http://www.cnr.it/ontology/cnr/individuo/prodotto/ID180290
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
- 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)
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- 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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