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Effect of Alumina/Iron Catalysts on the Formation of Carbon Nanotubes

Xiaoxue Zhang, Juha-Pekka Nikkanen, Jyri Rintala, Mika Pettersson, Tomi Kanerva, Jarmo Laakso, Erkki Levänen, Tapio Mäntylä

Journal of Ceramic Science and Technology, Vol. 1, No. 1 (2010), pp. 51-54

DOI: 10.4416/JCST2010-00013

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Abstract

Two different ferrous compounds, iron nitrate and ferrocene, were applied as the iron precursor in sol-gel processing in order to produce two different iron-containing alumina catalysts. Methane gas was decomposed over the two catalysts under the same conditions to produce carbon nanotubes. Multi-walled carbon nanotubes were formed on the catalyst with iron nitrate, but not obtained on the catalyst produced with ferrocene. X-ray diffraction, transmission electron microscopy, field emission scanning electron microscopy, Raman spectroscopy and nitrogen adsorption/desorption characterization were performed to compare the catalysts and discuss the effect of the catalysts obtained with the different ferrous compounds on the formation of the multi-walled carbon nanotubes.

Keywords

carbon nanotubes, alumina, sol-gel method, chemical catalytic vapour deposition

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