Synthesis of carbon nanotubes and related nanoparticles by submerged arc discharge

摘要

Single-wall carbon nanotubes(SWNTs),multi-wall carbon nanotubes(MWNTs),single-wall carbon nanohorns(SWNHs),multi-shelled nanoparticles and their metal-hybridized forms can be synthesized by a simple technique using arc discharge submerged in liquid.This technique is considered to be a very economical way as it does not require expensive components such as vacuum systems nor laser source.MWNTs and multi-shelled nanoparticles can be produced simply by arc discharge generated between graphite electrodes in water.In order to produce high yield of single-wall structures such as SWNTs and SWNHs,the gas environment at the arc plasma zone should be relatively inert.To achieve mis reaction system,liquid nitrogen can be used as the liquid media.Alternatively,a modified method,which uses arc-in-water system with gas injection,can be employed to synthesize SWNTs and SWNHs.The arc current also is an important factor to determine the structures of the products.