Effect of titanium-tetraisopropoxide concentration on the photocatalytic efficiency of nanocrystalline thin films TiO2 used for the photodegradation of textile dyes

► Thin films to remove dyes from wastewater via photo redox reactions. ► Synthesis and application of novel TiO2 thin film catalyst. ► Assessment of the catalytic properties and physical origin of catalytic effect. ► TiO2 thin films show ∼60% the efficiency compared to the powdered TiO2. ► Key advantage of thin films is better post treatment handling characteristics.