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To take advantage of the high charge carrier separation efficiency of TiO2/g-C3N4 photocatalyst,which can generate a large number of free electrons,we employed TiO2/g-C3N4 heterojunction to activate persulfate(PS)for enhancing pollutants photodegradation under visible-light irradiation.In this study,the TiO2/g-C3N4 photocatalyst was synthesized by a simple calcination method,and we chose AAP as a model pollutant to examine the degradation efficiency of the photocatalytic system.