액상법에 의한 Carbon Nanofiber 제조 및 특성 분석
Preparation and Characterization of Carbon Nanofiber fromLiquid Phase Carbon Source
이원우(한국화학연구원); 신채호(충북대학교); 박한성(한국화학연구원); 최영민(한국화학연구원); 류병환(한국화학연구원)
18권 10호, 564~570쪽
초록
Nanostructured carbon materials have been found to have applications in fuel cell electrodes, field emitters, electronic devices, sensors and electromagnetic absorbers, etc. Especially, the CNF (carbon nanofiber) can be expected to play an important role in catalyst supporters for fuel cell electrodes and chemical reactions. In this study, we synthesized CNF from a liquid phase carbon source by a solvothermal method. In addition, we studied the parameters for the preparation of CNF by controlling heating and cooling rates, synthesis temperature and time. We characterized the CNF by SEM/TEM, XRD, Raman spectroscopy and EDS. We found that the heating and cooling rate have strong effects on the CNF formation and growth. We were able to prepare the best CNF at the heating rate of 10oC/min, at 450℃ for 60 minutes, and at the cooling rate of 4℃/min.As a result of Raman spectra, we found that the sample showed two characteristic Raman bands at ~1350cm-¹ (D band) and ~1600cm-¹ (G band). The G band indicates the original graphite feature, but the D band has been explained as a disorder feature of the carbon structure. The diameter and length of the CNF was about 15~20nm, and over 1mm, respectively.
Abstract
Nanostructured carbon materials have been found to have applications in fuel cell electrodes, field emitters, electronic devices, sensors and electromagnetic absorbers, etc. Especially, the CNF (carbon nanofiber) can be expected to play an important role in catalyst supporters for fuel cell electrodes and chemical reactions. In this study, we synthesized CNF from a liquid phase carbon source by a solvothermal method. In addition, we studied the parameters for the preparation of CNF by controlling heating and cooling rates, synthesis temperature and time. We characterized the CNF by SEM/TEM, XRD, Raman spectroscopy and EDS. We found that the heating and cooling rate have strong effects on the CNF formation and growth. We were able to prepare the best CNF at the heating rate of 10oC/min, at 450℃ for 60 minutes, and at the cooling rate of 4℃/min.As a result of Raman spectra, we found that the sample showed two characteristic Raman bands at ~1350cm-¹ (D band) and ~1600cm-¹ (G band). The G band indicates the original graphite feature, but the D band has been explained as a disorder feature of the carbon structure. The diameter and length of the CNF was about 15~20nm, and over 1mm, respectively.
- 발행기관:
- 한국재료학회
- 분류:
- 재료공학