▎ 摘　　要

NOVELTY - Preparing three-dimensional graphene sensor electrode material comprises e.g. (i) preparing three dimensional graphene on foamed aluminum substrate to obtain graphene/foam aluminum composite material, and soaking, (ii) dissolving copper nitrate in the deionized water, adding polyvinylpyrrolidone, and stirring at room temperature, three-dimensional graphene material while stirring to obtain precursor solution, transferring the frozen sample quickly into the suspension bottle of the vacuum freeze dryer, and drying for 10-20 hours, placing the vacuum freeze-dried sample in a tube furnace for carrying out calcination treatment, heating, and insulating, placing calcined sample in a stainless steel reaction vessel, adding aqueous solution of glucose, sealing and placing in the oven, maintaining at reaction temperature, performing hydrothermal reduction reaction, and naturally cooling, taking out the sample, rinsing with deionized water for many times and drying in a oven. USE - The method is useful for preparing three-dimensional graphene sensor electrode material. ADVANTAGE - The method produces product has high sensitivity. DETAILED DESCRIPTION - Preparing three-dimensional graphene sensor electrode material comprises (i) preparing three dimensional graphene on foamed aluminum substrate to obtain graphene/foam aluminum composite material, soaking the graphene/foam aluminum composite in a etching solution, and completely dissolving the aluminum foam substrate to obtain three-dimensional graphene material, where the etching solution is ferric chloride or iron nitrate solution, and the solution concentration is 0.5-5 mol/l, (ii) dissolving 0.25 pts. wt. copper nitrate in the 4.75 pts. wt. deionized water, adding 0.25 pts. wt. polyvinylpyrrolidone, and stirring at room temperature for 5-10 hours, 0.1-0.15 pts. wt. above mentiomed three-dimensional graphene material while stirring to obtain precursor solution, forming the precursor solution into a liquid crystal film having uniform thickness on the FTO by die-drawing method, slowly freezing the FTO containing the membrane of the precursor liquid phase into liquid nitrogen for 15-20 minutes, transferring the frozen sample quickly into the suspension bottle of the vacuum freeze dryer, and drying for 10-20 hours, placing the vacuum freeze-dried sample in a tube furnace for carrying out calcination treatment, heating temperature from room temperature to 450-500 degrees C at 5 degrees C/minutes, heating at 500-650 degrees C at rate of 1.5 degrees C/minutes, and insulating for 2-3 hours, placing calcined sample in a stainless steel reaction vessel, adding aqueous solution of glucose, sealing and placing in the oven, maintaining at reaction temperature of 200 degrees C for 3-4 hours, performing hydrothermal reduction reaction, and naturally cooling, taking out the sample, rinsing with deionized water for many times and drying thoroughly in a oven to obtain sensor electrode material.