Citation:
CAO Yonga, ZHAO Yuna, JIAO Qing-Ze. Growth of Carbon Nanotubes using Layered Double Hydroxides Containing Transition Metal Iron, Cobalt or Nickel as Catalytic Precursors[J]. Chinese Journal of Applied Chemistry,
;2010, 27(4): 445-448.
doi:
10.3724/SP.J.1095.2010.90391
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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.
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