The Preparation of Bamboo-Structured Carbon Nanotubes with the Controlled Porosity by CVD of Acetylene on Co-Mo/MCM-41

Bamboo-structured carbon nanotubes are grown on co-mo/mcm-41 catalyst in the temperature range of 873-973 k by thermal chemical vapor deposition of acetylene. this study shows that the purified carbon nanotubes have open tips and the metals of the catalyst are notencapsulated. thus, the bamboo-structure seems to grow from the base. pore size distribution of the product is quite narrow and is in the range of 2- 5 nm similar to the catalyst pore size distribution.the results of this study demonstrate that by manipulating the template, the pore size distribution of the final product may be controlled. the so-prepared carbon nanotubes with controlled porosity are better suited for the application in gas adsorption and catalyst synthesis