Journal of Surface Science and Engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Ethanol Gas Sensing Properties of NiO-based Composite Oxide Semiconductor with Co3O4 Nanoparticles

산화코발트 나노입자의 첨가에 따른 산화니켈 기반 반도체 산화물의 에탄올 가스 검출 특성 향상

  • Kang, Wooseung (Department of Metallurgical & Materials Engineering, Inha Technical College)
  • 강우승 (인하공업전문대학 금속재료과)
  • Received : 2016.08.16
  • Accepted : 2016.08.30
  • Published : 2016.08.31
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Abstract

NiO nanoparticles were synthesized by hydrothermal method for the application to ethanol gas sensor. They were composited with $Co_3O_4$ nanoparticles to improve the sensitivity to ethanol gas. Scanning electron microscopy revealed that the synthesized NiO nanoparticles were plate-shaped with the approximate size and thickness of 60 - 120 nm and 20 nm, respectively. On the other hand, $Co_3O_4$ nanoparticles mixed with NiO was observed to be spherical with the size range of 30 - 50 nm. The sensitivities of NiO sensors composited with $Co_3O_4$ nanoparticles at an optimal ratio of 8 : 2 were enhanced to approximately 1.44 - 1.79 times as high as those of as-synthesized NiO sensors for the ethanol concentration of 10 - 200 ppm at $200^{\circ}C$. The mechanism of the improved ethanol gas sensing of the NiO sensors composited with $Co_3O_4$ nanoparticles was discussed.

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References

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