Influence of gas-mixture composition on yield, purity and morphology of carbon nanotubes grown by catalytic isobutane-decomposition (Articolo in rivista)

Type
Label
  • Influence of gas-mixture composition on yield, purity and morphology of carbon nanotubes grown by catalytic isobutane-decomposition (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Alternative label
  • M.G. Donato; G. Faggio; S. Galvagno; M. Lanza; G. Messina; C. Milone; E. Piperopoulos; A. Pistone; S. Santangelo (2009)
    Influence of gas-mixture composition on yield, purity and morphology of carbon nanotubes grown by catalytic isobutane-decomposition
    in Diamond and related materials
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • M.G. Donato; G. Faggio; S. Galvagno; M. Lanza; G. Messina; C. Milone; E. Piperopoulos; A. Pistone; S. Santangelo (literal)
Pagina inizio
  • 360 (literal)
Pagina fine
  • 363 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 18 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR, Ist. per i Processi Chimico-Fisici Sez. Messina, 98123 Messina, Italy Dip. di Meccanica e Materiali, Università \"Mediterranea\", 89060 Reggio Calabria, Italy Dip. di Chimica Industriale e Ingegneria dei Materiali, Università di Messina, 98166 Messina, Italy (literal)
Titolo
  • Influence of gas-mixture composition on yield, purity and morphology of carbon nanotubes grown by catalytic isobutane-decomposition (literal)
Abstract
  • Present work concerns iron-catalyzed growth of multi-walled C nanotubes (MWCNTs) by decomposition of isobutane (C4H10). MWCNTs are prepared, by chemical vapor deposition (CVD) at 600 °C, in C4H10-H2-He atmosphere over 29 wt.%Fe/Al2O3 catalysts. After purification, reaction products are analyzed by scanning electron microscopy (SEM), Raman spectroscopy (RS) and thermo-gravimetric analysis (TGA). The influence of the gas-mixture composition on the reaction issue is investigated by considering different gas-flowing setups: H2 or C4H10 flow is varied in the range 15-90 cc/min while keeping hydrocarbon or H2 constant. The total flow is kept at 120 cc/min by using He as a balance-gas. Owing to these changes, diverse selectivity towards nanotubes, morphologies, size distributions, purity degrees and crystallinity are obtained, as evidenced by the characterization results. (literal)
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