Abstract
This work presents a study of the structural, morphological, and optical properties of titanium dioxide thin films prepared via chemical bath deposition method, after being submitted to annealing processes varying the temperature from 373 to 723K. The presence of the Rutile phase in all the samples was identified using X-ray diffraction measurements. When the annealing temperature increased to 723K, the presence of the Anatase phase was observed. From scanning electron microscopy measurements, the formation of nanoflowers was also perceived; these flower-like structures are composed of nanorods of around ∼10nm in length. With increasing annealing temperature, these structures disappear trans-forming into platelets distributed over the whole surface. A gap energy (Eg) of 3.0eV was determined, and this value decreased to 2.98eV after the temperature of T=723K was implemented, which is also where the Anatase phase was observed.
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