An innovative AgI/MIL-100(Fe) Z-scheme heterojunction for simultaneously enhanced photoreduction of Cr(VI) and antibacterial activity

Wang, Q; Zhang, K; Zheng, S; Hu, X; Wang, L; Du, H; Hao, D; Yang, G

An innovative AgI/MIL-100(Fe) Z-scheme heterojunction for simultaneously enhanced photoreduction of Cr(VI) and antibacterial activity

Wang, Q Zhang, K Zheng, S Hu, X Wang, L Du, H Hao, D Yang, G

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Applied Surface Science, 2023, 616, pp. 156528
Issue Date:: 2023-04-15

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Field	Value	Language
dc.contributor.author	Wang, Q
dc.contributor.author	Zhang, K
dc.contributor.author	Zheng, S
dc.contributor.author	Hu, X
dc.contributor.author	Wang, L
dc.contributor.author	Du, H
dc.contributor.author	Hao, D
dc.contributor.author	Yang, G
dc.date.accessioned	2024-04-16T21:43:31Z
dc.date.available	2024-04-16T21:43:31Z
dc.date.issued	2023-04-15
dc.identifier.citation	Applied Surface Science, 2023, 616, pp. 156528
dc.identifier.issn	0169-4332
dc.identifier.uri	http://hdl.handle.net/10453/177979
dc.description.abstract	Designing photocatalysts with excellent photocatalytic performance and strong redox properties is a challenging task. In this study, a novel Z-scheme heterojunction AgI/MIL-100 nanocomposite with retaining redox properties was successfully fabricated by a simple precipitation method. According to the experimental results, the Z-scheme heterostructure can significantly improve the charge transfer efficiency between interfaces of heterojunction. In addition, it could generate reactive oxygen species (ROS) and had excellent photocatalytic effects on E. coli and S. aureus inactivation and Cr(VI) reduction. Furthermore, the ROS enhancement process was further confirmed by nitroblue tetrazolium (NBT) and terephthalic acid (TA) conversion experiments. When the mass ratio of AgI to MIL-100(Fe) was 1:10 (named AM-10), it displayed optimal photocatalytic activity toward Cr(VI) reduction. The Cr(VI) could be completely reduced within 75 min under LED light irradiation. The reduction rate of Cr(VI) by AM-10 was 15.3-fold and 2.6-fold of that by AgI and MIL-100(Fe), respectively. Moreover, after 5 cycles of Cr(VI) reduction, it could still achieve good stability. Furthermore, it could completely kill E. coli and S. aureus at 107 CFU/mL within 45 min. Capture experiments confirmed that the main antibacterial active species were h+ and [rad]O2-. Therefore, this study can provide an environmentally friendly photocatalytic process using Z-scheme heterojunction nanocomposites with dual purification functions.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Applied Surface Science
dc.relation.isbasedon	10.1016/j.apsusc.2023.156528
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Applied Physics
dc.title	An innovative AgI/MIL-100(Fe) Z-scheme heterojunction for simultaneously enhanced photoreduction of Cr(VI) and antibacterial activity
dc.type	Journal Article
utslib.citation.volume	616
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	2024-04-16T21:43:21Z
pubs.publication-status	Published
pubs.volume	616

Abstract:

Designing photocatalysts with excellent photocatalytic performance and strong redox properties is a challenging task. In this study, a novel Z-scheme heterojunction AgI/MIL-100 nanocomposite with retaining redox properties was successfully fabricated by a simple precipitation method. According to the experimental results, the Z-scheme heterostructure can significantly improve the charge transfer efficiency between interfaces of heterojunction. In addition, it could generate reactive oxygen species (ROS) and had excellent photocatalytic effects on E. coli and S. aureus inactivation and Cr(VI) reduction. Furthermore, the ROS enhancement process was further confirmed by nitroblue tetrazolium (NBT) and terephthalic acid (TA) conversion experiments. When the mass ratio of AgI to MIL-100(Fe) was 1:10 (named AM-10), it displayed optimal photocatalytic activity toward Cr(VI) reduction. The Cr(VI) could be completely reduced within 75 min under LED light irradiation. The reduction rate of Cr(VI) by AM-10 was 15.3-fold and 2.6-fold of that by AgI and MIL-100(Fe), respectively. Moreover, after 5 cycles of Cr(VI) reduction, it could still achieve good stability. Furthermore, it could completely kill E. coli and S. aureus at 107 CFU/mL within 45 min. Capture experiments confirmed that the main antibacterial active species were h+ and [rad]O2-. Therefore, this study can provide an environmentally friendly photocatalytic process using Z-scheme heterojunction nanocomposites with dual purification functions.

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http://hdl.handle.net/10453/177979