Abstract:
Bamboo-like N-doped carbon nanotubes were prepared by catalytic pyrolysis method with melamine as raw material and FeCl
2·6H
2O as catalyst precursor. The effects of the reaction temperature and FeCl
2·6H
2O content on the phase composition and microstructure of the product were investigated. The results show that at the reaction temperatures of 650-800℃, the yield and length to diameter ratio of the carbon nanotubes first increased and then decreased with the increase of reaction temperature. The optimal reaction temperature was 750℃. When pyrolyzing at 750℃, the yield and length to diameter ratio of the carbon nanotubes first increased and then decreased with the increase of FeCl
2·6H
2O content and the optimal content was 0.50wt% of melamine. The obtained carbon nanotubes under this condition had diameters of 40-50 nm and lengths of 10-15
μm, the N-doping amount in the carbon nanotubes was about 3.42at%, in which the fraction of graphitic N was about 43.1mol%.