Cordier, Anne and De Resende, Valdirene Gonzaga and De Grave, Eddy and Peigney, Alain and Laurent, Christophe CCVD Synthesis of Single- And Double-Walled Carbon Nanotubes: Influence of the Addition of Molybdenum to Fe-Al2O3 Self-Supported Foams. (2008) Journal of Physical Chemistry C, vol. 112 (n° 48). pp. 18825-18831. ISSN 1932-7447
(Document in English)
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Official URL: http://dx.doi.org/10.1021/jp806708z
Powders of R-Al1.8Fe0.2O3 solid solution are prepared by combustion and are attrition-milled with different amounts of ammonium heptamolybdate before being transformed into self-supported foams by impregnation of a polyurethane foam. Carbon nanotubes, mostly single- and double-walled, are prepared by catalytic chemical vapor deposition using the foams as catalytic materials. Extensive characterization reveals that the addition of a small amount of molybdenum first favors the formation of double-walled nanotubes over that of singlewalled nanotubes and second activates smaller nanoparticles, thus producing smaller-diameter nanotubes. A detailed Mo¨ssbauer spectroscopy study reveals that there is no interaction between iron- and molybdenum species, pointing to a role of molybdenum favoring some phenomenon happening in the gas phase, as opposed to any alloying effect.
|Additional Information:||Thanks to American Chemical Society editor. The definitive version is available at http://pubs.acs.org The original PDF of the article can be found at Journal of Physical Chemistry C website : http://pubs.acs.org/journal/jpccck|
|Audience (journal):||International peer-reviewed journal|
|Institution:||Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)|
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Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
|Deposited By:||Celine Cabaup|
|Deposited On:||02 Jun 2009 12:58|
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