▎ 摘　　要

NOVELTY - A three-dimensional graphene macroscopic body material comprises graphene and heteropoly acid. The heteropoly acid has content of 5-30 wt.%, density of 0.02-1.5 g/cm3, specific surface area of 10-800 cm2/g, and electrical conductivity of 10-1000 S/m. USE - The three-dimensional graphene macroscopic body material is used as supercapacitor electrode material and organic solvents and heavy metals adsorbent (all claimed). ADVANTAGE - The method is easy to operate, convenient and fast, only requires room temperature conditions, and has low energy consumption, high efficiency, and no heating step. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the graphene macroscopic body material comprising mixing graphene oxide with heteropoly acid aqueous solution to obtain mixed solution dispersing hydrazine hydrate, standing at room temperature to obtain graphene/heteropoly acid composite three-dimensional hydrogel, and drying.