한국표면공학회지 (Journal of the Korean institute of surface engineering)

  • 제48권6호
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  • Pages.309-314
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  • 2015
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  • 1225-8024(pISSN)
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  • 2288-8403(eISSN)
한국표면공학회 (The Korean Institute of Surface Engineering)
권호 표지
DOI QR코드

DOI QR Code

TiO2 나노입자가 코팅된 다중 벽 탄소 나노튜브의 상온에서의 수소 가스 검출 특성

Hydrogen Sensing Properties of Multiwall Carbon Nanotubes Decorated with TiO2 Nanoparticles at Room Temperature

  • 박성훈 (인하대학교 신소재공학과) ;
  • 강우승 (인하공업전문대학 금속재료과)
  • Park, Sunghoon (Department of Materials Science & Engineering, Inha University) ;
  • Kang, Wooseung (Department of Metallurgical & Materials Engineering, Inha Technical College)
  • 투고 : 2015.12.08
  • 심사 : 2015.12.22
  • 발행 : 2015.12.31
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초록

Multiwall carbon nanotubes are synthesized by using VLS mechanism for the application to $H_2$ gas sensor. MWCNT is not suitable for hydrogen gas sensor due to its low response to the gas. To enhance the gas sensing performance, multiwall carbon nanotubes are coated with $TiO_2$ nanoparticles. Scanning electron microscopy and Transmission electron microscopy showed that the synthesized MWCNT were well dispersed with the diameter and wall thickness of approximately 10-30nm and 5nm, respectively. The MWCNT sensor showed the sensitivities of 1.33-9.5% for the $H_2$ concentration of 100-5000ppm at room temperature. These sensitivities are significantly improved to 6.64-46.65% by coating $TiO_2$ nanoparticles to the MWCNT sensor. The mechanisms of $H_2$ gas sensing improvement of the MWCNT sensor coated with $TiO_2$ nanoparticles are discussed.

키워드

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