Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5437489 | Ceramics International | 2017 | 22 Pages |
Abstract
In this work, 5 mol% Nb2O5-doped TiO2 synthesized sol was sprayed on glazed ceramic tiles. The crystallization of TiO2 nanoparticles occurs on the surface of the tiles after annealing at 600-900 °C, this innovative approach leads to a drastic decrease in the titania grain size as detected by SEM and XRD. The superhydrophilic and self-cleaning performance was evaluated by measuring the water contact angle under UV irradiation and by degradation of methylene blue according to ISO 10678 and JIS R1703-2. The results showed a high performance of doped samples at all temperatures tested, with a marked dependence on the anatase-to-rutile ratio and crystallite size. At 800 °C, the doped samples achieved water contact angle near to zero in just 15 min of UV irradiation, which confirms the high performance of the self-cleaning ceramic tiles.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Andre L. da Silva, Michele Dondi, Dachamir Hotza,