Synthesis of Bismuth Nanoparticles Using Microwave Irradiation Method

Abstract

The synthesis of bismuth nanoparticles has been successfully carried out using Citrus limon extract. This study uses the green synthesis method using microwave irradiation. Microwave irradiation can speed up reaction time and has the advantage of homogeneous heating which can directly affect the nucleation process of nanoparticle synthesis. The synthesis of bismuth nanoparticles was carried out by mixing nitrate pentahydrate powder (Bi (NO3)3). 5H2O with Citrus limon extract and added with NaOH then heated with 450W microwave irradiation power at a heating time of 5 minutes. The formation of bismuth nanoparticles was indicated by a change in the color of the solution from orange to black and the UV-Vis spectrum of the nanoparticles showed a wavelength of 275 nm with an absorbance of 2.008 a.u. TEM characterization shows that the bismuth nanoparticle has a spherical shape with an average size of 35.56 nm.