▎ 摘　　要

Two dimensional graphene oxide (GO) has potential application in membrane separation owing to its unique structure and physicochemical properties. In this study, the reduced graphene oxide (rGO) was synthesized from GO via hydrothermal treatment at 160 oC for 1, 2, 3 and 4 h, and the rGO membranes were prepared on cellulose nitrate supporting membranes by vacuum filtration. The structural change and chemical composition of GO were investigated using X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and contact angle measurements. The result shows that uniformly intact rGO membranes with good hydrophobicity could be achieved by adjusting the reduction degree of GO through changing the hydrothermal reaction time. The huge improvement of the hydrophobic property of rGO could be attributed to the removal of the most the hydrophilic oxygen-containing functional groups on the surface of GO. Additionally, the structure, chemical composition, and d-spacing of the GO can also be controlled by adjusting the reduction time. This method holds great potential because it can be prepared in large quantities at low cost, and suitable for applications in membrane technologies.