Highly Sensitive H<inf>2</inf>Sensors Based on Co<inf>3</inf>O<inf>4</inf>/PEI-CNTs at Room Temperature

Gao, L; Li, S; Xu, X; Zou, C; Zhang, G

Highly Sensitive H<inf>2</inf>Sensors Based on Co<inf>3</inf>O<inf>4</inf>/PEI-CNTs at Room Temperature

Gao, L Li, S Xu, X

Zou, C Zhang, G

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Publisher:: HINDAWI LTD
Publication Type:: Journal Article
Citation:: Journal of Nanomaterials, 2022, 2022
Issue Date:: 2022-01-01

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Field	Value	Language
dc.contributor.author	Gao, L
dc.contributor.author	Li, S
dc.contributor.author	Xu, X https://orcid.org/0000-0002-2598-3766
dc.contributor.author	Zou, C
dc.contributor.author	Zhang, G
dc.contributor.editor	Xiao, ZL
dc.date.accessioned	2023-02-28T03:21:31Z
dc.date.available	2023-02-28T03:21:31Z
dc.date.issued	2022-01-01
dc.identifier.citation	Journal of Nanomaterials, 2022, 2022
dc.identifier.issn	1687-4110
dc.identifier.issn	1687-4129
dc.identifier.uri	http://hdl.handle.net/10453/166507
dc.description.abstract	The highly dispersed Co3O4 on the surface of CNTs modified with polyethylenimine (PEI) was synthesized using the hydrothermal method. In the CNT-Co3O4 composite materials, CNTs not only provide the substrate for the Co3O4 nanoparticles but also prevent their aggregation. Furthermore, the interaction between Co3O4 and CNTs modified with polyethylenimine (PEI) helps to improve the gas sensing performance. In particular, the CNT-Co3O4 composite synthesized at 190°C shows the outstanding sensitive characteristics to H2 with a lower detection limit of 30 ppm at room temperature. The obtained CNT-Co3O4 sensor displays excellent selectivity and stability to H2. The energy band model of the conductive mechanism has been built to explain the resistance change when the gas sensor is exposed to the H2. Hence, the CNT-Co3O4 composite material presents highly promising applications in H2 gas sensing.
dc.language	English
dc.publisher	HINDAWI LTD
dc.relation.ispartof	Journal of Nanomaterials
dc.relation.isbasedon	10.1155/2022/4743040
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0912 Materials Engineering, 1007 Nanotechnology
dc.subject.classification	Nanoscience & Nanotechnology
dc.title	Highly Sensitive H<inf>2</inf>Sensors Based on Co<inf>3</inf>O<inf>4</inf>/PEI-CNTs at Room Temperature
dc.type	Journal Article
utslib.citation.volume	2022
utslib.for	0912 Materials Engineering
utslib.for	1007 Nanotechnology
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 Biomedical Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - IBMD - Initiative for Biomedical Devices
utslib.copyright.status	open_access	*
dc.date.updated	2023-02-28T03:21:30Z
pubs.publication-status	Published
pubs.volume	2022

Abstract:

The highly dispersed Co3O4 on the surface of CNTs modified with polyethylenimine (PEI) was synthesized using the hydrothermal method. In the CNT-Co3O4 composite materials, CNTs not only provide the substrate for the Co3O4 nanoparticles but also prevent their aggregation. Furthermore, the interaction between Co3O4 and CNTs modified with polyethylenimine (PEI) helps to improve the gas sensing performance. In particular, the CNT-Co3O4 composite synthesized at 190°C shows the outstanding sensitive characteristics to H2 with a lower detection limit of 30 ppm at room temperature. The obtained CNT-Co3O4 sensor displays excellent selectivity and stability to H2. The energy band model of the conductive mechanism has been built to explain the resistance change when the gas sensor is exposed to the H2. Hence, the CNT-Co3O4 composite material presents highly promising applications in H2 gas sensing.

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http://hdl.handle.net/10453/166507