NiTiO3/Ag3PO4 composites with improved photocatalytic activity under visible-light irradiation

A series of NiTiO 3 /Ag 3 PO 4 composites were prepared by a simple ion-exchange deposition method . The composition and morphology of the samples were determined by XRD , EDS and SEM. UV–vis DRS was used to characterize their optical absorption properties. The loading of NiTiO 3 could promote the efficient separation of photoinduced electron-hole pairs and enhance the charge carrier transport to improve the photocatalytic activity . The APO-5 composite exhibited the best photocatalytic activity for the degradation of methyl violet (MV). Kinetics studies indicated that the APO-5 composite showed an apparent rate constant of 0.115   min −1 , which was 2.61 times that of pure Ag 3 PO 4 .