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Fe-substituted mullite powders for the in situ synthesis of carbon nanotubes by catalytic chemical vapor deposition

De Resende, Valdirene Gonzaga and Hui, Xu and Laurent, Christophe and Weibel, Alice and De Grave, Eddy and Peigney, Alain Fe-substituted mullite powders for the in situ synthesis of carbon nanotubes by catalytic chemical vapor deposition. (2009) Journal of Physical Chemistry C, vol. 113 (n° 26). pp. 11239-11245. ISSN 1932-7447

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Official URL: http://dx.doi.org/10.1021/jp901780f

Abstract

Powders of iron-substituted mullite were prepared by combustion and further calcination in air at different temperatures. A detailed study involving notably Mo¨ssbauer spectroscopy showed that the Fe3+ ions are distributed between the mullite phase and a corundum phase that progressively dissolves into mullite upon the increase in calcination temperature. Carbon nanotube-Fe-mullite nanocomposites were prepared for the first time by a direct method involving a reduction of these powders in H2-CH4 and without any mechanical mixing step. The carbon nanotubes formed by the catalytic decomposition of CH4 on the smallest metal particles are mostly double-walled and multiwalled, although some carbon nanofibers are also observed.

Item Type:Article
Additional Information:Thanks to American Chemical Society editor. The definitive version is available at http://portal.acs.org/ The original PDF of the article can be found at Journal of Physical Chemistry C website : http://pubs.acs.org/doi/abs/10.1021/jp901780f
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Ghent University (BELGIUM)
Laboratory name:
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Deposited By:Nihad Lahdifi

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