On the preparation of Ni-carboxylates catalysts for growing single walled carbon nanotubes

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Title:	On the preparation of Ni-carboxylates catalysts for growing single walled carbon nanotubes
Authors:	陳宗漢;Chen, Tsung-han;Chang, Shih-chin;林諭男;Lin, I-nan
Contributors:	淡江大學物理學系
Keywords:	Carbon nanotubes;Chemical vapor deposition;Metal-organic precursors
Date:	2005-03-01
Issue Date:	2009-12-31 10:10:39 (UTC+8)
Publisher:	Elsevier
Abstract:	A pretreatment process, which can convert the Ni-carboxylates into high performance Ni-cluster catalysts, is developed. The environment in heat treatment process is observed to markedly alter the catalytic behavior of the obtained Ni-clusters. The beneficial effect of using the carbonizing atmosphere (CH4/N2=150/150 sccm) in the heat treatment process is the formation of encapsulating carbonaceous layer around the Ni-clusters, which prevents the coalescence, yet maintaining the high catalytic activity for the Ni-clusters. Such kinds of Ni-clusters facilitate the growth of defectless CNTs, which contain mostly hexagons.
Relation:	Diamond and Related Materials 14(3-7), pp.774-777
DOI:	10.1016/j.diamond.2004.12.033
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

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