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

*Kontaktforfatter

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

39 Citationer (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.

OriginalsprogEngelsk
TidsskriftRSC Advances
Vol/bind4
Udgave nummer82
Sider (fra-til)43429-43435
Antal sider7
ISSN2046-2069
DOI
StatusUdgivet - 2014
Udgivet eksterntJa

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© the Partner Organisations 2014.

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