Parameters Affecting the Structure and Yield of Carbon Nanotubes in CVD Method
Carbon nanotubes and nanofibers were synthesized at 400-800°C by a typical CVD method using SiO2, Al2O3, or MgO supported Ni or Co catalyst, and acetylene as feedstock. The effects of temperature, substrates and catalyst on the yield and structure of carbon nanotubes and nanofibers were investigated in detail. The experimental results showed that Ni based catalysts tended to form carbon nanofibers with “herringbone” structure, though for Ni/Al2O3 catalyst, the products at 800°C changed to a structure like carbon nanotube. Co based catalysts tended to form carbon nanotubes.
Hyungsun Kim, Junichi Hojo and Soo Wohn Lee
G. B. Zheng et al., "Parameters Affecting the Structure and Yield of Carbon Nanotubes in CVD Method", Materials Science Forum, Vols. 544-545, pp. 773-776, 2007