Isaac Scientific Publishing

Journal of Advances in Nanomaterials

Effect of the Support on Structure of the Multi-Walled Carbon Nanotubes Grown By CCVD over Nickel Nanoparticles

Download PDF (530.6 KB) PP. 169 - 178 Pub. Date: September 20, 2017

DOI: 10.22606/jan.2017.23005

Author(s)

  • N.V. Lemesh*
    L.V. Pisarzhevskiy Institute of Physical Chemistry of National Academy of Sciences of Ukraine, Kyiv, Ukraine
  • P. E. Strizhak

    L.V. Pisarzhevskiy Institute of Physical Chemistry of National Academy of Sciences of Ukraine, Kyiv, Ukraine

Abstract

Effect of the support and preparation method of the Ni/CaO and Ni/CaCO3 impregnated catalysts on the morphology, diameters and growth mechanisms of the MWCNTs grown from ethylene by CCVD synthesis were studied. It was found that the interactions between the support and Ni nanoparticles in both cases are mainly weak and the growth mechanism of the majority of the carbon nanotubes is the “tip-growth”. The structure of the nanotubes produced using different catalysts was, however, significantly different. Use of the Ni/CaO catalyst results in the formation of two types of the MWCNTs on the basis of the diameters. At the Ni/CaCO3, the formation of the MWCNTs and chain-like carbons fibers was observed. The differences in the morphology and diameters related to the distinct chemical transformation of the support and active phase of the catalyst during the catalyst preparation and reduction, as well as during synthesis of the nanotubes.

Keywords

Multi-walled carbon nanotubes, support, diameter distribution, morphology, nickel nanoparticles.

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