Photo-catalytic Characteristics of Sol-Gel Synthesized TiO2 Thin Film

Abstract Thin film of TiO2 was obtained by the sol-gel dip method on the brosilicate glass substrate. It was found that the film was about 1.5µm thick as obtained by 4 successive coatings and annealed at varied temperatures ranged from 300˚C to 1100˚C for 2 hrs. The substrate used was having the surface area of 100mm2. Increasing the annealing temperature caused to change in mineralogical phase of titanium oxide i.e.., amorphous, crystalline antase to rutile phases. The particle size of the titanium oxide film were ranged from 0.1~0.54µm estimated by the SEM analysis. The material showed an absorbance maximum at the wavelength 390nm obtained by UV-visible spectrophotometer. These results therefore, indicated that the TiO2 film obtained relatively at low annealing temperature consisted predominantly with anatase phase; possessed highe