Abstract Submitted to the    NANOTUBE'04 Conference:

Carbon nanotubes were synthesized by the fluidized-bed CVD synthesis of methane on a nanoporous magnesium oxide (MgO) impregnated with a cobalt nitrate (Co (NO3) 3·6H2O) and ((NH4) 6Mo7O24.4H2O) solution. Large quantities of nanotubes can be produced by this technique due to the high specific surface area (210m2·g-1) of the nanoporous MgO and the good convection in the fluidized bed. Different synthesis parameters such as the Co-Mo content in the MgO (2–10%), the synthesis temperature (800–1000 o C) and the synthesis time (5–40 min.) were investigated. TEM, SEM, TGA, X-ray diffraction, Raman spectroscopy and BET characterized the synthesized material. The purified samples consist of high carbon nanotube yield (100%) and quality. The results shown that the fluidized-bed CVD synthesis of carbon nanotubes on Co-Mo/MgO is very well suited to produce large quantities.