Formation of carbon nanotubes from methane decomposition: effect of concentration of Fe3O4 on the diameters distributions

Wei Wen Liu, Tijjani Adam, Azizan Aziz, Siang Piao Chai, Abdul Rahman Mohamed, U. Hashim

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    Fe3O4 was used to synthesize narrow diameter of carbon nanotubes (CNTs). The effect of concentration of Fe3O4 on the diameters of carbon nanotubes (CNTs) synthesized by methane decomposition at 1000°C was investigated. We used conventional impregnation method to prepare Fe3O4/MgO catalysts. The results show that the concentration of Fe3O4 greatly affects the diameter distributions of produced CNTs. The CNTs formed by Fe3O4/MgO catalysts, with the mole ratio set at 0.25:9.75 and 1:9 had diameter of 3.23 ± 1.71 and 49.04 ± 33.62nm, respectively, showing that a decrease in concentration of Fe3O4 yields smaller diameter and narrower diameter distribution. A growth model explaining tip-growth and base-growth mechanism is proposed for understanding formation of CNTs.

    Original languageEnglish
    Title of host publicationNanoscience, Nanotechnology and Nanoengineering
    PublisherTrans Tech Publications
    Number of pages6
    ISBN (Print)9783037859131
    Publication statusPublished - 2014
    EventInternational Conference on Nanoscience and Nanotechnology (NANO-SciTech) 2013 - Shah Alam, Selangor, Malaysia
    Duration: 1 Mar 20134 Mar 2013

    Publication series

    NameAdvanced Materials Research
    ISSN (Print)1022-6680


    ConferenceInternational Conference on Nanoscience and Nanotechnology (NANO-SciTech) 2013
    Abbreviated titleNANO-SciTech 2013
    CityShah Alam, Selangor
    Internet address


    • Chemical vapor deposition
    • Graphite
    • Impregnation method
    • Methane
    • Nanotubes

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