Preparation and Quantitative Characterization of Nitrogen-Functionalized Multiwalled Carbon Nanotubes

Abstract

Abstract: Nitrogen-doped multiwalled carbon nanotubes (MWCNTs) were produced by catalytic chemical vapor deposition. The surface and structural properties were investigated by transmission electron microscopy, nitrogen physisorption, thermogravimetry-differential scanning calorimetry, temperature-programmed oxidation (TPO) and X-ray photoelectron spectroscopy. The surface of the purified sample contained 4.2% nitrogen atoms and comprised pyridine, lactam, pyridine oxide, pyridone and pyrrol functional components. TPO results reveal the combustion kinetics of each nitrogen-containing functional group. The nitrogen atoms are incorporated within the graphitic structure to give a basic surface, which will play an important role in the investigation of catalysis and energy conversion. A convenient route to a closed cup-like carbon nanostructure applicable to field emission devices is also reported.

Key words: functional group, nitrogen doping, carbon nanotube, X-ray photoelectron spectroscopy, temperature-programmed oxidation

CHEN Chun-Lin, ZHANG Jian, WANG Rui, SU Dang-Sheng, PENG Feng. Preparation and Quantitative Characterization of Nitrogen-Functionalized Multiwalled Carbon Nanotubes[J]. Chinese Journal of Catalysis, 2010, 31(8): 948-954.

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