▎ 摘　　要

NOVELTY - Three dimensional (3D) graphene-loaded copper nano-complex material comprises (i) dispersing graphene oxide in water to obtain graphene oxide-water dispersion, which is graphene oxide dispersion, (ii) adding copper salt into graphene oxide dispersion and dispersing uniformly to obtain the graphene oxide-cupric ion mixed solution, where the mass ratio of cupric ion to graphene oxide is 1:(20-40) and (iii) adding vitamin C into graphene oxide-cupric ion mixed solution, where the mass ratio of vitamin C to graphene oxide is 1:(10-30), ultrasonically dispersing, hydrothermally reacting at 160-200 degrees for 22-26 hours, washing to obtain gel-like solid and freeze-drying at -10 to -20 degrees C for 40-56 hours to obtain the product which is denoted as 3D-reduced graphene oxide/copper complex (3D-RGO/Cu), where the diameter of copper nanoparticles is 3-10 nm. USE - The material is useful in modified electrode. The electrode is useful for detecting glucose concentration (all claimed). DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for (1) preparing 3D graphene-loaded copper nano-complex modified electrode comprising (a) washing and drying indium tin oxide (ITO) electrode, (b) dispersing the 3DRGO/Cu in water uniformly to obtain 3D-RGO/Cu aqueous solution, adding Nafion (RTM: Perfluorinated resin solution) solution and dispersing uniformly to obtain a mixed solution, where the mass ratio of the Nafion (RTM: Perfluorinated resin solution) solution to the 3D-RGO/Cu is (4-8):1 and (c) coating the mixed solution on the surface of the ITO electrode and allowing it to dry naturally at room temperature of 20-30 degrees C; and (2) using 3D graphene-loaded copper nano-complex modified electrode for detecting glucose concentration.