Mixed anatase/rutile phase of Ag doped TiO2 film for dye degradation

Abstract

Mixed anatase/rutile Ag doped titanium dioxide (TiO2) film successfully fabricated with two simple step. Firstly, Ag doped rutile phase TiO2 was fabricated by hydrothermal method at low temperature of 150°C for 10 hours and followed by various duration of immersion in tayca 320 solution for anatase phase. The various duration of immersion was studied to investigate the optimum time immersion to decorate anatase phase on Ag doped rutile phased TiO2 film in assisting photocatalytic activity. The prepared samples were analyzed for their crystalline structure, morphology, composition, and photocatalytic activity using various analytical techniques such as X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDX) and methylene blue (MB) degradation. It was observed that mixed phased of Ag doped TiO2 film shows an excellent photocatalytic activity compared with the single phase. The optimum immersion time is 1 hour. The photodegradation of 1 hour immersion film was reached 100 percent degradation only for 90 minutes and increased up to 19% compared with no anatase phase film. It was proved that mixed phases has better degradation compared with single phase. The anatase phase helps to avoid recombination between electron and holes pair by capturing the electron and enhanced the photocatalytic activity since the anatase decorated on smooth surface of the rod which is no active area for photocatalytic activity.