Efficient water disinfection against antibiotic-resistant bacteria by visible-light heterogeneous photo-Fenton-like process with atomically dispersed Cu on graphitic carbon nitride as the catalyst

Liu, H; Wang, T; Liu, S; Zhou, X; Zhang, L; Sun, Y; Hu, Y; Sharouri, M; Zhang, Y; Teng, Z; Zhang, X; Wang, G; Wang, C

Efficient water disinfection against antibiotic-resistant bacteria by visible-light heterogeneous photo-Fenton-like process with atomically dispersed Cu on graphitic carbon nitride as the catalyst

Liu, H Wang, T Liu, S Zhou, X Zhang, L Sun, Y Hu, Y Sharouri, M Zhang, Y Teng, Z Zhang, X Wang, G

Wang, C

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Chemical Engineering Journal, 2024, 498, pp. 155359
Issue Date:: 2024-10-15

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Field	Value	Language
dc.contributor.author	Liu, H
dc.contributor.author	Wang, T
dc.contributor.author	Liu, S
dc.contributor.author	Zhou, X
dc.contributor.author	Zhang, L
dc.contributor.author	Sun, Y
dc.contributor.author	Hu, Y
dc.contributor.author	Sharouri, M
dc.contributor.author	Zhang, Y
dc.contributor.author	Teng, Z
dc.contributor.author	Zhang, X
dc.contributor.author	Wang, G https://orcid.org/0000-0003-4295-8578
dc.contributor.author	Wang, C
dc.date.accessioned	2025-02-02T23:51:32Z
dc.date.available	2025-02-02T23:51:32Z
dc.date.issued	2024-10-15
dc.identifier.citation	Chemical Engineering Journal, 2024, 498, pp. 155359
dc.identifier.issn	1385-8947
dc.identifier.uri	http://hdl.handle.net/10453/184805
dc.description.abstract	Waterborne microbial contamination poses significant environmental and health risks. Photocatalytic heterogeneous Fenton and Fenton-like processes can offer efficient pathogen removal, with benefits in recycling, solid–liquid separation, and byproduct avoidance. However, their low reaction efficiency and slow kinetics for low-valence metal regeneration are limitations. This study addresses these challenges by incorporating atomically dispersed Cu onto graphitic carbon nitride (g-CN) as a single-atom catalyst (SAC). The Cu atoms are stabilized by pyridinic N atoms through coordination, forming Cu-N4 catalytic sites that enhance photogenerated charge carrier transfer. This leads to a more efficient synergistic photocatalytic-Fenton-like reaction, generating more hydroxyl radicals and achieving effective water disinfection. Results show a 7-log bacterial inactivation of antibiotic-resistant Acinetobacter baumannii within 8 min, surpassing prior photocatalytic-Fenton-like disinfection systems. Density functional theory calculations confirm improved hydrogen peroxide adsorption, electron transport, and electron-hole separation in the Cu-N4 structure. The catalyst's durability and stability were demonstrated through extensive cycling experiments, ion interference tests, and disinfection trials in various water matrices. Additionally, the Cu-SAC@CN catalyst, loaded onto a polytetrafluoroethylene membrane, achieved a 99% bacterial eradication rate within 20 min. This study provides valuable insights into the potential applications of heterogeneous photocatalytic-Fenton-like systems for efficient eradication of waterborne bacteria.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Chemical Engineering Journal
dc.relation.isbasedon	10.1016/j.cej.2024.155359
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	Efficient water disinfection against antibiotic-resistant bacteria by visible-light heterogeneous photo-Fenton-like process with atomically dispersed Cu on graphitic carbon nitride as the catalyst
dc.type	Journal Article
utslib.citation.volume	498
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 Science
pubs.organisational-group	University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	University of Technology Sydney/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Clean Energy Technology (CCET)
utslib.copyright.status	closed_access	*
dc.date.updated	2025-02-02T23:51:29Z
pubs.publication-status	Published
pubs.volume	498

Abstract:

Waterborne microbial contamination poses significant environmental and health risks. Photocatalytic heterogeneous Fenton and Fenton-like processes can offer efficient pathogen removal, with benefits in recycling, solid–liquid separation, and byproduct avoidance. However, their low reaction efficiency and slow kinetics for low-valence metal regeneration are limitations. This study addresses these challenges by incorporating atomically dispersed Cu onto graphitic carbon nitride (g-CN) as a single-atom catalyst (SAC). The Cu atoms are stabilized by pyridinic N atoms through coordination, forming Cu-N4 catalytic sites that enhance photogenerated charge carrier transfer. This leads to a more efficient synergistic photocatalytic-Fenton-like reaction, generating more hydroxyl radicals and achieving effective water disinfection. Results show a 7-log bacterial inactivation of antibiotic-resistant Acinetobacter baumannii within 8 min, surpassing prior photocatalytic-Fenton-like disinfection systems. Density functional theory calculations confirm improved hydrogen peroxide adsorption, electron transport, and electron-hole separation in the Cu-N4 structure. The catalyst's durability and stability were demonstrated through extensive cycling experiments, ion interference tests, and disinfection trials in various water matrices. Additionally, the Cu-SAC@CN catalyst, loaded onto a polytetrafluoroethylene membrane, achieved a 99% bacterial eradication rate within 20 min. This study provides valuable insights into the potential applications of heterogeneous photocatalytic-Fenton-like systems for efficient eradication of waterborne bacteria.

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