Synthesis of Cobalt Nanoparticles Using Two Methods: Physical and Biological

Abstract

Laser ablation and biosynthesis are two promising and sustainable processes for obtaining nanoparticles (NPs). This work focused on these two methods among the many nanosynthesis methods because they are easy and environmentally friendly. These two methods were used to synthesize cobalt nanoparticles (CoNPs), which were then characterized optically and structurally. The results showed that the obtained CoNPs had a hexagonal phase and polycrystalline structure with the average crystalline size of (27.21 nm) and (76.83 nm) when synthesized physically and biologically, respectively. The resulting NPs' shapes were semi-spherical with the appearance of elliptical shapes due to agglomeration. The biologically synthesized NPs were more absorbent compared to the physically synthesized ones, as the biological method produced a higher concentration of NPs. This work discusses one aspect of the simple comparison between the two sustainable syntheses, with a proposal for its future development.