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Investigation of Fe/MgO Catalyst Support Precursors for the Chemical Vapour Deposition Growth of Carbon Nanotubes

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Carbon nanotubes have been grown by the catalytic chemical vapour deposition (CCVD) method using an Fe catalyst supported on MgO. The influence of using either pure MgO or Mg(NO3)2 · 6H2O as the source of the MgO catalyst support as well as the effects of varying the Fe metal loading on the support has been investigated. The catalyst was prepared at room temperature by the wet impregnation method from a mixture of Fe2(SO4)3 · xH2O and either MgO or Mg(NO3)2 · 6H2O in aqueous solution; the weight percent of Fe/MgO was varied between 5, 10, and 15. Preparation of CNTs was carried out in a horizontal furnace at 900 °C under methane gas with flow rate of 6 litres/min. The supported catalysts and carbon nanotubes (CNTs) were investigated by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray Diffraction pattern (XRD) and Fourier Transform (FT)-Raman spectroscopy. Results revealed that the number of nanotubes was maximised by using MgO as a support precursor instead of Mg(NO3)2 · 6H2O and also by increasing the amount of Fe.
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Keywords: CARBON NANOTUBES; CATALYST; CHEMICAL VAPOUR DEPOSITION; SUPPORT

Document Type: Research Article

Publication date: 01 June 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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