Abstract
In this study, the floating catalyst method was adopted to synthesize carbon nanotubes (CNTs). High purity single walled and double walled carbon nanotubes were obtained by pyrolyzing the hydrocarbon gas in the temperature range of 1373 K and 1473 K. By proper selecting the parameter, a high product rate up to 70mg/10mins can be achieved. The high productivity implies that this method has the potential to further develope a mass production route for fabricating high quality CNTs. In this work, the effects of catalyst precursor, temperature, pressure, and promoter/hydrocarbon mole ratio on the synthesis of CNTs are discussed. Furthermore Field Emission Scanning Electron Microscopy (FESEM), High Resolution Transmission Electron Microscopy (HRTEM) and Micro-Raman system were used to examine the microstructure of the fabricated CNTs.