▎ 摘　　要

NOVELTY - A bifunctional bionic enzyme oxide/graphene composite material preparing method involves dissolving ferric chloride hexahydrate and polyethylenimine in potassium ferricyanide, and stirring, heating to reflux, centrifuging the resulting mixture and washing to obtain polyethylenimine coated Prussian blue nanocubes, dissolving manganese(II) sulfate and DNA in water, heating, adding tripotassium phosphate and water, and stirring to obtain DNA coated manganese(II) phosphate, placing the substrate coated with graphene oxide in the solution of polyethylenimine coated Prussian blue, shaking to obtain polyethylenimine coated Prussian blue/graphene oxide, coating polydimethylsiloxane on the polyethylenimine coated Prussian blue/graphene oxide, heating to peel the polydimethylsiloxane/polyethylenimine coated Prussian blue/graphene oxide from the substrate and attaching the DNA coated manganese(II) phosphate to the graphene oxide bare on the other side to obtain the finished product. USE - Method for preparing bifunctional bionic enzyme oxide/graphene composite material for use in sensor (claimed). DETAILED DESCRIPTION - A bifunctional bionic enzyme oxide/graphene composite material preparing method involves dissolving ferric chloride hexahydrate and polyethylenimine in potassium ferricyanide, and stirring uniformly, heating to reflux for 2-5 hours, centrifuging the resulting mixture and washing to obtain polyethylenimine coated Prussian blue nanocubes, dissolving manganese(II) sulfate and DNA in water, heating at 50-80 degrees C, adding tripotassium phosphate and water, stirring at 50-80 degrees C for 1-2 hours, after centrifugation to obtain DNA coated manganese(II) phosphate, placing the substrate coated with graphene oxide in the solution of polyethylenimine coated Prussian blue, shaking for 2-3 hours to obtain polyethylenimine coated Prussian blue/graphene oxide under the catalysis of ethylcarbodiimide hydrochloride and N-hydroxysuccinimide, coating polydimethylsiloxane on the polyethylenimine coated Prussian blue/graphene oxide, heating at 60-90 degrees C to peel the polydimethylsiloxane/polyethylenimine coated Prussian blue/graphene oxide from the substrate and attaching the DNA coated manganese(II) phosphate to the graphene oxide bare on the other side to obtain the finished product. INDEPENDENT CLAIMS are also included for the following: (1) a sensor for detecting hydrogen peroxide and oxygen, comprises an inert electrode substrate and bifunctional bionic enzyme/graphene oxide composite material, where the bifunctional bionic enzyme/graphene oxide composite material on the inert electrode substrate (2) a method for detecting hydrogen peroxide and oxygen, which involves dropping a solution to be detected into a phosphate-buffered saline base solution of the sensor to detect the electrochemical signals to evaluate the sensors selective response to hydrogen peroxide and oxygen.