Synthesis of SnO₂ nanorods and application to H₂ sensor

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• 作者：Yanbai Shen ; Xianmin Cao ; Baoqing Zhang ; Dezhou Wei ; Jiawei Ma ; Wengang Liu ; Cong Han ; Yantao Shen
• 关键词：SnO2 ; Nanorods ; Thermal evaporation ; Gas sensor ; H2
• 刊名：Journal of Alloys and Compounds
• 出版年：25 April, 2014
• 年：2014
• 卷：593
• 期：Complete
• 页码：271-274
• 全文大小：1020 K

文摘

SnO₂ nanorods were synthesized on oxidized silicon substrates by thermal evaporation of tin grains at 900 掳C in argon-oxygen flow and then investigated for their H₂ sensing properties. X-ray diffraction shows that SnO₂ nanorods have a tetragonal structure. Scanning electron microscopy demonstrates that SnO₂ nanorods are about 30 nm in diameter and several tens to several hundreds nanometers in length. X-ray photoelectron spectroscopy confirmed that the obtained SnO₂ nanorods are composed of pure SnO₂. H₂ sensing measurements indicate that SnO₂ nanorod gas sensor obtains the highest response of 6.54 to 3000 ppm H₂ at a relatively low operating temperature of 200 掳C and shows reversible response to H₂ at various operating temperatures and H₂ concentrations.