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Niobium doped TiO2 films can combine properties of TCO (transparent conductive oxide) with superhydrophilicity activated by UV radiation. Ti-Nb metal films were deposited on a glass substrate through triode magnetron sputtering. Afterward, the Ti-Nb metallic films were oxidized at 600 °C during 1.0 h in air atmosphere, with similar parameters of those used in glass heat-treatment. Measurements of roughness, crystallization, chemical composition, and wettability were carried out through atomic force microscopy, X-ray diffraction, X-ray fluorescence, and contact angle, respectively. Results showed that all films were crystallized as rutile-TiO2 phase and were transparent in visible range. TiO2:Nb films showed nanometer roughness that can be classified as superhydrophilic, after activation with UV light. The contact angle values were similar to those of pure TiO2 films, that is, the TiO2:Nb films preserved the self-cleaning properties.

Efeito do teor de nióbio na molhabilidade de filmes TiO2:Nb