Comparative Study on Effect of Iron Oxide Doped Alumina-Based Catalysts via Sol-Gel and LFS Methods on CNTs Growth by Methane Decomposition

By using the sol-gel technique and the liquidspray method (LFS), three different iron oxide doped alumina-based catalyst s (Catalysts A, B and C) were prepared by using iron nitrate and ferrocene as the iron source. Multiwalled carbon nanotubes were obtained by a decomposition of methane gas over Catalysts A and C, but not over Catalyst B. X-ray diffraction, transmission electron microscopy and the nitrogen adsorption /desorption test were used to compare the three different catalysts and discuss the inuence of th e different catalysts on the formation of the multiwalled carbon nanotubes.

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