OPTICALLY ACTIVE TiO2 FILMS FABRICATED BY SPIN COATING METHOD FOR METHYLENE BLUE PHOTOREMEDIATION

The spin-coating process was used to create the TiO₂ layer successfully. The TiO₂ film was created by dissolving TiO₂ nanopowder in terpineol and ethylcellulose, and then spin coating it onto the corning glass. The films' shape, phase, and optical properties were then determined using SEM, XRD, and UV-Vis. Photocatalytic measurements of TiO₂ films were performed using a UV lamp to irradiate a 12 mg/l methylene blue solution for 5 hours. According to the results, all TiO₂ films feature an anatase phase with crystallite size values ranging from 5.55 nm to 6.94 nm and an absorbance region near the UV range. The best photocatalytic activity was found in a film containing TiO₂ particles that had been stirred for 5 hours with the value of constant rate of discoloration dye 0.0032/min.