Preparation method and application of Pt-carbon nitride/graphene carbon nitride tumor marker CA199 biological sensor

The invention relates to a preparation method and application of a Pt-carbon nitride/graphene carbon nitride tumor marker CA199 biological sensor, and belongs to the technical field of novel functional materials and biological sensing detection. A Pt nano particle has a good catalytic performance to hydrogen peroxide, and the great specific surface area of carbon nitride/graphene is utilized for fixedly loading the Pt nano particle on the surface of the carbon nitride/graphene to act as a marker for detecting an antibody, so that the super-flexible detection of the pancreatic cancer tumor marker CA199 is realized, and has great significance to the early diagnosis and prognosis of the tumor marker.