▎ 摘　　要

NOVELTY - Methanol is added to hydrogen auric chloride and sonicated to obtain solution (A). Silica is added to methanol, and ultrasonically processed to obtain solution (B). The obtained solution (A) and solution (B) are mixed, ultrasonically processed, and dried. The obtained product is ground to powder mixture, ignited at 800-1000 degrees C, cooled using mixture containing hydrofluoric acid, ethanol and water, and centrifuged, to obtain graphene composite gold nanoparticles. USE - Preparation of gold graphene nanocomposite used in two-photon fluorescence and Raman absorption and near infrared absorption. ADVANTAGE - The method efficiently provides gold graphene nanocomposite by simple method without affecting the environment. DETAILED DESCRIPTION - Methanol is added to hydrogen auric chloride and sonicated for 2 hours, to obtain solution (A), in which volume ratio of hydrogen auric chloride and methanol is 0.25-0.35:75-85. Silica is added to methanol, and ultrasonically processed for 2 hours, to obtain solution (B), such that volume ratio of silica and methanol is 1:75-85. The obtained solution (A) and solution (B) are mixed, ultrasonically processed for 1-2 hours, and dried after removing methanol at 75-85 degrees C. The mass ratio of hydrogen auric chloride and silica is 0.25-0.35:1. The obtained product is ground to powder mixture, ignited at 800-1000 degrees C, cooled using mixture containing hydrofluoric acid, ethanol and water, and centrifuged, to obtain graphene composite gold nanoparticles. The ratio hydrofluoric acid, ethanol and water in the mixed solution is 1.8-2.2:1:1.