Abstract: Titanium dioxide (TiO2) prepared through sol gel process is extensively used as a photocatalyst due to the strong oxidizing power of its holes, high photo stability and redox selectivity. In this present work, the microstructure and crystal structure of TiO2, obtained by a sol-gel procedure in acid, neutral and base were investigated. The TiO2 sols were prepared by the hydrolysis and condensation of tetraethyl orthotitanate in ethanol at pH 3, 7 and 10 dip coated on a non conductive substrate (glass). The morphology of the film was examined by SEM, EDX and crystallite structure by X-Ray Diffraction (XRD). The XRD pattern was observed to be sensitive to the heat treatment. At calcination temperature of 300 and 500°C, only anatase phase was observed. As calcination temperature was increased to 700°C, the rutile phase was present for the acid and neutral sol of the TiO2. The XRD data also showed that the crystallite size of TiO2 increased significantly as the temperature is increased from 300 to 700°C.