Silver nanoparticles: Green Synthesis using Derris trifoliata Seed Extract and It's Applications as a Sensor, Photocatalyst and Antibacterial agent

Abstract

This work focuses on the preparation of silver nanoparticles (AgNPs) by a green synthesis using the seed extract of Derris trifoliata. The optimum time and temperature for the extraction of seeds were determined using FTIR analysis. The seed extract acted as a reducing agent and silver nitrate was used as the metal precursor for the preparation of AgNPs. Optimization of reaction conditions for the preparation of AgNPs and its characterization was done by UV-Vis spectroscopy, FTIR, HRTEM and SAED images. The UV- Visible spectrum of AgNPs revealed a characteristic SPR peak at 433 nm. HRTEM and SAED images confirmed nearly spherical nature of the AgNPs with a diameter of 2–20 nm. H2O2 sensing capacity and the photocatalytic dye degradation of the AgNPs was investigated using UV-Vis spectroscopy. Antibacterial activity of silver nanoparticles on E-coli bacteria was also studied using microtitre plate method.