▎ 摘　　要

The graphene oxide (GO) was prepared from natural graphite by the Hummers method, and then was modified by introducing 3-glycidoxypropyltrimethoxysilane (KH-570). The functionalized graphene was subsequently prepared in the presence of hydrazine hydrate. The functionalized graphene can be stably dispersed in ethanol/H2O (9:1, V/V), acetone/H2O (9:1, V/V) or N,N-dimethyl formamide (DMF)/H2O (9:1, V/V). The samples were characterized by using Fourier Transform Infrared Spectroscopy (FTIR), Atomic Force Microscope (AFM), X-ray Photoelectron Spectroscopy (XPS) and X-ray diffraction (XRD). The results show that siloxane of KH-570 reacted with hydroxy group of graphene oxide; the disorder of functionalized graphene increased and the distance between functionalized graphene sheets decreased after the modified graphene oxide was reduced with hydrazine hydrate. Functionalized graphene were exfoliated into single layer or few-layers in DMF/H2O, and the thickness of sheets is between 1.1 nm and 2.3 nm.