Facile fabrication of efficient AgBr-TiO2 nanoheterostructured photocatalyst for degrading pollutants and its photogenerated charge transfer mechanism

► A microemulsion-like chemical precipitation is developed for AgBr-TiO2 composite. ► The composite displays effective charge transfers between AgBr and TiO2. ► A charge transfer mechanism in the AgBr-TiO2 composite is suggested. ► The suggested mechanism is responsible for the enhanced photocatalytic activity.