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

다국어 초록 (Multilingual Abstract)

Multiwall carbon nanotubes are synthesized by using VLS mechanism for the application to H₂ 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 TiO₂ 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 H₂ concentration of 100–5000ppm at room temperature. These sensitivities are significantly improved to 6.64–46.65% by coating TiO₂ nanoparticles to the MWCNT sensor. The mechanisms of H2 gas sensing improvement of the MWCNT sensor coated with TiO₂ nanoparticles are discussed.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 실험방법
• 3. 결과 및 고찰
• 4. 결론
• References