فهرست نشریات علمی دسترسی آزاد ایران

It’s a sustainable and environmentally friendly method for reducing agricultural waste, while in the meantime it helps for the production of additional valuables. The production of ZnO nanoparticles by using green method employing four different Zahidi date palm (Phoenix dactylifera L.) residue aqueous extracts such as kernels, spines, leaflets and fibers are reported in the present investigation. The phytochemical content analyses of the prepared extracts show a variation in secondary metabolites for each extract and are discussed to find its role in the formation of nanoparticles and morphology. Kernels extract exhibited the highest total phenolic and flavonoid contents, while leaflet extract showed the highest saponin contents, and spines extract contained the highest alkaloid content. The prepared biosynthesized ZnO nanoparticles were characterized using UV-visible, FTIR, XRD, FESEM, and EDX techniques.Distinct ZnO morphologies were obtained depending on the residues used during synthesis. Kernels extract produced flower-like nanostructures, spines extract generated spherical nanoparticles, leaflet extract formed sheet-like structure, and fiber extract resulted in dense irregular nanostructures. Since all synthesis conditions were maintained constant, the variation in ZnO morphology was mainly attributed to residue-dependent phytochemical differences.