离子液体是一种饱和蒸汽压低、结构可设计、稳定性强、液态温度范围宽的绿色溶剂，同时对CO2又有较高的溶解度，因此成为当前CO2分离领域的研究热点材料。将离子液体和二维纳米材料结合得到的分离膜材料兼具离子液体和二维纳米材料的优势，在气体分离方面展现了良好的应用前景。其中，离子液体和氧化石墨烯的结合备受关注。针对这一热点问题，本工作综述了国内外通过氧化石墨烯、离子液体及离子液体?氧化石墨烯膜材料在CO2分离方面的研究和进展。相关研究表明，离子液体?氧化石墨烯膜材料具有较好的CO2选择性能、渗透性能和稳定性能，是一种非常有潜力的CO2分离材料。最后，提出了利用离子液体、氧化石墨烯及离子液体?氧化石墨烯膜材料进行CO2捕集分离的未来研究挑战和展望。

Ionic liquid (IL) is a kind of green solvent with low saturated vapor pressure, good designability, strong stability, and wide liquid temperature range. Moreover, ionic liquid has high CO2 solubility, which has become a research hotspot in the field of CO2 separation. The separation membrane material obtained by combining ionic liquid and two-dimensional nanomaterials has the advantages of both ionic liquid and two-dimensional nanomaterials, which shows a good application prospect in gas separation. Among them, the combination of ionic liquid and graphene oxide (GO) has attracted much attention. In order to explore the application of ionic liquid-graphene oxide (IL-GO) membrane materials in the field of CO2 separation, this article reviews the research and progress in CO2 separation through graphene, ionic liquid and ionic liquid-graphene oxide membrane materials. From three perspectives based on IL-GO mixed matrix membrane, IL membrane supported by GO, and IL-GO composite membrane, the mechanisms in terms of selectivity, permeability, mechanical properties, thermal stability, high-pressure stability, and membrane thickness of the IL-GO membrane materials is mainly discussed. Relevant studies suggest that the IL-GO membrane materials has good selectivity, permeability mechanical properties, thermal stability, and high-pressure stability, and shows as a potential material for CO2 separation. Finally, future research challenges and prospects in CO2 capture and separation using ionic liquid, graphene oxide and IL-GO membrane materials are proposed.