Abstract: Bamboo-like nanotubes with a diameter of 20～40 nm were prepared by thermal decomposition of pyridine at 700～800 ℃. EDX and XPS measurements show that they are nitrogen-doped carbon nanotubes. It was found that the intensity of the D band in the Raman spectrum of the N-doped tubes is much higher than that of undoped tubes. It was also found by TGA that the doped tubes were oxidized at much lower temperature. These both indicate that nitrogen-doping introduces defects into the graphite sheets of the tubes. HRTEM result is in good agreement with this.

Key words: Pyridine, CVD, Nitrogen-doped, Bamboo-like carbon nanotubes