화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.18, No.2, 208-214, March, 2001
DOI10.1007/BF02698461  Export Citation
Effects of Bimetallic Catalyst Composition and Growth Parameters on the Growth Density and Diameter of Carbon Nanotubes
A. K.M. Fazle Kibria, Young Hwan Mo, Min Hee Yun1, Moon J. Kim2, and Kee Suk Nahm†
  • School of Chemical Engineering and Technology, Chonbuk National University, Chonju 561-756, Korea
  • 1Jet Propulsion Laboratory, California Institute of Technology-NASA, Pasadena, AC 91107, USA
  • 2Center for Solid State Science, Arizona State University, Tempe, Arizona 85287-1704, USA
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Multi-wall carbon nanotubes (MWNTs) were synthesized by catalytic decomposition of acetylene over Fe, Ni and Fe-Ni bimetallic catalysts supported on alumina under various controlled conditions. The growth density and diameter of CNTs were markedly dependent on the activation time of catalysts in H2 atmosphere, reaction time, reaction temperature, flow rate of acetylene, and catalyst composition. Bimetallic catalysts were apt to produce narrower diameter of CNTs than single metal catalysts. For the growth of CNTs at 600℃ under 10/100 sccm flow of C2H2/H2 mixture, the narrowest diameter about 20 nm was observed at the reaction time of 1 h for 20Fe : 20Ni : 60Al2O3 catalyst, but at that of 1.5 h for 10Fe : 30Ni : 60Al2O3 catalyst. It was considered that the diameter and density of CNTs decreased with the increase of the growth time mainly due to hydrogen etching. The growth of CNTs followed the tip growth mode.
Keywords:Carbon Nanotubes;Fe-Ni/Al2O3 Catalyst;CVD;Acetylene;Growth Density
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