Electrocatalytic ultrafiltration membrane reactors designed from dry-spun self-standing carbon nanotube sheets

Rashed, AO; Huynh, C; Merenda, A; Qin, S; Maghe, M; Kong, L; Kondo, T; Razal, JM; Dumée, LF

Electrocatalytic ultrafiltration membrane reactors designed from dry-spun self-standing carbon nanotube sheets

Rashed, AO Huynh, C Merenda, A

Qin, S Maghe, M Kong, L Kondo, T Razal, JM Dumée, LF

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Publication Type:: Journal Article
Citation:: Chemical Engineering Journal, 2023, 458, pp. 141517
Issue Date:: 2023-02-15

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Field	Value	Language
dc.contributor.author	Rashed, AO
dc.contributor.author	Huynh, C
dc.contributor.author	Merenda, A https://orcid.org/0000-0002-9998-0330
dc.contributor.author	Qin, S
dc.contributor.author	Maghe, M
dc.contributor.author	Kong, L
dc.contributor.author	Kondo, T
dc.contributor.author	Razal, JM
dc.contributor.author	Dumée, LF
dc.date.accessioned	2023-10-09T04:58:20Z
dc.date.available	2023-10-09T04:58:20Z
dc.date.issued	2023-02-15
dc.identifier.citation	Chemical Engineering Journal, 2023, 458, pp. 141517
dc.identifier.issn	1385-8947
dc.identifier.uri	http://hdl.handle.net/10453/172594
dc.description.abstract	The development of electrochemically active ultrafiltration membrane reactors offers promising perspectives to achieve simultaneous separation and degradation of persistent organic pollutants and support triggered self-cleaning of membrane materials upon surface fouling. Here, electro-responsive ultrafiltration membranes were synthesised from drawable carbon nanotubes (CNT) dry-spun as ultra-thin sheets onto preformed carbon nanofibre (CNF) supports to generate a unique class of electrically conductive and flexible ultrafiltration membranes. The pore size of the CNT-based membranes, on the order of ∼ 28 nm, was fine-tuned by controlling the dry layering and orientation of the CNT sheets to manage the membrane selectivity. The CNT-based membranes were used as effective conductive platforms to promote charge transfer during electrocatalytic degradation of acetaminophen, as a model contaminant. The CNT-based membranes, besides offering water permeance up to 2.77 × 103 L.m−2.h−1.bar−1, yielded electrocatalytic kinetic constant up to 46.5 × 10−3 min−1 during combined electrochemical reaction and ultrafiltration process, which is 1.4 to 39 times larger than previously reported values. Such high performance was maintained quite stable even after 8 reuse cycles. These results demonstrate the potential of CNT dry spinning technology for the scalable fabrication of highly permeable, but selective CNT-based membranes with remarkable electrochemical properties towards cost-effective water treatment at an exceptional reaction rate.
dc.language	en
dc.relation.ispartof	Chemical Engineering Journal
dc.relation.isbasedon	10.1016/j.cej.2023.141517
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0904 Chemical Engineering, 0905 Civil Engineering, 0907 Environmental Engineering
dc.subject.classification	Chemical Engineering
dc.subject.classification	4004 Chemical engineering
dc.subject.classification	4011 Environmental engineering
dc.subject.classification	4016 Materials engineering
dc.title	Electrocatalytic ultrafiltration membrane reactors designed from dry-spun self-standing carbon nanotube sheets
dc.type	Journal Article
utslib.citation.volume	458
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
utslib.copyright.status	closed_access	*
dc.date.updated	2023-10-09T04:58:19Z
pubs.publication-status	Published
pubs.volume	458

Abstract:

The development of electrochemically active ultrafiltration membrane reactors offers promising perspectives to achieve simultaneous separation and degradation of persistent organic pollutants and support triggered self-cleaning of membrane materials upon surface fouling. Here, electro-responsive ultrafiltration membranes were synthesised from drawable carbon nanotubes (CNT) dry-spun as ultra-thin sheets onto preformed carbon nanofibre (CNF) supports to generate a unique class of electrically conductive and flexible ultrafiltration membranes. The pore size of the CNT-based membranes, on the order of ∼ 28 nm, was fine-tuned by controlling the dry layering and orientation of the CNT sheets to manage the membrane selectivity. The CNT-based membranes were used as effective conductive platforms to promote charge transfer during electrocatalytic degradation of acetaminophen, as a model contaminant. The CNT-based membranes, besides offering water permeance up to 2.77 × 103 L.m−2.h−1.bar−1, yielded electrocatalytic kinetic constant up to 46.5 × 10−3 min−1 during combined electrochemical reaction and ultrafiltration process, which is 1.4 to 39 times larger than previously reported values. Such high performance was maintained quite stable even after 8 reuse cycles. These results demonstrate the potential of CNT dry spinning technology for the scalable fabrication of highly permeable, but selective CNT-based membranes with remarkable electrochemical properties towards cost-effective water treatment at an exceptional reaction rate.

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http://hdl.handle.net/10453/172594