Three-step-in-one synthesis of supercapacitor MWCNT superparamagnetic magnetite composite material under flow

Thaar M.D. Alharbi, Ahmed H.M. Al-Antaki, Mahmoud Moussa, Wayne D. Hutchison, Colin L. Raston

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    7 Citations (Scopus)
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    Composites of multi-walled carbon nanotubes (MWCNTs) and superparamagnetic magnetite nanoparticles, Fe3O4@MWCNT, were synthesized in DMF in a vortex fluidic device (VFD). This involved in situ generation of the iron oxide nanoparticles by laser ablation of bulk iron metal at 1064 nm using a pulsed laser, over the dynamic thin film in the microfluidic platform. The overall processing is a three-step in one operation: (i) slicing MWCNTs, (ii) generating the superparamagnetic nanoparticles and (iii) decorating them on the surface of the MWCNTs. The Fe3O4@MWCNT composites were characterized by transmission electron microscopy, scanning transmission electron microscope, TG analysis, X-ray diffraction and X-ray photoelectron spectroscopy. They were used as an active electrode for supercapacitor measurements, establishing high gravimetric and areal capacitances of 834 F g-1 and 1317.7 mF cm-2 at a scan rate of 10 mV s-1, respectively, which are higher values than those reported using similar materials. In addition, the designer material has a significantly higher specific energy of 115.84 W h kg-1 at a specific power of 2085 W kg-1, thereby showing promise for the material in next-generation energy storage devices.

    Original languageEnglish
    Pages (from-to)3761-3770
    Number of pages10
    JournalNanoscale Advances
    Issue number9
    Publication statusPublished - 19 Aug 2019


    • Multi-walled carbon nanotubes (MWCNTs)
    • Superparamagnetic magnetite nanoparticles
    • Vortex fluidic device
    • Energy storage devices


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