▎ 摘　　要

NOVELTY - Preparation of a three-dimensional (3D) graphene-based zero-valent iron nanomaterial involves preparing a 3D graphene aerogel, loading nanosized zero-valent iron, mixing the 3D graphene aerogel with a ferrous or ferric iron solution in nitrogen atmosphere to obtain a mixed solution (A), where the mass ratio of the 3D graphene to the iron is (1:1)-(1:10), adding sodium borohydride into the mixed solution (A), allowing to react for 20-40 minutes, and filtering to obtain a product (B), where the molar ratio of iron to sodium borohydride is (1:1)-(1:10), washing the product (B) with absolute ethyl alcohol, freeze-drying for 12-36 hours. USE - Preparation of three-dimensional graphene-based zero-valent iron nanomaterial used for catalytic oxidative degradation of organophosphorus pollutants by persulfate. ADVANTAGE - The method is simple, inexpensive, and efficient, and enables preparation of three-dimensional graphene-based nanosized zero-valent iron material with excellent reactivity, and high loading effect, and recycling property, and reduced secondary pollution. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) 3D graphene-based zero-valent iron nanomaterial, which is prepared by the method; and (2) use of the 3D graphene-based zero-valent iron nanomaterial in advanced oxidation technology.