Ultra-sensitive glycol sensing performance with rapid-recovery based on heterostructured ZnO-SnO2 hollow nanotube

•The n-n heterostructured ZnO–SnO2 hollow nanotube was prepared successfully via simple electrospinning technology.•The nanotube exhibits optimal sensing performance toward glycol even at low concentration.•Excellent properties attribute to the n-n heterojunction and porous structure.•The sensing me...

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Bibliographic Details
Published in:Materials letters 2020-08, Vol.273, p.127967, Article 127967
Main Authors: Xu, X.H., Ma, S.Y., Xu, X.L., Han, T., Pei, S.T., Tie, Y., Cao, P.F., Liu, W.W., Wang, B.J., Zhang, R., Zhang, J.L.
Format: Article
Language:English
Subjects:
Electrospinning
Gas sensors
Glycol
Heterostructures
Materials science
Nanotubes
Porosity
Recovery time
Semiconductors
Sensors
Tin dioxide
Zinc oxide
ZnO-SnO2 hollow nanotubes
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Summary:•The n-n heterostructured ZnO–SnO2 hollow nanotube was prepared successfully via simple electrospinning technology.•The nanotube exhibits optimal sensing performance toward glycol even at low concentration.•Excellent properties attribute to the n-n heterojunction and porous structure.•The sensing mechanism and selectivity are discussed in detail. In this work, we successfully synthesized heterostructured ZnO-SnO2 composite nanotubes for high performance glycol gas sensor combined with certain calcination treatment. The as-prepared sample was characterized by various technologies. The sensor based on this hybrid nanotube displayed high response (47.71) toward 150 ppm glycol at 210 °C with response/recovery time of approximately 55 and 13 s respectively, even to 5 ppm glycol with a response of about 2.16. It also showed excellent repeatability and long-term stability. These good sensing properties are mainly attributed to the ZnO-SnO2 hollow heterostructure which possesses a large surface area and porosity. Besides, the sensing mechanism was elaborated at length.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2020.127967