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<p>This study focuses on the green synthesis of Copper Oxide Nanoparticles (CuONPs) using Ricinus communis leaf extract, emphasizing their photocatalytic and antibacterial applications. The X-ray diffraction (XRD) analysis confirmed the crystalline structure of the CuONPs with an average crystallite size of 52–55&#xa0;nm, while EDX and FESEM analyses verified their purity and spherical morphology, showing particle sizes between 50 and 68&#xa0;nm. FTIR analysis identified phenols and flavonoids in the plant extract as key agents in nanoparticle synthesis, and XPS analysis provided insights into the surface chemistry of CuONPs. The CuONPs demonstrated exceptional photocatalytic efficiency by degrading 96.37% of a 10&#xa0;ppm Congo Red (CR) dye solution within 60&#xa0;min under UV light, following pseudo-first-order kinetics. Furthermore, the CuONPs exhibited strong antibacterial activity, with the highest inhibition zones against <i>Escherichia coli</i> (17.25 ± 0.06&#xa0;mm) and <i>Bacillus sphaericus</i> (16.80 ± 0.06&#xa0;mm), alongside moderate activity against other pathogens such as <i>Staphylococcus aureus</i> (14.80 ± 0.04&#xa0;mm), <i>Streptococcus lactis</i> (14.60 ± 0.09&#xa0;mm), and <i>Klebsiella pneumoniae</i> (12.26 ± 0.08&#xa0;mm). The nanoparticles also maintained high photocatalytic stability over six cycles with minimal loss in efficiency. This research highlights a sustainable, economical, and effective approach for synthesizing CuONPs, demonstrating their potential as photocatalysts for dye degradation and as antimicrobial agents, contributing to eco-friendly industrial wastewater treatment.</p> Graphical Abstract <p></p>

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Green Synthesis of Copper Oxide Nanoparticles (CuONPs) using Ricinus Communis: Efficient Photocatalytic Dye Degradation and Antibacterial Applications

  • 期刊论文

  • 发表日期：

    2025年3月10日

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  • Sumalatha Boddu,
  • Bhanu Prasad Marri,
  • Raveena Malkari Katika,
  • Indira Mikkili,
  • John Babu Dulla,
  • Venkata Narayana Allugunulla,
  • Sireesha Malladi,
  • Anoar Ali Khan

摘要

This study focuses on the green synthesis of Copper Oxide Nanoparticles (CuONPs) using Ricinus communis leaf extract, emphasizing their photocatalytic and antibacterial applications. The X-ray diffraction (XRD) analysis confirmed the crystalline structure of the CuONPs with an average crystallite size of 52–55 nm, while EDX and FESEM analyses verified their purity and spherical morphology, showing particle sizes between 50 and 68 nm. FTIR analysis identified phenols and flavonoids in the plant extract as key agents in nanoparticle synthesis, and XPS analysis provided insights into the surface chemistry of CuONPs. The CuONPs demonstrated exceptional photocatalytic efficiency by degrading 96.37% of a 10 ppm Congo Red (CR) dye solution within 60 min under UV light, following pseudo-first-order kinetics. Furthermore, the CuONPs exhibited strong antibacterial activity, with the highest inhibition zones against Escherichia coli (17.25 ± 0.06 mm) and Bacillus sphaericus (16.80 ± 0.06 mm), alongside moderate activity against other pathogens such as Staphylococcus aureus (14.80 ± 0.04 mm), Streptococcus lactis (14.60 ± 0.09 mm), and Klebsiella pneumoniae (12.26 ± 0.08 mm). The nanoparticles also maintained high photocatalytic stability over six cycles with minimal loss in efficiency. This research highlights a sustainable, economical, and effective approach for synthesizing CuONPs, demonstrating their potential as photocatalysts for dye degradation and as antimicrobial agents, contributing to eco-friendly industrial wastewater treatment.

Graphical Abstract