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<p>Eco-friendly phytochemical inspired Magnesium oxide nanoparticles (MgONPs) were successfully prepared using aqueous Rubber Leaf (<i>Hevea brasiliensis</i>) extract. The SEM image demonstrated roughly spherical particles and a moderate level of aggregation due to phytochemical surface modification. The average particle size is 100.5&#xa0;nm with a polydispersity index of 0.343. XRD confirmed the crystalline nature of MgO and a face-centered cubic structure. The BET and BJH analysis demonstrated a mesoporous structure for MgO-NPs. The surface area is 251 m<sup>2</sup>/g; the average pore volume is 0.127&#xa0;cc/g; and the average pore diameter is 2.10&#xa0;nm. TGA/DTA analysis confirmed the stability of the sample up to 625&#xa0;°C. RL-MgONPs had excellent photocatalytic activity, degrading methylene blue by 87.78% and mineralizing it by 93.33% under optimum conditions (0.25&#xa0;g catalyst, 10 ppm MB, pH 7), interacting through the help of reactive oxygen species. Kinetics indicated first-order kinetics with a half-life time of 123.75&#xa0;min. The antibacterial property was established against <i>Escherichia coli</i> (27.0 ± 0.03&#xa0;mm) and <i>Staphylococcus aureus</i> (25.0 ± 0.04&#xa0;mm). The results unravel the potentiality of RL-MgONPs for environmental and biomedical applications.</p> Graphical Abstract <p></p>

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Phytochemical-mediated Green Synthesis of Spherical Magnesium Oxide Nanoparticles Using Aqueous Hevea brasiliensis (Rubber Leaf) Extract for Biomedical (Antioxidant and Antibacterial) and Environmental (Photocatalytic Degradation of Methylene Blue Dye) Applications

  • 期刊论文

  • 发表日期：

    2026年6月1日

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  • Godfrey Osatohamwen Otabor,
  • Esther Uwidia Ikhuoria

摘要

Eco-friendly phytochemical inspired Magnesium oxide nanoparticles (MgONPs) were successfully prepared using aqueous Rubber Leaf (Hevea brasiliensis) extract. The SEM image demonstrated roughly spherical particles and a moderate level of aggregation due to phytochemical surface modification. The average particle size is 100.5 nm with a polydispersity index of 0.343. XRD confirmed the crystalline nature of MgO and a face-centered cubic structure. The BET and BJH analysis demonstrated a mesoporous structure for MgO-NPs. The surface area is 251 m2/g; the average pore volume is 0.127 cc/g; and the average pore diameter is 2.10 nm. TGA/DTA analysis confirmed the stability of the sample up to 625 °C. RL-MgONPs had excellent photocatalytic activity, degrading methylene blue by 87.78% and mineralizing it by 93.33% under optimum conditions (0.25 g catalyst, 10 ppm MB, pH 7), interacting through the help of reactive oxygen species. Kinetics indicated first-order kinetics with a half-life time of 123.75 min. The antibacterial property was established against Escherichia coli (27.0 ± 0.03 mm) and Staphylococcus aureus (25.0 ± 0.04 mm). The results unravel the potentiality of RL-MgONPs for environmental and biomedical applications.

Graphical Abstract