BIOGENIC SYNTHESIS OF ZINC OXIDE NANOPARTICLES USING LEAF EXTRACT OF JUSTICIA ADHATODA AND THEIR ANTIMICROBIAL ACTIVITY

Abstract

In the present study, an inexpensive green route has been demonstrated for the formation of ZnO nanoparticles by biogenic method using aqueous leaf extract of Justicia adhatoda which acts as a reducing and stabilizing agent. The synthesized ZnO nanoparticles were preliminarily characterized by UV-VIS followed by using different analytical techniques such as X-ray diffraction (XRD) and fourier transform infrared spectroscopy (FT-IR). The XRD pattern confirmed that, the synthesized ZnO nanoparticles are of hexagonal wurtzite structure with average calculated grain size less than 9.40 nm. The FT-IR spectra indicated the presence of hydroxyl groups, carboxylic acids which may be responsible for biochemical reaction. The clear zone of inhibition against both gram- positive and gram-negative bacteria confirmed the antimicrobial potential of synthesized ZnO nanoparticles.