OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

CCVD Synthesis of Single- And Double-Walled Carbon Nanotubes: Influence of the Addition of Molybdenum to Fe-Al2O3 Self-Supported Foams

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

[img] (Document in English)

PDF (Author's version) - Depositor and staff only - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
1MB

Official URL: http://dx.doi.org/10.1021/jp806708z

Abstract

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.

Item Type:Article
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
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > Ghent University (BELGIUM)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
Statistics:download
Deposited By: Celine Cabaup
Deposited On:02 Jun 2009 12:58

Repository Staff Only: item control page