Structural and optical properties of TIO2 nanostructures synthesized by the chemical bath deposition method for uv sensors

Nano-structured thin films of titanium dioxide (TiO2) were fabricated using the chemical bath deposition method or CBD, varying in a wide range the synthesis parameters: deposition time, temperature and pH of the solution. From the study of the structural properties, the existence of the Rutile and Brookite phases was established in the material, the latter being favored due to the presence of Ammonium Hydroxide (NH4OH) as a reactive in the solution. Using scanning electron microscopy measurements (SEM) the dependence of the method with the formation of nanoflowers or nanorod-like structures was corroborated. Through UV-Vis- NIR spectroscopy (transmitance and reflectance), the energy gap of the samples was obtained and evidence of high absorption in the UV region of the radiation spectra was found.