The synthesis of zinc oxide nanoparticles (ZnO) using herbal extract is always environmentally benign. The present investigation focuses on the synthesis of ZnO nanoparticles using aqueous extracts of various parts of Passiflora edulis Sims. f. flavicarpa Deg. (Passion fruit). The plant is rich in alkaloids, glycosides, flavonoids and triterpenes. UV-Visible double beam spectrophotometric analysis was used for characterization of ZnO nanoparticles with different time intervals which were synthesized by plant extracts. The bio-reduction completes in two hr incubation of reaction mixtures with strong broad peaks at 332 nm from leaves, 296 nm from stem and 326 nm from flower extracts. Hence the biosynthesis of ZnO nanoparticles using aqueous extracts of P. edulis could be an alternative to chemical methods and exploited in various biofields.
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