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Metal―catalyst―free Growth and Characterization of Nitrogen―doped Carbon Nanotubes

Author(s): WANG Can, ZHAN Liang, HUANG Zhen-Hong, QIAO Wen-Ming, LIANG Xiao-Yi, YANG Jun-He, Ling Li-Cheng

Journal: Journal of Inorganic Materials
ISSN 1000-324X

Volume: 26;
Issue: 8;
Start page: 881;
Date: 2011;
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Keywords: carbon nanotubes; metal-catalyst-free; nitrogen-doped

Nitrogen―doped carbon (CNx) nanotbues were synthesized by detonation―assisted chemical vapor deposition with carbon nanotubes (CNTs) as catalysts and melamine as carbon/nitrogen sources. CNTs exhibit high catalytic activity for the metal―catalyst―free synthesis of CNx nanotubes. TEM, EDS, Mapping, XPS, Raman and TG were performed to characterize the synthesized CNx nanotubes. CNx nanotubes exhibit compartmentalized bamboo―like structure, and contain high concentration of nitrogen (ca. 17at%), which is homogeneously distributed within compartment layers and tube walls. The pyridine―like and graphitic N are incorporated into the graphitic network. The nitrogen doping induces the decrease of the graphitization degree and results in lower oxidation―resistance temperature. The synthesis of CNx nanotubes without metal catalysts will facilitate the applications of CNx nanotubes.
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