Growth of carbon nanotubes using layered double hydroxides containing iron, cobalt or nickel as catalytic precursors

doi:10.3724/SP.J.1095.2010.90391

Chinese Journal of Applied Chemistry ›› 2010, Vol. 27 ›› Issue (04): 445-448.DOI: 10.3724/SP.J.1095.2010.90391

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Growth of carbon nanotubes using layered double hydroxides containing iron, cobalt or nickel as catalytic precursors

CAO Yong1,2, ZHAO Yu1, JIAO Qing-Ze1*

(1.School of Chemical Engineering and Environment,Beijing Institute of Technology,Beijing 100081;
2.Institute of Environment and Municipal Engineering,North China Institute of Water
]Conservancy and Hydroelectric Power,Zhengzhou 450011)

Received:2009-06-09 Revised:2009-09-28 Published:2010-04-10 Online:2010-04-10

Abstract

Abstract:

Using hexane as source material, carbon nanotubes(CNTs) were grown by chemical vapor deposition process on layered double hydroxides(LDHs) containing similar amounts of iron, cobalt or nickel as catalysts. Catalysts were obtained by calcination of LDH precursors followed by reduction. The materials were characterized by X-ray diffractometry, scaning electron microscopy, transmission electron microscopy and Raman spectroscopy. The results indicated that all CNTs exhibited are multi-walled CNTs. The activity order of these three catalysts is nickel＞iron＞cobalt. The CNTs grown on cobalt catalyst have a smaller diameter and contain more graphite, while the CNTs grown on nickel catalyst have a higher density, a thicker wall and less graphite. The activity of catalyst and density of CNTs mainly could be interpreted from on the structure of CNTs.

Key words: Layered double hydroxides, Carbon nanotubes, Catalytic precursor

CLC Number:

O631

CAO Yong1,2, ZHAO Yu1, JIAO Qing-Ze1*. Growth of carbon nanotubes using layered double hydroxides containing iron, cobalt or nickel as catalytic precursors[J]. Chinese Journal of Applied Chemistry, 2010, 27(04): 445-448.

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Growth of carbon nanotubes using layered double hydroxides containing iron, cobalt or nickel as catalytic precursors

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