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The synthesis of metal oxide nanoparticles with the use of plant extract is a promising alternative to traditional chemical methods. The aim of this work was to fabricate MgO nanoparticles using the Artemisia abrotanum herb water extract. The biologically synthesized MgO nanoparticles were characterized by UV–Visible spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) with EDS profile and transmission electron microscopy (TEM). XRD studies confirmed that pure monoclinic crystallite structures of MgO nanoparticles were formed. The average size of MgO nanoparticles was found to be 10 nm. EDS profile confirmed the signal characteristic of magnesium and oxygen. FTIR analysis confirmed the presence of active compounds responsible for the stabilization of MgO nanoparticles. The synthesized nanoparticles showed good catalytic activity in the reduction of methyl orange (MO). MgO nanoparticles also exhibit very good antioxidant properties.
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