Growth of SnO2 nanowire arrays by ultrasonic spray pyrolysis and their gas sensing performance

Jianbo Sun; Peng Sun; Dalin Zhang; Jing Xu; Xishuang Liang; Fengmin Liu; Geyu Lu

doi:10.1039/c4ra05682e

Growth of SnO₂ nanowire arrays by ultrasonic spray pyrolysis and their gas sensing performance

Jianbo Sun, Peng Sun, Dalin Zhang, Jing Xu, Xishuang Liang, Fengmin Liu^*, Geyu Lu

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

39 Citations (Scopus)

Abstract

The direct synthesis of tin dioxide (SnO₂) nanowire arrays on a glass substrate by using an ultrasonic spray pyrolysis method combined with sintering is demonstrated. The products obtained are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy (TEM) and high-resolution TEM. The results show that the SnO₂ nanowire arrays consist of single crystalline nanowires, each with a diameter of 50-70 nm and a length of 5-7 μm. There are two different nanowire growth directions because of the oxygen defect growth. The mechanism of the formation and growth of SnO₂ nanowire arrays was investigated. A platform gas sensor based on these arrays was fabricated. The sensor exhibits better sensitivity to and selectivity for NO₂ than do SnO₂ nanoparticles. The gas sensing mechanism is also discussed.

Original language	English
Journal	RSC Advances
Volume	4
Issue number	82
Pages (from-to)	43429-43435
Number of pages	7
ISSN	2046-2069
DOIs	https://doi.org/10.1039/c4ra05682e
Publication status	Published - 2014
Externally published	Yes

Bibliographical note

Publisher Copyright:
© the Partner Organisations 2014.

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Cite this

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title = "Growth of SnO2 nanowire arrays by ultrasonic spray pyrolysis and their gas sensing performance",

abstract = "The direct synthesis of tin dioxide (SnO2) nanowire arrays on a glass substrate by using an ultrasonic spray pyrolysis method combined with sintering is demonstrated. The products obtained are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy (TEM) and high-resolution TEM. The results show that the SnO2 nanowire arrays consist of single crystalline nanowires, each with a diameter of 50-70 nm and a length of 5-7 μm. There are two different nanowire growth directions because of the oxygen defect growth. The mechanism of the formation and growth of SnO2 nanowire arrays was investigated. A platform gas sensor based on these arrays was fabricated. The sensor exhibits better sensitivity to and selectivity for NO2 than do SnO2 nanoparticles. The gas sensing mechanism is also discussed.",

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AU - Sun, Jianbo

AU - Sun, Peng

AU - Zhang, Dalin

AU - Xu, Jing

AU - Liang, Xishuang

AU - Liu, Fengmin

AU - Lu, Geyu

PY - 2014

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AB - The direct synthesis of tin dioxide (SnO2) nanowire arrays on a glass substrate by using an ultrasonic spray pyrolysis method combined with sintering is demonstrated. The products obtained are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy (TEM) and high-resolution TEM. The results show that the SnO2 nanowire arrays consist of single crystalline nanowires, each with a diameter of 50-70 nm and a length of 5-7 μm. There are two different nanowire growth directions because of the oxygen defect growth. The mechanism of the formation and growth of SnO2 nanowire arrays was investigated. A platform gas sensor based on these arrays was fabricated. The sensor exhibits better sensitivity to and selectivity for NO2 than do SnO2 nanoparticles. The gas sensing mechanism is also discussed.

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