▎ 摘　　要

NOVELTY - Preparation of graphene/polypyrrole methane composite material involves: (1) adding dichloroacetyl chloride modified graphene and 3-acylpyrrole to dichloromethane, ultrasonically dispersing, dripping concentrated hydrochloric acid and adjusting the pH-value of the mixed system; (2) adding 4-alkoxybenzaldehyde to the mixed system under nitrogen protection, ultrasonically reacting, separating, soaking, washing and drying to obtain graphene/polypyrrole methane composite material; and (3) subjecting the graphene/polypyrrole methane composite material to quinone treatment, separation, washing and drying to obtain graphene/polypyrrole composite material, namely the target product. USE - The method is useful for preparing graphene/polypyrrole methane third-order nonlinear optical composite material, which is useful in light modulator, frequency converter and all-optical switch. ADVANTAGE - The method prepares graphene/polypyrrole methane composite material with excellent film-forming property, narrow optical band gap and large third-order nonlinear optical susceptibility.