Journal
DIAMOND AND RELATED MATERIALS
Volume 20, Issue 10, Pages 1353-1356Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.diamond.2011.08.013
Keywords
Carbon nanotubes; Nitrogen-doped carbon nanotubes; Catalyst
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Funding
- National Natural Science Foundation of China [50730003, 50672025, 20806024, 51002051]
- Research Fund of China 863 program [2008AA062302]
- Shanghai Leading Academic Discipline Project [B502]
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Nitrogen-doped carbon (CN(x)) nanotubes were synthesized with carbon nanotubes (CNTs) as catalyst by detonation-assisted chemical vapor deposition. CN(x) nanotubes exhibited compartmentalized bamboo-like structure. Electron energy loss spectroscopy and elemental mapping studies indicated that the synthesized tubes contained high concentration of nitrogen (ca. 17.3 at.%). inhomogeneously distributed with an enrichment of nitrogen within the compartments. X-ray photoelectron spectroscopy analysis revealed the presence of pyridine-like N and graphitic N incorporated into the graphitic network. The catalytic activity of CNTs for CN(x) nanotube growth was ascribed to the nanocurvature and opening edges of CNT tips, which adsorbed C(n)/CN species and assembled them into CN(x) nanotubes. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.
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