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: http://dx.doi.org/10.1166/jnn.2007.342

Publication date: 2007-04-01

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Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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