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<p>Reducing graphene oxide (rGO) in an eco-friendly and cost-effective manner remains a significant challenge because of the hazardous chemicals used in conventional methods. Herein, the green synthesis of rGO, Rhamnus prinoides (RP) was employed as a natural reducing agent. FTIR, PL, SEM, TEM, and XRD analyses confirmed the reduction process. FTIR revealed that the peak intensities for O–H, C = O, and C–O decreased. The SEM and TEM images revealed smoother, less flake-like rGO sheets. The XRD pattern revealed a broad peak at 2θ = 22.87° with a d-spacing of 0.34&#xa0;nm, confirming structural transformation. Green-synthesized rGO showed the largest CV area at 100&#xa0;mV/s, highlighting its excellent potential as a counter electrode for quantum dot-sensitized solar cells.</p> Graphical abstract <p>Schematic synthesis of reduced graphene oxide</p>

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Green synthesis of reduced graphene oxide via methanol-extracted Rhamnus prinoides and its electrochemical activity

  • 期刊论文

  • 发表日期：

    2025年5月28日

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  • Bayisa Batu Kasaye,
  • Megersa Wodajo Shura,
  • Solomon Tiruneh Dibaba,
  • T. Gurumurthi

摘要

Reducing graphene oxide (rGO) in an eco-friendly and cost-effective manner remains a significant challenge because of the hazardous chemicals used in conventional methods. Herein, the green synthesis of rGO, Rhamnus prinoides (RP) was employed as a natural reducing agent. FTIR, PL, SEM, TEM, and XRD analyses confirmed the reduction process. FTIR revealed that the peak intensities for O–H, C = O, and C–O decreased. The SEM and TEM images revealed smoother, less flake-like rGO sheets. The XRD pattern revealed a broad peak at 2θ = 22.87° with a d-spacing of 0.34 nm, confirming structural transformation. Green-synthesized rGO showed the largest CV area at 100 mV/s, highlighting its excellent potential as a counter electrode for quantum dot-sensitized solar cells.

Graphical abstract

Schematic synthesis of reduced graphene oxide