Abstract:BiPO4 was synthesized with Bi(NO3) 3.5H2O, Na3PO4.12 H2O hybridized by g-C3N4, and the g-C3N4/BiPO4 presents enhanced performance in the paper. The g-C3N4/BiPO4 photocatalysts were characterized by XRD, FT-IR, SEM, TEM and BET. The photocatalytic activities were evaluated by the degradation of methylene blue under the visible light in the photocatalytic reaction device. TheSexperimentalSresults show that the visible light photocatalytic activity of BiPO4 was greatly enhanced by the hybridization of g-C3N4. A loading amount of 7% g-C3N4 over BiPO4 led to the most obvious increase of the photocatalytic activity under the visible light irradiation. Keywords: Composite photocatalysts; BiPO4; g-C3N4; visible light