Boron-doped graphene/palladium nano electrochemical sensor as well as preparation method and application thereof

The invention discloses a preparation method of a boron-doped graphene/palladium nano electrochemical sensor. The preparation method is specifically implemented according to the following steps of: step 1, preparing a boron-doped graphene/palladium nano material; step 2, preparing a modification liquid: ultrasonically dispersing a solid prepared in the step 1 in deionized water to obtain the modification liquid; step 3, treating a glassy carbon electrode: taking a glassy carbon electrode, polishing the surface of the glassy carbon electrode, cleaning the glassy carbon electrode, and blow-drying the glassy carbon electrode for later use; and step 4, preparing the boron-doped graphene/palladium nano glassy carbon modified electrode: uniformly dispensing the prepared modification liquid on the surface of the glassy carbon electrode treated in the step 3, quickly putting a beaker upside down above the glassy carbon electrode, and slowly volatilizing the liquid on the surface of the glassy carbon electrode at room