Bio-Fabrication, Spectroscopic Investigation and Antibacterial Potency of Ag-Co Bimetallic Nanoparticles Synthesized from the Root Extract of Borassus aethiopum (Palmyra Palm)

Abstract

In this study, silver-cobalt bimetallic hybrid nanoparticles were synthesized using green method from AgNO₃ and CoCl₂ metal precursors as well as the locally available root extract of Borassus aethiopum acting as the reducing agent. The formation of bimetallic nanoparticles was first noticed by a color change of the reaction mixture from light pink to light brown as the result of Surface Plasmon absorptions. The optical measurements using UV-Vis showed the maximum absorption wavelength at 420nm while the functional group identification using FT-IR revealed some replacements in the absorption of functional groups, disappearance, and appearance of some others in the spectra of the BMNPs relative to that of the root extract indicating that those involved in the bio-reduction process. In vitro antibacterial potency was investigated against five clinically isolated bacteria. The outcome of the result suggested that they inhibit the tested bacteria especially against Salmonella typhi, Bacillus subtilis and Klebsiella pneumoniae. Thus, it can be developed as a bio-control agent for the treatment of diseases caused by these bacterial pathogens.