Ag(3)PO(4) Deposited on CuBi(2)O(4) to Construct Z-Scheme Photocatalyst with Excellent Visible-Light Catalytic Performance Toward the Degradation of Diclofenac Sodium

CuBi(2)O(4)/Ag(3)PO(4) was synthesized through a combination of hydrothermal synthesis and an in situ deposition method with sodium stearate as additives, and their textures were characterized with XRD, XPS, SEM/HRTEM, EDS, UV-Vis, and PL. Then, the photodegradation performance of CuBi(2)O(4)/Ag(3)PO(4) toward the degradation of diclofenac sodium (DS) was investigated, and the results indicate that the degradation rate of DS in a CuBi(2)O(4)/Ag(3)PO(4) (1:1) system is 0.0143 min(−1), which is 3.6 times that in the blank irradiation system. Finally, the photocatalytic mechanism of CuBi(2)O(4)/Ag(3)PO(4) was discussed, which follows the Z-Scheme theory, and the performance enhancement of CuBi(2)O(4)/Ag(3)PO(4) was attributed to the improved separation efficiency of photogenerated electron–hole pairs.