Microwave synthesis of nitrogen-doped carbon nanotubes anchored on graphene substrates

We report a fast and facile microwave technique to synthesize nitrogen-doped carbon nanotubes anchored on graphene substrates from azobis(cyclohexanecarbonitrile), a commodity chemical, commonly used as a radical initiator in polymerization reactions as the nanotube precursor. Micrometer-long, nitro...

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Bibliographic Details
Published in:Carbon (New York) 2015-06, Vol.87, p.186-192
Main Authors: Sridhar, Vadahanambi, Lee, Inwon, Chun, Ho-Hwan, Park, Hyun
Format: Article
Language:English
Subjects:
Carbon
Carbon nanotubes
Commodities
Graphene
Microwaves
Nanostructure
Networks
Polymerization
Three dimensional
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Summary:We report a fast and facile microwave technique to synthesize nitrogen-doped carbon nanotubes anchored on graphene substrates from azobis(cyclohexanecarbonitrile), a commodity chemical, commonly used as a radical initiator in polymerization reactions as the nanotube precursor. Micrometer-long, nitrogen-doped carbon nanotubes vertically anchored on graphene was obtained to produce mesoporous, hierarchical nanostructures. X-ray photoelectron spectroscopy reveals that nitrogen moieties exist as pyridinic and graphitic nitrogen. When applied as anodes in lithium-ion batteries, our materials exhibit a high capacity of 1342mAhg−1 even after prolonged cycling reflecting the ability of the three-dimensional network to accommodate the extreme volume changes occurring during the lithiation/delithiation reactions.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2015.01.063