Aligned carbon nanofiber bundles were synthesized by thermal chemical vapor deposition method at high temperature in a vertical reactor vessel. The as-synthesized bundles were with a length up to several millimeters for 6 hours growth and they were so closely assembled to form a solid piece. Thermal gravimetric analysis results showed that the product possessed a high purity of carbon, c.a. 95% in weight percentage.
Several kinds of multi-wall carbon nanotubes (MWNTs) with different morphology were synthesized using catalytic decomposition of hydrocarbons over different metal catalysts.The products were characterized by TEM, HREM and SEM. Hydrogen adsorption properties of the MWNTs were investigated by volumetric measurement at room temperature under a modest pressure(6—7 MPa).The results indicate that both the structure of the MWNTs and the metal catalysts will affect the hydrogen adsorption capacity of the sample...
