Issue 82, 2014

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.

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

Supplementary files

Article information

Article type
Paper
Submitted
13 Jun 2014
Accepted
12 Aug 2014
First published
15 Sep 2014

RSC Adv., 2014,4, 43429-43435

Author version available

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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