▎ 摘　　要

NOVELTY - The method for preparing single-layer self-supporting three-dimensional graphene nano-foam using continuous forming template method, involves mechanically mixing copper salt and organic carbon source uniformly, placing into a mold and pressing with hydraulic press to obtain a blank, then placing in a mixed gas atmosphere of two-temperature burning section and processing to obtain macroscopic three-dimensional nano-copper template having monolayer of three-dimensional graphene grown on its surface, using corrosive liquid to etch copper substrate and washing. USE - Method for preparing single-layer self-supporting three-dimensional graphene nano-foam for directly use as electrode or constructed as graphene-copper composite sensor for hydrogen peroxide detection (claimed), and used in supercapacitors and lithium batteries. ADVANTAGE - The single-layer self-supporting three-dimensional graphene nano-foam can effectively perform hydrogen peroxide detection.