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 meas- ured by the average crystallite size (LC) inferred from Raman spectroscopy. Poor YC (<9gMWCNTs/gFe) and small LC (~15nm) are obtained, on average, in CVD experi- ments before optimisation. An outstanding improvement is achieved (YC≅51gMWCNTs/gFe and LC≅45nm) upon opti- mised conditions.

TAGUCHI-OPTIMISED PRODUCTION OF MWCNT-BASED NANOCOMPOSITES BY CATALYTIC ROUTE

PIPEROPOULOS, Elpida;MILONE, Candida
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 meas- ured by the average crystallite size (LC) inferred from Raman spectroscopy. Poor YC (<9gMWCNTs/gFe) and small LC (~15nm) are obtained, on average, in CVD experi- ments before optimisation. An outstanding improvement is achieved (YC≅51gMWCNTs/gFe and LC≅45nm) upon opti- mised conditions.
2012
9788880801245
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11570/2036593
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