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<p>Green synthesis of magnesium oxide nanoparticles (MgONPs) using natural extracts offers a biomedically and environmentally benign route for functional nanomaterial production. In this study, MgONPs were synthesized using aqueous extract from African oil palm leaves (<i>Elaeis guineensis</i>). The nanoparticles exhibited a mesoporous structure with an average pore size of 2.13&#xa0;nm and a high surface area of 318.6&#xa0;m²/g, enhancing bioactivity. Dynamic light scattering analysis showed an average particle size of 100.3&#xa0;nm. Antioxidant activity assessed by DPPH assay revealed concentration-dependent scavenging, with moderate activity (IC₅₀ = 316 ± 4&#xa0;µg/mL) compared to ascorbic acid (IC₅₀ = 204 ± 2&#xa0;µg/mL). Antibacterial activity increased with concentration, showing inhibition zones of 18&#xa0;mm (<i>Escherichia coli</i>) and 15&#xa0;mm (<i>Staphylococcus aureus</i>) at 10&#xa0;mg/mL, with stronger effects against Gram-negative bacteria. Photocatalytic studies under sunlight demonstrated 96.67% degradation of Methylene Blue at 0.2&#xa0;g catalyst loading, 15 ppm dye concentration, and pH 5. Reusability studies followed pseudo-first-order kinetics. These findings highlight OPL-mediated MgONPs as promising sustainable nanocatalysts for environmental and biomedical applications.</p> Graphical abstract <p></p>

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Elaeis guineensis Leaf Extract–Mediated biogenic synthesis of nanostructured Magnesium Oxide (MgO) and its biofunctional and photocatalytic properties

  • 期刊论文

  • 发表日期：

    2026年5月4日

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  • Godfrey Osatohamwen Otabor,
  • Esther Uwidia Ikhuoria,
  • Joshua Osaretin Onaifo

摘要

Green synthesis of magnesium oxide nanoparticles (MgONPs) using natural extracts offers a biomedically and environmentally benign route for functional nanomaterial production. In this study, MgONPs were synthesized using aqueous extract from African oil palm leaves (Elaeis guineensis). The nanoparticles exhibited a mesoporous structure with an average pore size of 2.13 nm and a high surface area of 318.6 m²/g, enhancing bioactivity. Dynamic light scattering analysis showed an average particle size of 100.3 nm. Antioxidant activity assessed by DPPH assay revealed concentration-dependent scavenging, with moderate activity (IC₅₀ = 316 ± 4 µg/mL) compared to ascorbic acid (IC₅₀ = 204 ± 2 µg/mL). Antibacterial activity increased with concentration, showing inhibition zones of 18 mm (Escherichia coli) and 15 mm (Staphylococcus aureus) at 10 mg/mL, with stronger effects against Gram-negative bacteria. Photocatalytic studies under sunlight demonstrated 96.67% degradation of Methylene Blue at 0.2 g catalyst loading, 15 ppm dye concentration, and pH 5. Reusability studies followed pseudo-first-order kinetics. These findings highlight OPL-mediated MgONPs as promising sustainable nanocatalysts for environmental and biomedical applications.

Graphical abstract