| 학회 | 한국재료학회 |
| 학술대회 | 2017년 가을 (11/15 ~ 11/17, 경주 현대호텔) |
| 권호 | 23권 2호 |
| 발표분야 | E. 환경/센서 재료 분과 |
| 제목 | UV assisted facile Pd decorated MWCNT by MPECVD for hydrogen sensor. |
| 초록 | Hydrogen is one of the most powerful and environment friendly energy source with a high heat of combustion (142 kJ/g), low minimum ignition energy (0.017 mJ), wide flammable range (4–75%) and high burning velocity. However, hydrogen is explosive at concentrations over than 4% in air and is very dangerous at high concentration. As hydrogen has no color, smell and taste, it is difficult to detect hydrogen gas leak by the human sense and ensuring safety requires a hydrogen gas sensor. One of the most important properties for gas sensor application is high aspect ratio and excellent chemical and environmental stability. Since the carbon nanotubes (CNTs) have a high surface area with 1D structure, the reaction area of the hydrogen gas can be widen and thus CNTs are the highly probable candidate for hydrogen gas sensor In this work, palladium nanoparticles decorated multiwalled carbon nanotubes (MWCNTs) were fabricated for hydrogen sensing application. MWCNTs were deposited on p-type Si substrate using microwave plasma enhanced chemical vapor deposition (MPECVD). Pd nanoparticles were decorated on MWCNTs using simple UV assisted photochemical method. UV assisted method showed quick and uniform deposition of Pd nanoparticles and using minimal amount of Pd with inexpensive equipment. The fabricated CNTs showed multiwalled one with aligned structure. The defect of MWCNTs were reduced with Pd nanoparticles decorations. The Pd-MWCNT hydrogen sensor showed good response and stability with high concentration hydrogen gas (6 - 80%) in room temperature condition. |
| 저자 | Il-Han Yoo, Shankara S. Kalanur, Hyungtak Seo |
| 소속 | Department of Energy Systems Research and Department of Materials Science & Engineering |
| 키워드 | <P>Hydrogen sensor; Pd-MWCNT; MPECVD</P> |
