Enhanced cleanability of super-hydrophilic TiO2-SiO2 composite surfaces prepared via a sol-gel route

►Sol-gel versatility allows producing super-hydrophilic TiO2-SiO2 thin films. ►TiO2-SiO2 films show a natural, persistent and photo-regenerable super-hydrophilicity. ►Cleanability of composite films can be measured by dynamic wettability experiments. ► Suitable sol formulation enables the formation of surfaces with enhanced cleanability.