Direct synthesis and structural analysis of nitrogen-doped carbon nanofibers.
Carbon nanofibers containing a range of nitrogen contents of 1-10 atom % were directly synthesized by catalytic chemical vapor deposition over nickel-based catalysts at 350-600 degrees C using acetonitrile and acrylonitrile. The nitrogen content was controlled by careful choice of the reaction conditions. The N-doped carbon nanofibers showed herringbone structure with 20-60 nm diameter. X-ray photoelectron spectroscopy was applied to examine the chemical state of nitrogen in carbon nanofibers. Structural features of N-doped carbon nanofibers were examined in X-ray diffraction and electron microscopy. The mechanism for nitrogen including the structure of carbon nanofibers through the catalysis was discussed on the basis of the results.
Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka 816-8580, Japan. sylim@kier.re.kr
Seongyop
S
Lim
Seong-Ho
SH
Yoon
Isao
I
Mochida
Doo-Hwan
DH
Jung