• Scalable preparation of high-quality graphene by electrochemical exfoliation: effect of hydrogen peroxide addition

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    • Keywords


      Electrochemical exfoliation; graphene; Raman spectroscopy; TGA; XRD.

    • Abstract


      Graphene being a monolayer of graphite is becoming a hot topic of research because of its excellent properties. The exceptional properties of graphene appear from the 2P orbitals, which form the p-state bands that relocate over the sheets of carbon that comprise graphene. Graphene has a wide range of applications, and the most cost-effective and efficient method for producing graphene is highly preferred. This article presents an eco-friendly, economic, facile and high-yielding one-step method for producing high-quality graphene. In this study, graphene was fabricated by electrochemical exfoliation technique in aqueous medium with and without addition of H$_2$O$_2$. The as-synthesized exfoliated graphene (EG) are characterized by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, Raman spectroscopy, thermogravimetric analysis, etc. The key conclusions of this research are that adding H$_2$O$_2$ had a big role in manufacturing high-quality graphene, which is important for applications in the future. A specific H$_2$O$_2$ concentration can be used to regulate the quantity of graphene layers, flaws and oxygen functional groups. With the addition of H$_2$O$_2$, the electrical conductivity and carrier concentration increase. This can be explained by the nucleophilicity of OH$^–$ and O$_2$$^{2–}$. EG with H$_2$O$_2$ addition has multi-layered structure with fewer flaws as per Raman spectra.

    • Author Affiliations



      1. Department of Applied Sciences and Humanities, National Institute of Advanced Manufacturing Technology (NIAMT), Ranchi 834003, India
      2. Thin Film Laboratory, National Institute of Advanced Manufacturing Technology (NIAMT), Ranchi 834003, India
    • Dates

  • Bulletin of Materials Science | News

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      Posted on July 25, 2019

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