文章基本信息

标题：Synthesis of SnO 2 nanowires forCO, CH 4 and CH 3 OH gases sensing
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作者：Khurram Shehzad ; Nazar Abbas Shah ; Muhammad Amin 等
期刊名称：International Journal of Distributed Sensor Networks
印刷版ISSN：1550-1329
电子版ISSN：1550-1477
出版年度：2018
卷号：14
期号：8
页码：1
DOI：10.1177/1550147718790750
出版社：Hindawi Publishing Corporation
摘要：Synthesis of one-dimensional nanostructures, such as nanowires, is of vigorous significance for achieving the desired properties and fabricating functional devices. In this work, we report the synthesis of tin oxide (SnO 2 ) nanowires on gold-catalyzed silicon substrate by carbothermal reduction process. SnO 2 nanowires were synthesized with SnO 2 and graphite powders as the source materials at atmospheric pressure and temperature of 900°C in the ambience of nitrogen (N 2 ) gas. First, the effect of source material ratio SnO 2 :C on growth of SnO 2 nanowires was studied. The structural, morphological and compositional properties of the samples were investigated by X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy. The scanning electron microscopy investigation reveals that uniform dense nanowires of SnO 2 (diameter ~127 nm and length ~40 µm) were synthesized with vapour–liquid–solid mechanism. Ultraviolet–visible spectra estimate that the optical band gap of the synthesized SnO 2 nanowires was 3.72 eV. Second, the gas sensing performance of synthesized SnO 2 nanowires was investigated by testing with carbon monoxide (CO), Methane (CH 4 ) and methanol (CH 3 OH) gases at different operating temperatures and concentrations. Results indicate that the synthesized SnO 2 nanowires are highly promising for gas sensing applications.
关键词：Nanowires; synthesis; sensing applications; optical band gap