▎ 摘　　要

BiOIO3/GO composite photocatalyst was successfully prepared by hydrothermal method and magnetic stirring method. The prepared photocatalyst was characterized by SEM, TEM, XRD, UV-Vis DRS, FT-IR and XPS. Fluorocarbon resin coating (PEVE) was modified with composite photocatalyst, the antibacterial properties of the composite coatings with different doping ratios of GO were evaluated. Among them, the composite coating BiOIO3/6 wt% GO has the highest sterilization rate, which is nearly doubled compared to the pure BiOIO3 coating. Hydroxyl radicals (.OH) can be demonstrated as the main active species in the photocatalytic reaction. The mechanism of improving the photocatalytic efficiency was proposed. This paper provides some new insights on the development of marine antifouling coatings, and has certain reference significance for the treatment of ship's ballast water.