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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    Abstract

    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
    Pages62-67
    Number of pages6
    ISBN (Print)9783037859131
    DOIs
    Publication statusPublished - 2014
    EventInternational Conference on Nanoscience and Nanotechnology (NANO-SciTech) 2013 - Shah Alam, Selangor, Malaysia
    Duration: 1 Mar 20134 Mar 2013
    https://www.scientific.net/AMR.832

    Publication series

    NameAdvanced Materials Research
    Volume832
    ISSN (Print)1022-6680

    Conference

    ConferenceInternational Conference on Nanoscience and Nanotechnology (NANO-SciTech) 2013
    Abbreviated titleNANO-SciTech 2013
    CountryMalaysia
    CityShah Alam, Selangor
    Period1/03/134/03/13
    Internet address

    Keywords

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

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