Fabrication of ternary AgBr/BiPO4/g-C3N4 heterostructure with dual Z-scheme and its visible light photocatalytic activity for Reactive Blue 19

A plasmonic photocatalyst of AgBr/BiPO4/g-C3N4 was prepared. X-ray powder diffraction, Scanning electron microscope, Transmission microscopy, Fourier infrared spectroscopy, Ultraviolet Visible diffuse reflectance spectroscopy and photoluminescence emission spectra have been employed to determine the structure, morphology optical property as-prepared composite analysis reasons for improving photocatalytic efficiency. The optimal doping ratio AgBr 10 wt% by degrading 20 mg/L Reactive Blue 19 (RB19) under visible light (? > 420 nm), wt%AgBr/BiPO4/g-C3N4 degraded RB19 2.59% at 40 min, which is ascribed synergistic effects interface AgBr, BiPO4 g-C3N4. effect catalyst dosage, initial concentration pH solution on efficiency investigated. Four cycles experiments were conducted. Finally, through trapping experiment, we found that main active factor in process O2-. possible mechanism discussed connection with Ag substances interface.