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Home / Science of Advanced Materials, Volume 3, Number 5

Nanostructured Tin-Doped Indium Oxide for CO Sensing

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Author: Kale, Girish M.

Source: Science of Advanced Materials, Volume 3, Number 5, October 2011, pp. 879-885(7)

Publisher: American Scientific Publishers

DOI: https://doi.org/10.1166/sam.2011.1212

Hydrothermally synthesised nanostructured tin-doped indium oxide (ITO) has been employed as a sensing material for the detection of CO gas in a mixed potential sensor. Scandia stabilized zirconia (ScSZ) has been used as a solid-state oxide ion conducting membrane for sensing different CO concentrations from ∼100 ppm to ∼500 ppm. Monodispersed ITO particles with spherical shape have been obtained by hydrothermally treating the mixture of the coprecipitated gels with urea as an additive. Directly using urea as the mineralizer, the two coexisting morphologies such as rodlike and spherical shapes have been obtained. The sensor coupling spherical 5 at.% tin-doped indium oxide (5ITO) electrode shows the better sensitivity than the sensors coupling both spherical 8 at.% tin-doped indium oxide (S8ITO) and 8 at.% tin-doped indium oxide (RS8ITO) containing spherical and rod-like coexisting particle morphologies. The sensor coupling spherical 5 at.% tindoped indium oxide (5ITO) electrode also exhibits highly reproducible and stable signals to different CO concentrations.

Keywords: CO SENSOR; HYDROTHERMAL SYNTHESIS; MIXED POTENTIAL; NANOSTRUCTURED; SCANDIUM OXIDE STABILIZED ZIRCONIA; SOLID ELECTROLYTE; TIN-DOPED INDIUM OXIDE

Document Type: Research Article

Publication date: 01 October 2011

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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