▎ 摘　　要

NOVELTY - The method involves dissolving thiourea in an alkaline aqueous solution to make it fully dissolve, dispersing graphene oxide in the solution prepared by S1, ultrasonically dispersing for 10-20-20 minutes to make the mixture disperse uniformly, transferring the dispersed uniformly mixed solution to a heat preservation container, using infrared laser to irradiate, cooling the solution to room temperature, centrifuging and collecting precipitate, and drying. USE - Laser preparation method for sulfonated reducing graphene oxide. ADVANTAGE - The method is simple, uses graphene oxide as precursor, thiourea as sulfur source, directly synthesizes sulfonated reducing graphene oxide under the laser treatment, sulfonation reaction is better controlled, and the reaction process has no toxic substance generation, the process is simple and environment-friendly. The method has characteristics cost, high safety coefficient and small environment hazard. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a sulfonated reducing graphene oxide. DESCRIPTION OF DRAWING(S) - The drawing shows a graphical representation of an infrared spectrogram of the sample.