Abstract
Preparation of carbon nanotubes (CNTs) by catalytic chemical vapor deposition (CCVD) was conducted using a nano-agglomerate bed of quartz with 44 mm inner diameter and 1000 mm height in the temperature range 500–650°C. Ethylene and propylene were used as carbon source materials, and four kinds of catalysts containing oxides of Fe, Cu, and Ni, prepared by co-precipitation method, were used. Effect of catalyst composition on morphology of CNTs was studied by transmission electron microscopy (TEM). It shows that better quality CNTs can be achieved with Fe-catalysts, and carbon nano-fibers were produced at high carbon yield with Ni-catalysts.
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