PRODUCTION METHOD OF CARBON NANOTUBES USING MECHANICALLY AND CHEMICALLY TREATED CATALYST

摘要

PURPOSE: Provided is a production method of carbon nanotubes with chemical stabilization and homogeneous quality by catalyst enhanced chemical vapor deposition using a transition metal/porous carrier, catalyst, treated by mechanical and chemical process. CONSTITUTION: The production method of carbon nanotubes comprises the steps of: (i) milling a transition metal/porous carrier, catalyst, in a rate of 600-800rpm for 30-120min, wherein the catalyst with a shape of sphere(100-200nm) is prepared by stirring transition metal compound such as ferrous nitrate(Fe(NO3)3·9H2O), nickel nitrate(Ni(NO3)2·6H2O) or cobalt nitrate(Co(NO3)2·6H2O) and porous carrier such as aluminum hydroxide, silicon hydroxide or graphite in organic solvent such as ethanol strongly to get suspension, and then drying; (ii) reducing the milled catalyst with H2; supplying hydrocarbon gas such as acetylene, ethylene, methane, propane, etc. to the reduced catalyst at 400-900deg.C for growing carbon nanotube on the catalyst; (iii) cooling the nanotube in Ar atmosphere. The resultant carbon nanotubes, having 20-30nm of diameter and chemically stabilized structure, are used as carrier of fuel cells and emitter for display.