▎ 摘　　要

NOVELTY - The method for the preparation of controllable graphene-based microsphere and nanowire material involves dispersing graphene oxide into deionized water, ultrasonically treating the dispersion liquid, adding sodium polystyrene sulfonate to graphene oxide dispersion liquid to form a supramolecular assembly and ultrasonically treating to form a mixed solution (I), adding hydrazine hydrate to the mixed solution (II), filtering the mixed solution (II) with cellulose acetate membrane, quenching stable supramolecular assembly dispersion, and freeze-drying or vacuum drying. USE - Method is useful for the preparation of controllable graphene-based microsphere and nanowire material, which is useful for gas sensitive detection method (claimed). ADVANTAGE - The method ensures the preparation of controllable graphene-based microsphere and nanowire material with uniform size and large specific surface area in a simple and economical manner. DETAILED DESCRIPTION - The method for the preparation of controllable graphene-based microsphere and nanowire material involves dispersing graphene oxide into deionized water to prepare 0.5-2 mg/ml dispersion liquid, ultrasonically treating the dispersion liquid to obtain stable graphene oxide dispersion liquid for 1 hour, adding sodium polystyrene sulfonate to graphene oxide dispersion liquid in a mass ratio of 20:1 to form a supramolecular assembly and ultrasonically treating to form a mixed solution (I), adding hydrazine hydrate to the mixed solution (II), placing the mixture in an oil bath, heating at 80 degrees C to perform a reduction reaction of graphene oxide modified by polystyrene sodium sulfonate for 1 hour to form a mixed solution, where the mass ratio of hydrazine hydrate and graphene oxide is 3:1, filtering the mixed solution (II) with cellulose acetate membrane and washing, dispersing the cellulose acetate membrane into deionized water to obtain a stable supramolecular assembly dispersion, quenching stable supramolecular assembly dispersion under liquid nitrogen, and freeze-drying to obtain a graphene-based microsphere material or vacuum drying at normal temperature to obtain graphene-based nanowire material. INDEPENDENT CLAIMS are included for the following: (1) graphene-based microsphere material obtained by the above method; (2) graphene-based nanowire material obtained by the above method; and (3) use of controllable graphene-based microsphere and nanowire material for gas sensitive detection.