Carbon deposition on a catalyst surface during decomposition of different carbon-containing
compounds can be used for the synthesis of carbon nanotubes of graphitic structure.
Different supported transition metal oxides were found to be active in the production of these
nanotubes. The selectivity of the catalytic method is significantly higher than that of either the
arc discharge or the flame method. The experiments were carried out in a flow system, at
700° C, with various acetylene/nitrogen feeds. Deposited carbon was investigated by …