Bio-Synthesized Silver Nanoparticles For Effective Photo- catalytic Degradation of Congo Red Dye in Aqueous Solutions: Optimization Studies Using Response Surface Methodology

The focus of the project is new, low cost and simple nature mediated formation silver nanoparticles (Ag-NPs) using leaf extract Anisomeles malabarica. shape size, structure, element composition, functional groups green synthetic Ag-NPs have been studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive (EDX), Fourier Transform Infrared (FTIR), respectively. BET analysis has used to calculate specific surface area particles, GC- MS confirm presence biologically active components in extracts. Based on observed results, possible mechanism AgNPs given. obtained physical property spherical crystallinity, with an average size about 63 nm. Ag- NPs shown promising potential removal organic pollutants Congo red (CR) dyes. Dye as a function contact time also carefully studied. experimental value dye degradation study was fitted first-order linear kinetic model understand reaction rate. response methodology effect catalyst concentration, irradiation percentage process optimization based Box-Behnken Design Methodology (RSM). result RSM R2 = 99.97 % gives satisfactory correlation between predicted for removal. After 15 minutes time, maximum achieved under optimal conditions (1 mM 1 mg photocatalyst concentration). Therefore, we were able produce malabarica that can degrade azo