表面官能化对金纳米颗粒修饰到石墨烯表面的影响

In this paper, graphene oxide was synthesized by Hummers method. And then, carboxylic acid functionalized graphene (graphene-COOH), thiol-functionalized graphene (graphene-SH) and highly dispersive graphene were prepared by chemical modification of respective groups on the graphene surface. Furthermore, we explore a solution-based approach to prepare three differently functionalized graphene-gold composites by one step chemical reduction of AuCl4- ions in functionalized graphene suspensions, where the gold nanoparticles were deposited on the functionalized graphene surface during their synthesis process. In addition, we compare the influence of surface functionalization on the growth of gold nanoparticles on graphene. Transmission electron microscopy (HR-TEM) and ultraviolet-visible (UV-Vis) spectroscopy were employed to study the effect of surface functionalities on AuNPs distribution onto the graphene surface and demonstrate the successful immobilization of AuNPs on graphene surface.