Abstract
Multi-wall carbon nanotubes were produced by catalytic decomposition of acetylene. Co-Mo, Co-V and Co-Fe mixtures supported either on zeolite or corundum alumina were used as catalysts. When Fe or V is added to Co, the amount of carbon deposit increases. The nanotubes were characterized by both low and high resolution TEM. From histograms representing the outer diameter distributions, it is made clear that the outer diameter of the nanotubes can be controlled, choosing the appropriate catalyst.
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