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Nitrogen Doped Carbon Nanotubes from Organometallic Compounds: A Review

DST/NRF Centre of Excellence in Strong Materials and Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag 3, Johannesburg 2050, South Africa
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Materials 2010, 3(3), 2141-2171; https://doi.org/10.3390/ma3032141
Received: 11 February 2010 / Revised: 1 March 2010 / Accepted: 15 March 2010 / Published: 22 March 2010
(This article belongs to the Special Issue Organometallic Compounds)
Nitrogen doped carbon nanotubes (N-CNTs) have become a topic of increased importance in the study of carbonaceous materials. This arises from the physical and chemical properties that are created when N is embedded in a CNT. These properties include modified chemical reactivity and modified conductivity and mechanical properties. A range of methodologies have been devised to synthesize N-CNTs. One of the procedures uses a floating catalyst in which an organometallic complex is decomposed in the gas phase in the presence of a nitrogen containing reactant to give N-CNTs. Most studies have been limited to ferrocene, ring substituted ferrocene and Fe(CO)5. This review covers the synthesis (and properties) of N-CNTs and other shaped carbon nanomaterials (SCNMs) produced using organometallic complexes. It summarizes the effects that physical parameters such as temperature, pressure, gas flow rates, type and concentration of N source etc. have on the N-CNT type, size and yields as well as the nitrogen content incorporated into the tubes that are produced from organometallic complexes. Proposed growth models for N-CNT synthesis are also reported. View Full-Text
Keywords: nitrogen doped carbon nanotubes; shaped carbon nanomaterials; bamboo compartments; organometallic complexes; ferrocene; heteroatoms nitrogen doped carbon nanotubes; shaped carbon nanomaterials; bamboo compartments; organometallic complexes; ferrocene; heteroatoms
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Nxumalo, E.N.; Coville, N.J. Nitrogen Doped Carbon Nanotubes from Organometallic Compounds: A Review. Materials 2010, 3, 2141-2171.

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