Green Synthesis, Characterization And Antioxidant Activity Of ZnO NanoparticlesMediated By Aerial Parts Of Leucas lanata

The hills of Uttarakhand have been known for medicinal plants since Vedic period. Leucas lanata (Dhurlu grass) is also found in this region which belongs to the Lamiaceae family was explored for the green synthesis of ZnO nanoparticles . The aqueous extract of arial part of Leucas lanata is used for reduction of Zn+2 of 20mM of hydrated zinc acetate solution. UV, FTIR, FESEM, EDX and XRD technique are used for the characterization of ZnO nanoparticles. UV-VIS absorption peak observed at 350 and 397nm are due to surface plasma resonance. EDX analysis showing the presence of phytochemicals. The FTIR absorption peaks at 3411cm-1, 2925cm-1 ,1618 cm-1 ,1499 cm-1 ,1410 cm-1,1268 cm-1,1048 cm-1,796 cm-1 and 610 cm-1 are observed indicating the presence of biomolecules as capping reagent. The spherical morphology with particles sizes revealed byXRD, TEM and FESEM analysis. XRD pattern showing crystalline cubic structure of ZnONPs. Antioxidant activity observed by DPPH assay using ascorbic acid as standard.