Tunable photocatalytic selectivity of fluoropolymer PVDF modified TiO2

► Fluoropolymer was used to modify TiO2 firstly. ► PVDF/TiO2 shows high photocatalytic selectivity by degrading mixed solution of cationic dyes MB and anionic dyes MO. ► The selectivity can be tuned by changing the PVDF modification amount.