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Issue 82, 2014
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Growth of SnO2 nanowire arrays by ultrasonic spray pyrolysis and their gas sensing performance

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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

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Publication details

The article was received on 13 jún. 2014, accepted on 12 ágú. 2014 and first published on 15 sep. 2014


Article type: Paper
DOI: 10.1039/C4RA05682E
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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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