Synthesis of multi-walled C nanotubes by Fe-Ni (70 wt.%) catalyzed chemical vapor deposition from pre-heated CH4


Altay M. C. , Eroglu S.

MATERIALS LETTERS, cilt.67, ss.124-127, 2012 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 67 Konu: 1
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.matlet.2011.09.011
  • Dergi Adı: MATERIALS LETTERS
  • Sayfa Sayıları: ss.124-127

Özet

This study aims to investigate effect of pre-heating of pure CH4 on the growth of C nanotubes by chemical vapor deposition in the presence of Fe-Ni (70 wt.%) alloy catalyst. It was observed that un-preheated CH4 yielded no C formation at 1050-1150 K owing to its poor decomposition rate, contrary to the results of thermodynamic analysis. Whereas, pre-heating treatment of CH4 at 1200 K prior to the growth increased pyrolysis of the hydrocarbon which promoted synthesis of C nanotubes at 1050-1150 K, possibly due to enhanced formations of intermediate gaseous species. TEM study revealed that the morphologies of the products consist of multi-walled C nanotubes. (C) 2011 Elsevier B.V. All rights reserved.