Graphene oxide (GO) has potential application in membrane separation owing to its extraordinary permeance. In this paper, the reduced graphene oxide (rGO) was synthesized by a green hydrothermal reduction method, and the rGO membranes was prepared on polyvinylidene fluoride (PVDF) supporting membranes by vacuum filtration. The interlayer structure of GO and the permeability of rGO membranes can be controlled by adjusting the reduction degree of GO through changing the hydrothermal reaction time. The disorder and defects of rGO nanosheets, the less oxygen-containing functional group and the enhanced hydrophobicity facilitate transport of water molecular in relatively smaller interlayer space owing to hydrothermal reduction. Compared with the GO membranes, the hydrothermally reduced rGO membranes showed a more excellent permeability without sacrificing rejection. The rejection of the prepared rGO membrane for Methyl blue, Congo red and Crystal violet all exceed 99%.

氧化石墨烯（GO）由于其非凡的渗透性而在膜分离中具有潜在的应用。本文采用绿色水热还原法合成了还原氧化石墨烯（rGO），并通过真空过滤在聚偏二氟乙烯（PVDF）支撑膜上制备了rGO膜。通过改变水热反应时间来调节GO的还原度，可以控制GO的层间结构和rGO膜的渗透性。rGO纳米片的无序和缺陷，较少的含氧官能团和增强的疏水性由于水热还原而促进了水分子在相对较小的层间空间中的运输。与GO膜相比，经水热还原的rGO膜显示出更出色的渗透性，而不会牺牲滤除率。制备的rGO膜对甲基蓝，刚果红和结晶紫的排斥率均超过99％。