Influence of ethanol in the presence of H2 on the catalytic growth of vertically aligned carbon nanotubes

O. Guellati, I. Janowska, D. Bégin, C. Pham-Huu, M. Guerioune, Z. Mekhalif, J. Delhalle, S. Moldovan, O. Ersen

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    Résumé

    The vertically aligned multi-walled carbon nanotubes (VA-MWNTs) were synthesized by a catalytic chemical vapor deposition (CCVD) technique, using ferrocene as an iron catalyst precursor and toluene/ethanol mixture with different ratio as a carbon source/etching agent, in the presence of H . The growth rate, efficiency and the structure of the synthesized tubes were investigated. The CNTs growth rate and quality of tubes significantly improve up to 9 vol.% of ethanol whereas a negative influence was observed for higher ethanol concentration (>17 vol.%). Low ethanol content in the reaction mixture (5 vol.%) results in the highest volume density of the tubes within the array along with highest specific surface area. The synergetic effect of EtOH/hydrogen on the growth rate of VA-MWNTs was observed as well.
    langue originaleAnglais
    Pages (de - à)7-14
    Nombre de pages8
    journalApplied catalysis. A: General
    Volume423-424
    Les DOIs
    Etat de la publicationPublié - 7 mai 2012

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