Surfactant Assisted Solid-State Synthesis and Gas Sensor Application of a SWCNT/SnO2 Nanocomposite Material

Authors: Lu, Jun; Ma, Anson; Yang, Shihe; Ng, Ka Ming

Source: Journal of Nanoscience and Nanotechnology, Volume 7, Numbers 4-5, April/May 2007 , pp. 1589-1595(7)

Publisher: American Scientific Publishers

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Abstract:

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 °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.

Keywords: SINGLE-WALLED CARBON NANOTUBES; TIN OXIDE NANOPARTICLES; GAS SENSORS; CNT NANOCOMPOSITE MATERIALS; NITROGEN DIOXIDE

Document Type: Research article

DOI: 10.1166/jnn.2007.342

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