Green synthesis of silver nanoparticles from Cassia obtusifolia leaves extract: Characterization and antioxidant activity

The green synthesis of nanoparticles by plant extracts considered an economic efficient methods and ecofriendly environment. In this study, green synthesis of silver nanoparticles (AgNPs) using Cassia obtusifolia leaf extract as a reducing agent was investigated. The antioxidant activity, and some of clinical applications of synthesized nanoparticles were evaluated. UV-Vis spectroscopy and the change in the color confirmed the formation of silver nanoparticles which revealed a single peak at 410 nm. Atomic force microscopy analysis revealed the average particle size of AgNPs reached to 57.42 nm. AgNPs were further characterized by the characteristic peaks, which observed in the X-ray diffraction image. The possible functional groups of AgNPs solutions were identified by Fourier-transform infrared spectroscopy FTIR. The results showed that the synthesize AgNPs have high antioxidant activity.