Recycling spent water treatment adsorbents for efficient electrocatalytic water oxidation reaction

Chen, Z; Zheng, R; Wei, W; Wei, W; Zou, W; Li, J; Ni, BJ; Chen, H

Recycling spent water treatment adsorbents for efficient electrocatalytic water oxidation reaction

Chen, Z

Zheng, R Wei, W

Wei, W

Zou, W Li, J Ni, BJ Chen, H

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Publisher:: ELSEVIER
Publication Type:: Journal Article
Citation:: Resources, Conservation and Recycling, 2022, 178
Issue Date:: 2022-03-01

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Field	Value	Language
dc.contributor.author	Chen, Z https://orcid.org/0000-0003-0627-0856
dc.contributor.author	Zheng, R
dc.contributor.author	Wei, W https://orcid.org/0000-0001-5613-337X
dc.contributor.author	Wei, W https://orcid.org/0000-0001-5613-337X
dc.contributor.author	Zou, W
dc.contributor.author	Li, J
dc.contributor.author	Ni, BJ
dc.contributor.author	Chen, H
dc.date.accessioned	2023-03-23T22:16:45Z
dc.date.available	2023-03-23T22:16:45Z
dc.date.issued	2022-03-01
dc.identifier.citation	Resources, Conservation and Recycling, 2022, 178
dc.identifier.issn	0921-3449
dc.identifier.issn	1879-0658
dc.identifier.uri	http://hdl.handle.net/10453/168246
dc.description.abstract	Heavy metal contaminated spent adsorbents are of great environmental concern due to their hazardous effects and large-scale accumulation in the natural environment. Converting massive spent adsorbents into efficient electrocatalysts with a facile strategy can address the challenge of growing energy demand and achieving carbon neutral goal. Herein, we demonstrated a "spent adsorbents to heterostructured electrocatalysts" conversion strategy based on the "waste-to-wealth" principle. Via a facile boriding process, the metal ions laden biochar-based spent adsorbents (SA) have been totally transformed into magnetic metal borides/biochar heterostructures, which exhibit excellent activities towards oxygen evolution reaction. The optimized NiCuFeB/SA catalyst takes a low overpotential of 251 mV to drive a current density of 10 mA cm−2, outperforming many Ni/Fe-based catalysts synthesized from commercial material resources. Comprehensive analyses suggest the high catalytic efficiency mainly attributes to the porous biochar confined well-dispersed nano-sized metallic borides, the in-situ evolved active metal (oxy)hydroxides, favourable charge-transfer kinetics, as well as the heterostructure and amorphous feature. This work offers a general strategy to efficiently reutilize the spent metal-bearing biochar-based adsorbents, which can be extended to advanced energy applications-oriented reutilization of other metal-contaminated solid wastes in an economically and environmental-benign manner.
dc.language	English
dc.publisher	ELSEVIER
dc.relation	http://purl.org/au-research/grants/arc/FT160100195
dc.relation.ispartof	Resources, Conservation and Recycling
dc.relation.isbasedon	10.1016/j.resconrec.2021.106037
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	05 Environmental Sciences, 09 Engineering, 12 Built Environment and Design
dc.subject.classification	Environmental Sciences
dc.title	Recycling spent water treatment adsorbents for efficient electrocatalytic water oxidation reaction
dc.type	Journal Article
utslib.citation.volume	178
utslib.for	05 Environmental Sciences
utslib.for	09 Engineering
utslib.for	12 Built Environment and Design
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	2023-03-23T22:16:44Z
pubs.publication-status	Published
pubs.volume	178

Abstract:

Heavy metal contaminated spent adsorbents are of great environmental concern due to their hazardous effects and large-scale accumulation in the natural environment. Converting massive spent adsorbents into efficient electrocatalysts with a facile strategy can address the challenge of growing energy demand and achieving carbon neutral goal. Herein, we demonstrated a "spent adsorbents to heterostructured electrocatalysts" conversion strategy based on the "waste-to-wealth" principle. Via a facile boriding process, the metal ions laden biochar-based spent adsorbents (SA) have been totally transformed into magnetic metal borides/biochar heterostructures, which exhibit excellent activities towards oxygen evolution reaction. The optimized NiCuFeB/SA catalyst takes a low overpotential of 251 mV to drive a current density of 10 mA cm−2, outperforming many Ni/Fe-based catalysts synthesized from commercial material resources. Comprehensive analyses suggest the high catalytic efficiency mainly attributes to the porous biochar confined well-dispersed nano-sized metallic borides, the in-situ evolved active metal (oxy)hydroxides, favourable charge-transfer kinetics, as well as the heterostructure and amorphous feature. This work offers a general strategy to efficiently reutilize the spent metal-bearing biochar-based adsorbents, which can be extended to advanced energy applications-oriented reutilization of other metal-contaminated solid wastes in an economically and environmental-benign manner.

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http://hdl.handle.net/10453/168246