Preparation of Porous Tin Oxide Nanotubes Using Carbon Nanotubes as Templates and Their Gas-Sensing Properties

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• 作者：Yong Jia ; Lifang He ; Zheng Guo ; Xing Chen ; Fanli Meng ; Tao Luo ; Minqiang Li ; Jinhuai Liu
• 刊名：Journal of Physical Chemistry C
• 出版年：2009
• 出版时间：June 4, 2009
• 年：2009
• 卷：113
• 期：22
• 页码：9581-9587
• 全文大小：413K
• 年卷期：v.113,no.22(June 4, 2009)
• ISSN：1932-7455

文摘

Porous tin oxide (SnO₂) nanotubes were prepared by using multiwalled carbon nanotubes as templates. The morphology and crystal structure of the SnO₂ nanotubes were characterized by field emission scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. The SnO₂ crystallite size was about 5 to7 nm. The as-prepared porous SnO₂ nanotubes exhibited a good response and reversibility to some organic gas, such as ethanol and acetone. The sensor responses to 100 ppm ethanol and acetone were 130 and 126, respectively, at a working temperature of 200 °C. In addition, the sensors also exhibited a good response to methanol, propanol, 2-propanol, ethyl acetate, and ethyl ether. The relationship between the gas-sensing properties and the microstructure of the as-prepared SnO₂ nanotubes was also discussed.