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<p>A cost-effective and sustainable coriander powder-derived activated carbon (CPAC) was synthesized directly from coriander powder using potassium carbonate without pre-carbonization. Copper oxide (CuO) nanoparticles were supported on this bio-derived CPAC matrix using a simple impregnation method to enhance the specific capacitance and catalytic performance, such as nitrophenol to aminophenol. The synthesized material was systematically characterized through FTIR, Raman, XRD, SEM, and SEM–EDX. The resulting CPAC@CuO nanocomposite exhibited excellent electrochemical performance, delivering a specific capacitance of 1241&#xa0;F/g at 1.5&#xa0;A/g in 3&#xa0;M KOH electrolyte. The electrode upheld 61.7% capacitance retention after 5000 charge–discharge cycles with a coulombic efficiency of 99.7%, indicating superior cycle stability.</p> Graphical abstract <p></p>

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Coriander powder-derived activated carbon (CPAC)-supported CuO nanocomposite for high-performance supercapacitor and catalytic applications

  • 期刊论文

  • 发表日期：

    2025年12月24日

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  • Sivarama Krishna Lakkaboyana,
  • Reddi Mohan Naidu Kalla,
  • S. V. Prabhakar Vattikuti,
  • Jaewoong Lee,
  • Seepana Praveenkumar,
  • Salah Knani,
  • Reem Alreshidi

摘要

A cost-effective and sustainable coriander powder-derived activated carbon (CPAC) was synthesized directly from coriander powder using potassium carbonate without pre-carbonization. Copper oxide (CuO) nanoparticles were supported on this bio-derived CPAC matrix using a simple impregnation method to enhance the specific capacitance and catalytic performance, such as nitrophenol to aminophenol. The synthesized material was systematically characterized through FTIR, Raman, XRD, SEM, and SEM–EDX. The resulting CPAC@CuO nanocomposite exhibited excellent electrochemical performance, delivering a specific capacitance of 1241 F/g at 1.5 A/g in 3 M KOH electrolyte. The electrode upheld 61.7% capacitance retention after 5000 charge–discharge cycles with a coulombic efficiency of 99.7%, indicating superior cycle stability.

Graphical abstract