Two-dimensional materials are widely used in membrane separation, but the loose distribution and severe expansion between graphene oxide (GO) nanosheets limit its application. Here, we introduce a two-dimensional MOF material into the GO membrane to enhance its water permeance and separation performance. The MOF/GO composite membrane was prepared by vacuum filtration. The MOF and GO nanosheets were tightly stacked through the π-π effect, and the shortened transmission path and enhanced pore structure greatly improved the water permeance of the composite membrane. The MOF/GO membrane exhibited a high water permeance of 56.94 L m⁻² h⁻¹ bar⁻¹. The rejection rates of methylene blue and was as methyl orange dyes were as high as 99.79% and 99.11%, respectively. At increased dye concentration, the rejection rate of methylene blue was still maintained greater than 99%. Dye rejection after 18 hours of continuous operation remains above 90%. This work provides new ideas for improving membrane separation materials. The combination of two-dimensional heterogeneous materials can result in synergistic advantages for the development of composite membranes with high water permeance and high rejection rate.

二维材料广泛应用于膜分离，但氧化石墨烯（GO）纳米片之间的松散分布和严重膨胀限制了其应用。在这里，我们将二维MOF材料引入到GO膜中以增强其透水性和分离性能。采用真空过滤法制备MOF/GO复合膜。MOF和GO纳米片通过π-π效应紧密堆叠，缩短的传输路径和增强的孔隙结构大大提高了复合膜的透水性。^{MOF/GO膜表现出56.94 L m -2} h ^-1 bar ^-1的高透水性。亚甲基蓝和甲基橙染料的截留率分别高达99.79%和99.11%。在增加染料浓度时，亚甲基蓝的截留率仍保持大于99%。连续运行18小时后脱色率仍保持在90%以上。该工作为改进膜分离材料提供了新思路。二维异质材料的组合可以为开发高透水率和高截留率的复合膜带来协同优势。