Green Synthesis and Photoluminesce Study of Dy Doped CaCO3

Abstract

In this study, we used water-soluble polysaccharides from melon to develop a new green method for the biological production of calcium carbonate crystals. SEM, FT-IR spectroscopy, and X-ray powder diffractometry were used to examine the resulting crystals. The host material is prepared with the amount of 5.549gm CaCl2 and 5.2994gm Na2CO3. In the sintering process, the sample is subjected to its melting temperature in a furnace and then cooled evenly. The phosphor CaCO3 is doped with differing proportions of Dy and SEM micrographs validate the material's nanostructure, which is essential for luminescence. By Dy doping with CaCO3, then crystal structure of a molecule shows prominent XRD peaks. In UV photoluminescence spectra, the greatest emission peak is at 578nm while slake curve shows that for 3 mol% Dy concentrations, show higher luminescence intensity. As the Dy concentration rises over 3 mol%, the brightness intensity decreases due to quenching phenomena.