Thermodynamic and kinetic study of synthesised graphene oxide-CuO nanocomposites: A way forward to fuel additive and photocatalytic potentials

Saba Sehar, Farooq Sher, Shengfu Zhang, Ushna Khalid, Jasmina Sulejmanović, Eder C. Lima

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    Rectangular shaped GO-CuO nanocomposites have gained special attention because of spectacular applications in wastewater treatment. However, due to a lack of research, the fuel additive properties of GO-CuO are still unreported. A proper synthesis and characterisation methods are necessary to investigate the fuel additive properties of GO-CuO. The present research demonstrates the synthesis of graphene oxide (GO) sheets via modified Hummers' method. Further, GO-CuO nanohybrid was prepared by fast, cost-effective, and easy to handle solvothermal approach. The crystal data such as crystal structure, unit cell parameters, space groups, crystal system, and coordinates were explained via XRD analysis. Physical and combustion properties of fuel were analysed at different concentrations (0, 20, 40, 60, and 80 ppm) of diesel-GO-CuO blend for fuel quality parameters. The flash point and fire point of pure diesel oil were observed as 78 and 80 °C which were decreased to 50 and 58 °C, respectively, at 80 ppm concentration. With GO-CuO nanocomposites, the cloud point and pour point decrease until a temperature of −8 °C and − 19 °C, respectively, with a pronounced decrease in the viscosity up to 1.83 mm 2/s. Further, the photocatalytic degradation of Methylene Red (MR) dye is studied with the effect of changing H 2O 2, photocatalyst, and dye concentrations with time. Remarkably, the reaction kinetics and MR degradation of about 94% with sixth-time recyclability were observed. The results of this study showed improved MR degradation when using GO-CuO with H 2O 2. GO-CuO applications can be utilised to remove other dyes in future and to improve fuel quality parameters.

    Original languageEnglish
    Article number113494
    JournalJournal of Molecular Liquids
    Early online date3 Jun 2020
    Publication statusPublished - 1 Sept 2020

    Bibliographical note

    NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Molecular Liquids. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Molecular Liquids, 313, (2020) DOI: 10.1016/j.molliq.2020.113494

    © 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International


    • Crystal structure
    • Fuel additive
    • Graphene oxide
    • Nanohybrid
    • Photocatalysis
    • Photocatalytic potentials

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Atomic and Molecular Physics, and Optics
    • Condensed Matter Physics
    • Spectroscopy
    • Physical and Theoretical Chemistry
    • Materials Chemistry


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