SHAPE CONTROLLED SYNTHESIS OF GOLD NANOPARTICLES BY TWEAKING OF PVP AND THEIR DYE DEGRADATION CAPABILITY

Abstract

Significant progress has already been made in developing synthetic methods for synthesizing nanoparticles of various sizes and morphologies over the last few decades, and a considerable number of recent studies have been devoted to the characterization and applications of metal nanoparticles. This research has looked into the synthesis of gold nanoparticles using the polymer poly(N-vinyl-2-pyrrolidone) (PVP). PVP's ability to reduce and capping nanoparticles determines their ultimate form after wet chemical synthesis. The conjugation behaviour of polymer PVP with solvent molecules and halide ions can change its ambient nature. Different shaped gold nanospheres, nanotriangles, and nano stars were synthesized by tweaking the reduction of gold precursor (Hydro-Chloroauric acid (HAuCl4.3H2O) by PVP. The synthesized nanoparticles were characterized using UV–Vis absorption spectra, Transmission Electron Microscopy (TEM), and X ray diffraction studies. Peaks in absorption spectra originating from localized surface plasmon resonance (LSPR) were well correlated with electron microscope images and reaction kinetics. Diffraction peaks obtained in XRD studies confirm the crystallization of nanoparticles in the fcc structure, while other structural parameters calculated reveal the differential shape growth.