▎ 摘　　要

NOVELTY - Preparing bismuth oxyiodide (BiOI)/reduced graphene oxide (RGO) binary composite material, involves using bismuth nitrate pentahydrate (Bi(NO3)3.5H2O) and potassium iodide (KI) as precursors, using water as solvent, adding RGO ethanol ultrasonic dispersion, and then undergoes hydrothermal preparation to obtain BiOI/RGO binary composites. USE - Method for preparing bismuth oxyiodide/reduced graphene oxide binary composite material. ADVANTAGE - The composite material has good chemical stability, strong catalytic activity, simple and mature preparation method and cost-effective. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing BiOI/RGO/g-C3 N4 composite photocatalyst, which involves: preparing layered g-C3N4, and dispersing graphitic carbon nitride (g-C3N4) in ethanol to obtain a g-C3N4 dispersion. The g-C3N4 dispersion liquid and BiOI/RGO binary composite material are mixed, hydrothermally reacted, filtered, centrifuged, washed, dried and ground to obtain a BiOI/RGO/g-C3N4 composite photocatalyst.