▎ 摘　　要

NOVELTY - Method for preparing a graphene oxide photocatalytic material supporting a bismuth-based heterojunction, involves preparing BiOI / BixNbOy photocatalyst and graphene oxide, and supporting the synthesized BiOI/BixNbOy heterojunction catalyst on graphene oxide nanosheets. The supported graphene nanosheets are used as precursors, and the directional vacuum freeze-drying technology was used. The compound subjected to the pre-freezing treatment is subjected to vacuum drying treatment to obtain a graphene oxide photocatalytic material having a high strength and supported bismuth heterojunction. USE - Bismuth-based heterojunction graphene oxide photocatalytic material used to degrade plaster of paris (POPs) in water (claimed). ADVANTAGE - The bismuth-based heterojunction-supported graphene oxide photocatalytic material has high strength, high specific surface area, and strong adsorption, and can effectively solve the problem that the powdered photocatalyst is difficult to separate and recycle after use, and avoids nanomaterials issues such as secondary pollution to the environment, conducive to improve the photocatalytic reaction rate. The photocatalyst carrier separation rate of the catalyst is improved, the stability of the photocatalyst is increased, and the spectral response range is widened.