About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Green Synthesis of MgO Nanoparticles Using Chromolaena Odorata: A Multifunctional Assessment of Antioxidant, Antibacterial, and Photocatalytic Performance |
| Author(s) |
Godfrey Osatohamwen Otabor, Esther Uwidia Ikhuoria, Joshua Osaretin ONAIFO |
| On-Site Speaker (Planned) |
Godfrey Osatohamwen Otabor |
| Abstract Scope |
This study reports the green synthesis and multifunctional assessment of MgO nanoparticles (MgONPs) using *Chromolaena odorata* (Siam weed) leaf extract as a sustainable biogenic precursor. FTIR analysis confirmed O–H, C=C, and Mg–O stretching vibrations, while XRD, BET, and DLS analyses revealed crystalline, thermally stable, mesoporous nanoparticles with high surface area (355.962 m²/g) and average particle size of ~44.57 nm. The biosynthesized MgONPs exhibited strong antioxidant activity with an IC₅₀ of 258 µg/mL, comparable to ascorbic acid, and significant antibacterial activity against *Escherichia coli* and *Staphylococcus aureus* with inhibition zones up to 30 mm. Photocatalytic experiments achieved 92.82% methylene blue degradation and 99.11% TOC mineralization within 360 min under optimal conditions. Adsorption followed the Freundlich isotherm (R² = 0.958) and pseudo-first-order kinetics, while the catalyst retained ~80% efficiency after three reuse cycles, highlighting its environmental and biomedical potential. |