Applied Science and Convergence Technology

The Korean Vacuum Society (한국진공학회)
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H2S Gas Sensing Properties of CuO Nanotubes

  • Kang, Wooseung (Department of Metallurgical & Materials Engineering, Inha Technical College) ;
  • Park, Sunghoon (Department of Materials Science & Engineering, Inha University)
  • Received : 2014.11.11
  • Accepted : 2014.11.26
  • Published : 2014.11.30
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Abstract

CuO nanotubes are synthesized using $TeO_2$ nanorod templates for application to $H_2S$ gas sensors. $TeO_2$ nanorod templates were synthesized by using the VS method through thermal evaporation. Scanning electron microscopy, transmission electron microscopy and X-ray diffraction showed that the synthesized nanotubes were monoclinic-structured polycrystalline CuO with diameter and wall thickness of approximately 100~300 nm and 5~10 nm, respectively. The CuO nanotube sensor showed responses of 136~325% for the $H_2S$ concentration of 0.1~5 ppm at room temperature. These response values are approximately twice as high as that of the CuO nanowire sensor for the same concentrations of $H_2S$ gas. Along with the investigation of the performance of the sensors, the mechanisms of $H_2S$ gas sensing of the CuO nanotubes are also discussed in this study.

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References

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