Synthesis and Characterization of Colloidal Gold Nanoparticles Suspension using Liquid Soaps

Abstract

In this communication, we represent a versatile and effective technique to synthesize stable aqueous dispersions of gold nanoparticles using chemicals presents in the liquid soaps. Auric tetra chloride (HAuCl₄) was used as precursors for synthesis of the gold nanoparticles. The reduction of the gold precursor was carried out using citric acid, Glycerin and other reducing agents present in the liquid soap. Sodium sulphate, sodium chloride present in the liquid soap acts as stabilizing agents. The sources of these precursors in this case were liquid soaps like Pril Perfect (lime), Dettol (Hand Wash), Palmolive, Nomarks (Face Wash), Lakme fruit Burst (Face Wash), Clean & Clear (Face Wash), and Himalaya Neem (Face Wash).

By using different process like thermal reduction, microwave, solvothermal and photo catalytic reduction process the above reaction was accomplished. UV-visible spectroscopy, scanning tunneling microscopy (STM) was used to ascertain the formation of gold nanoparticles. The color of the gold nanoparticles suspension varies from red to blue depending upon the shape and size of the particles

Keywords: Green technology, microwave irradiation, photo catalytic, Autoclave, solvothermal, spectroscopy and microscopy.