TiO2 thin film was fabricated on window glass via PVP modified sol–gel method.
Photocatalytic activity was improved by 4.37 times for decomposing acetone.
Photocatalytic activity was improved by 4.62 times for decomposing benzene.
TiO2 thin film has high transmittance and excellent photocatalytic stability.
TiO2 thin film demonstrates high photocatalytic activity under sunlight.