Synthesis and characterization of Cs2TiX6(X=Cl, Br) double perovskites forphotocatalytic dye degradation

Abstract

Massive efforts have been undertaken for better utilization of solar energy in environmental and energy applications. The creation of environmentally friendly, economically viable, and chemically efficient processes is today's key chemistry challenge. The primary goal of this study is to synthesize and confirm the viability of lead-free halide perovskite for photocatalytic efficiency in the degradation of organic dyes namely, Eosin B and Eosin Y in water solutions when exposed to visible light. Lead-free Cesium Titanium halide Cs2TiX6 (X=Cl, Br) double perovskite compound was successfully synthesized by solution process method. The effective synthesis of perovskite photocatalysts was confirmed by various optical, morphological, and structural characterization techniques such as X-ray diffraction (XRD), UV-visible spectrophotometer, Photoluminescence spectroscopy (PL), Zeta potential, Scanning Electron Microscope (SEM), and Transmission Electron Microscope (TEM).Positive zeta values reveal that the generated photocatalyst is functional with the adsorption of anionic dyes. The photodegradation efficiency of Eosin Y by the synthesized perovskite photocatalysts was substantially higher than that of Eosin B.The photocatalytic degradation efficiency of Cs2TiCl6 and Cs2TiBr6 perovskite photocatalysts for Eosin B is 59.12% and 48.77%, respectively, and 72.35% and 89.94% for Eosin Y.