Numerous strategies are used for preparing nanoparticles. The green preparation method is environmentally friendly, economical, simple, and faster nanoparticle production. Mn3O4 nanoparticles were prepared by a simple green chemical route using Manganese Dichloride Tetrahydrate (MnCl2.4H2O) as a precursor with Olive leaves extract as a stabilizer agent in the presence of Sodium hydroxide at room t...