Phytosynthesis of silver nanoparticles using Coccinia grandis leaf extract and its application in the photocatalytic degradation

Silver nanoparticles were successfully synthesized from aqueous AgNO3 through a simple green route using the leaf extract of Coccinia grandis as a reducing as well as capping agent. The results obtained from UV–vis spectrum, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and Fourier-transform infra red spectroscopy (FTIR) and high-resolution transmission electron microscopy (HRTEM) revealed that the biosynthesis of silver nanoparticles were in the size range of 20–30 nm and is crystallized in face centered cubic symmetry. Further, the thermal stability of nanoparticles was studied using thermo gravimetric analyzer (TGA) and differential scanning calorimeter (DSC). Photocatalytic property of the Ag nanoparticles was investigated by degradation of Coomassie Brilliant Blue G-250 under UV light. The results show that Ag nanoparticles have suitable activity for the degradation of Coomassie Brilliant Blue G-250.

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► For the first time, the use of Coccinia grandis L. leaf extract in the phytosynthesis of silver nanoparticles was described.
► The extract is a new and renewable capping, as well as reducing agent.
► Nanoparticles with crystallite size of 20–30 nm were obtained.
► The Ag nanoparticles exhibit photocatalytic activity under UV light.
► The TG–DSC results establish the thermal stability of the silver NPs.