In the present work total reducing strength or phenolic compounds in leaves extracts of Conocarpus erectus and Nerium indicum were determined and then zinc nanoparticles were synthesized by using only methanol extract of Conocarpus erectus leaves as reducing agent because of its higher values of total phenolic compounds (296 ± 9 µg/g) in comparison to Nerium indicum (185 ± 6 µg/g). Characterization of the green synthesized Zn NPs was performed by SEM (Scanning Electron Microscope) and XRD (X-Ray Diffractometer) techniques. The size of Zn nanoparticles was estimated in the range of 10-70 nm. The usage of plant extract for the preparation of Zn nanoparticles makes the process cost effective, non-toxic and green method.
