▎ 摘　　要

AgNPs doped graphene nanosheets (Ag@GNs) nanocomposites were prepared using an environment-friendly one-pot hydrothermal method. The performance in the removal of anionic dye methyl orange (MO) onto graphene-based materials, such as graphene oxide (GO), graphene nanosheets (GNs) and Ag@GNs were investigated extensively. Ag@GNs displays a relative high adsorption capacity of 75.87 mg g(-1) at 318 K, and can be easily recycled from liquid-phase owing to the hydrophobicity of GNs. On the base of XRD, FTIR and UV-Vis analysis, the excellent ability of Ag@GNs to MO is mainly due to the high dispersion of AgNPs, which can result in strong pi-pi interactions, electrostatic interactions between the dye molecules and GNs. Furthermore, SEM results show that the doped AgNPs effectively avid the aggregation of GNs, which is necessary for the adsorption of MO molecules. Finally, the kinetics, isotherm and thermodynamics results demonstrate that the adsorption of MO on Ag@GNs are mainly controlled by chemisorption and endothermic in nature, which matches well with Langmuir isotherm model and kinetic data reveal a good correlation to a pseudo-second-order equation.