Method for preparing nanometer metal oxide/graphene composite photocatalyst

The invention provides a method for preparing nanometer metal oxide/graphene composite photocatalyst in the technical field of the photocatalyst. The photocatalyst is prepared by ultrasonically dispersing graphite oxide in titanium dioxide catalytic active substance precursor solution to prepare a compound, reducing the compound through hydrazine hydrate, and drying and roasting the compound in vacuum to prepare the catalyst. By the nanometer titanium dioxide/graphene composite photocatalyst prepared by the method has greatly improved photocatalysis by controlling sintering temperature.