	Value	Language
dc.contributor.author	Wang, MM
dc.contributor.author	Liu, LJ
dc.contributor.author	Xi, JR
dc.contributor.author	Ding, Y
dc.contributor.author	Liu, PX
dc.contributor.author	Mao, L
dc.contributor.author	Ni, BJ
dc.contributor.author	Wang, WK
dc.contributor.author	Xu, J
dc.date.accessioned	2023-03-23T02:16:37Z
dc.date.available	2023-03-23T02:16:37Z
dc.date.issued	2023-01-01
dc.identifier.citation	Chemical Engineering Journal, 2023, 451
dc.identifier.issn	1385-8947
dc.identifier.issn	1873-3212
dc.identifier.uri	http://hdl.handle.net/10453/168159
dc.description.abstract	The presence of oxygen vacancies (OVs) promotes persulfate activation. However, rational modulation of OVs without compromising the inherent structure of catalysts is challenging. Herein, novel OVs-enriched hollow ZnCo2O4 nanocages are synthesized based on a bimetallic ZIF-67@ZIF-8 precursor for efficient peroxydisulfate (PDS) activation. The incorporation of Zn into the lattice of Co3O4 boosts the number of OVs in the catalysts while preserving the morphology of Co3O4 nanocages derived from metal-organic framework (MOFs) templates. As a result, the degradation rate of organic pollutants such as bisphenol A is improved by over 20 times in the developed PDS activation system. OVs promote the formation of a surface-activated complex from PDS onto the catalyst surface, which can subsequently deprive electrons from pollutants. The developed PDS activation system is resistant to Cl−, NO3− and humic acid at environmental concentrations. This system adapts to selectively degrade organic pollutants with low ionic potential, and shows applicable potential in practical packaging wastewater treatment. The decreased catalytic performance of catalysts during utilization can be recovered with a facile thermal treatment. Our work constructs OV active sites on Co3O4 nanocages while preserving their original structural superiorities, providing a new strategy to functionalize MOF-derived materials.
dc.language	English
dc.publisher	ELSEVIER SCIENCE SA
dc.relation.ispartof	Chemical Engineering Journal
dc.relation.isbasedon	10.1016/j.cej.2022.138605
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0904 Chemical Engineering, 0905 Civil Engineering, 0907 Environmental Engineering
dc.subject.classification	Chemical Engineering
dc.title	Lattice doping of Zn boosts oxygen vacancies in Co<inf>3</inf>O<inf>4</inf> Nanocages: Improving persulfate activation via forming Surface-Activated complex
dc.type	Journal Article
utslib.citation.volume	451
utslib.for	0904 Chemical Engineering
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental Engineering
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
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access	*
dc.date.updated	2023-03-23T02:16:10Z
pubs.publication-status	Published
pubs.volume	451

Abstract:

The presence of oxygen vacancies (OVs) promotes persulfate activation. However, rational modulation of OVs without compromising the inherent structure of catalysts is challenging. Herein, novel OVs-enriched hollow ZnCo2O4 nanocages are synthesized based on a bimetallic ZIF-67@ZIF-8 precursor for efficient peroxydisulfate (PDS) activation. The incorporation of Zn into the lattice of Co3O4 boosts the number of OVs in the catalysts while preserving the morphology of Co3O4 nanocages derived from metal-organic framework (MOFs) templates. As a result, the degradation rate of organic pollutants such as bisphenol A is improved by over 20 times in the developed PDS activation system. OVs promote the formation of a surface-activated complex from PDS onto the catalyst surface, which can subsequently deprive electrons from pollutants. The developed PDS activation system is resistant to Cl−, NO3− and humic acid at environmental concentrations. This system adapts to selectively degrade organic pollutants with low ionic potential, and shows applicable potential in practical packaging wastewater treatment. The decreased catalytic performance of catalysts during utilization can be recovered with a facile thermal treatment. Our work constructs OV active sites on Co3O4 nanocages while preserving their original structural superiorities, providing a new strategy to functionalize MOF-derived materials.

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http://hdl.handle.net/10453/168159