The water quality is one of the mostly discussed problems in the last period of time and the researchers all over the world are concerned in finding new and efficient ways for its purification and destruction of organic and inorganic pollutants. Photocatalysis is one of the best methods to achieve an advanced purification. TiO2, pure or doped, is one of the most widely spread semiconducting oxide photocatalyst due to its superior optical and electrical properties, low cost, good chemical stability and non-toxicity. In the present work, un-doped and Fe3+ doped TiO2 coatings deposited on glass and ITO/glass anodes were prepared by dip-coating from a sol-gel solution. The solgel process was followed by the means of viscosity measurements. The materials were annealed at two temperatures: 300°C and 500°C. The influence of the dopant concentration and of the annealing temperature on the structure and the correlation structure – catalytic properties were studied. The influence of polyethylene glycol introduction on the materials properties was also established. The structure of the obtained films was studied by X-ray diffraction (XRD) and transmission electron microscopy (TEM), both on films and on the corresponding un-suppoeted gels. The morphology of the deposited coatings was established by scanning electron microspoy (SEM). The results concerning the materials structure were correlated with photocatalytic responses obtained for the decomposition of salicylic acid, used as a model pollutant, and for the destruction of the bacteria Escherichia Coli.