Enhancement of photoelectric catalytic activity of TiO2 film via Polyaniline hybridization

► Polyaniline/TiO2 film was prepared using the sol-gel method followed by chemisorption. ► Photoelectrocatalytic degradation rate of 2,4-dichlorophenol was enhanced by 57.5%. ► The modification of Polyaniline to TiO2 film caused a rapid charge separation. ► Best degradation efficiency was acquired at 1.5 V with 1 nm thick PANI.