Synthèse verte de nanoparticules de NiO : étude des propriétés structurales et morphologiques.

Abstract

This study reports a green synthesis route for nickel oxide (NiO) nanoparticles using an aqueous extract of bee pollen as both a reducing and stabilizing agent. The synthesized nanoparticles were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD analysis revealed a cubic NaCl-type crystal structure with a lattice parameter of a = 4.168 Å and an average crystallite size of approximately 37 nm. The low values of dislocation density (0.7795 × 10⁻³ nm⁻²) and microstrain (0.5033 × 10⁻³) indicate a high degree of crystallinity of the elaborated material. SEM morphological analysis revealed quasi-spherical nanoparticles with a relatively uniform size distribution. Slight agglomeration, attributed to the high surface energy of the nanoparticles, was also observed.