Visible Light- Driven Cesium-Titanium Iodide (Cs2TiI6) Double Perovskite Photocatalytic dye Degradation.

Developing novel photocatalytic materials for removing organic contaminants has been a research focus. The current study reports the synthesis of third-generation photocatalysts perovskites and their photocatalytic efficacy. The lead-free cesium-based titanium halide Cs₂TiI₆ double perovskite was successfully synthesized via the solution processing method and characterized by various spectroscopic and morphological characterization techniques such as X-ray diffraction (XRD), UV-visible spectroscopy, Zeta potential, and Transmission Electron Microscope (TEM). The novel aspect of this study is to investigate the photocatalytic efficacy of the Cs₂TiI6 double perovskite. Various morphology and spectroscopy characterization insights about synthesized photocatalysts were explored. Eosin Y (EY) and Eosin B (EB) were chosen as the model compounds for degradation in this work due to their wide applications in industry. The photocatalytic degradation efficiency of Eosin Y and Eosin B dye by Cs₂TiI₆ perovskite photocatalysts after exposure of 240 minutes to visible light was 85.08% and 13.66% respectively. The rate constant of degradation of Eosin Y is approximately 14.66 times larger than that of Eosin B. [ABSTRACT FROM AUTHOR]