Multi-walled nanotubes are grown by chemical vapor deposition (CVD) in ethane+hydrogen mixture over 20þ/SiO2 catalyst, and the influence of ethane and hydrogen space velocities on carbon yield and crystalline quality of the reaction products is systematically investigated. It is found that higher carbon yields are paid with loss of selectivity and consequent worsening of the phase purity of the carbonaceous deposits. The most satisfactory results are achieved by inletting into the reactor a gas mixture, composed by 50% ethane + 50% hydrogen, at ∼45 min-1 space velocity.
Yield and quality optimization for MWNT prepared by catalytic CVD / Donato, M. G.; Galvagno, S.; Messina, Giacomo; Milone, C.; Pistone, A.; Santangelo, Saveria. - (2007), pp. 1023-1024. (Intervento presentato al convegno 28th International Conference on the Physics of Semiconductors, ICPS 2006 tenutosi a Vienna nel 24 July 2006 through 28 July 2006) [10.1063/1.2730244].
Yield and quality optimization for MWNT prepared by catalytic CVD
MESSINA, Giacomo;SANTANGELO, Saveria
2007-01-01
Abstract
Multi-walled nanotubes are grown by chemical vapor deposition (CVD) in ethane+hydrogen mixture over 20þ/SiO2 catalyst, and the influence of ethane and hydrogen space velocities on carbon yield and crystalline quality of the reaction products is systematically investigated. It is found that higher carbon yields are paid with loss of selectivity and consequent worsening of the phase purity of the carbonaceous deposits. The most satisfactory results are achieved by inletting into the reactor a gas mixture, composed by 50% ethane + 50% hydrogen, at ∼45 min-1 space velocity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
