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,^a Peng Sun,^b Dalin Zhang,^b Jing Xu,^b Xishuang Liang,^b Fengmin Liu*^b and Geyu Lu*^b

* Corresponding authors

^a Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, P. R. China

^b State Key Laboratory on Integrated Optoelectronics Jilin University Region, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
E-mail: liufm@jlu.edu.cn, lugy@jlu.edu.cn
Fax: +86-431-85167808
Tel: +86-431-85167808

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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Article information

DOI: https://doi.org/10.1039/C4RA05682E
Article type: Paper
Submitted: 13 jún. 2014
Accepted: 12 ágú. 2014
First published: 15 sep. 2014

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RSC Adv., 2014,4, 43429-43435

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

J. Sun, P. Sun, D. Zhang, J. Xu, X. Liang, F. Liu and G. Lu, RSC Adv., 2014, 4, 43429 DOI: 10.1039/C4RA05682E

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