Surfactant assisted solid-state synthesis and gas sensor application of a SWCNT/SnO2 nanocomposite material

被引:11
作者
Lu, Jun
Ma, Anson
Yang, Shihe
Ng, Ka Ming
机构
[1] Hong Kong Univ Sci & Technol, Dept Chem, Hong Kong, Hong Kong, Peoples R China
[2] Hong Kong Univ Sci & Technol, Dept Chem Engn, Hong Kong, Hong Kong, Peoples R China
关键词
single-walled carbon nanotubes; tin oxide nanoparticles; gas sensors; CNT nanocomposite materials; nitrogen dioxide;
D O I
10.1166/JNN.2007.342
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Although tin oxide has been the most widely investigated metal oxide material for gas detection, it suffers from the large resistance and high operating temperature. This could be overcome by hybridization with nanostructured carbon. In this work, tin oxide nanoparticles with ultrasmall sizes of 1-3 nm have been uniformly coated onto bundles of single-walled carbon nanotubes by a surfactant assisted solid state synthesis approach for the first time. Gas sensor properties of the as-synthesized nanocomposite material toward NO2 (from 5 to 60 ppm) are measured at 150 degrees C. Compared to the pure carbon tubes gas sensors, the nanocomposite gas sensor responds to NO2 in low concentrations with good linearity, high sensitivity, and fast recovery, while working at a relatively low temperature.
引用
收藏
页码:1589 / 1595
页数:7
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