The production of multi-walled C nanotubes (MWCNTs) and MWCNT-based nanohybrids by chemical vapour deposition (CVD) of isobutane is optimised by Taguchi’s robust design method. Processing conditions (calcination at 450–750°C and reduction at 500–700°C) and support material (Al2O3, MgO or Na+-K10) of the Fe-catalyst and synthesis temperature (500–700°C) are assumed to be factors controlling yield (YC) of the catalytic process and graphitisation degree of the grown MWCNTs, as measured by the average crystallite size (LC) inferred from Raman spectroscopy. Poor YC (<9gMWCNTs/gFe) and small LC (~15nm) are obtained, on average, in CVD experiments before optimisation. An outstanding improvement is achieved (YC=51gMWCNTs/gFe and LC=45nm) upon optimised conditions.
Taguchi-optimised production of MWCNT-based hybrid nanocomposites by catalytic route / Messina, Giacomo; E., Piperopoulos; M., Lanza; C., Milone; Faggio, Giuliana; Santangelo, Saveria. - (2012), pp. 82-85. (Intervento presentato al convegno CARBOMAT 2011 – Workshop on Carbon-based Low Dimensional Materials tenutosi a Catania, Italy nel 5-7 December 2011).
Taguchi-optimised production of MWCNT-based hybrid nanocomposites by catalytic route
MESSINA, Giacomo;FAGGIO, GIULIANA;SANTANGELO, Saveria
2012-01-01
Abstract
The production of multi-walled C nanotubes (MWCNTs) and MWCNT-based nanohybrids by chemical vapour deposition (CVD) of isobutane is optimised by Taguchi’s robust design method. Processing conditions (calcination at 450–750°C and reduction at 500–700°C) and support material (Al2O3, MgO or Na+-K10) of the Fe-catalyst and synthesis temperature (500–700°C) are assumed to be factors controlling yield (YC) of the catalytic process and graphitisation degree of the grown MWCNTs, as measured by the average crystallite size (LC) inferred from Raman spectroscopy. Poor YC (<9gMWCNTs/gFe) and small LC (~15nm) are obtained, on average, in CVD experiments before optimisation. An outstanding improvement is achieved (YC=51gMWCNTs/gFe and LC=45nm) upon optimised conditions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
