Bio-Synthesized Silver Nanoparticles Using Pongamia Pinnata (Pongam) Leaves Extract as Effective Catalyst for the Dilapidation of Rhodamine-B Dye

Abstract

This study examined the Rhodamine B (RhB) dye's ability to bind newly synthesised silver nanoparticles (AgNPs) made from the leaves extract of Pongamia Pinnata(Pongam) RhB removal was examined for the possessions of exchange period, original pH, opening colorant concentration, adsorbent dosage, and temperature, all of which had a big impact on its uptake. Then, prepared AgNPs were examined using TEM analysis, X-ray powder diffraction (XRD). Field-emission scanning electron microscopy (FESEM), Fourier transforms infrared (FT-IR) spectra, and Brunauer-Emmet-Teller (BET). High surface area, with a middling of 0.9208 m²/g, was found by BET analysis, supporting its use as an effective adsorbent. Utilizing the Temkin, Langmuir and Freundlich, isotherm models, adsorption isotherms were assessed. The Freundlich isotherm, which has an R² of 0.9912 and indicates multilayer adsorption, provided the best portrayal of the adsorption process. The rate of adsorption were better designated by pseudo-second-order kinetics, and it was revealed that the adsorption process was controlled by both surface adsorption and intra-particle diffusion. Denoting an exothermic and spontaneous adsorption process comprised of thermodynamic parameters with negative values for ∆H°, ∆S° and ∆G°.