Green synthesis, spectral characterization, microbial activities, and antioxidant activities of cobalt oxide nanoparticles using Aerva lanata leaves extract

Abstract

In the present study, cobalt nanoparticles were synthesized by cost effective method using Aerva lanata  leaves extract and characterized using various techniques such as UV-visible spectrophotometry, Fourier transform infrared spectrometry(FT-IR), Fluorescence spectroscopy(FL),  and Scanning electron microscopy(SEM) coupled with Energy dispersive micro analysis(EDS) and XRD. The spectroscopic methods confirmed the formation of cobalt nanoparticles and the microscopic technique confirmed the shape and size of the cobalt nanoparticles as spherical. Antibacterial activity of the synthesized nanoparticles was measured by zone inhibition method. The cobalt nanoparticles showed effective antibacterial activity against human pathogenic bacteria such as Pseudomonas Aeruginosa and Escherichia coli. The usage of plant extract for the preparation of Cobalt nanoparticle makes the process cost effective, non-hazardous and green method.