Two-dimensional membranes have attracted significant attention due to their superior characteristics, and their ability to boost both flux and selectivity have led to their reputation as potential next-generation separation membranes. Among them, emerging MXene-based membranes play significant roles in the competitive membrane-separation field. In this mini-review, we systematically discuss the assembly and separation mechanisms of these membranes. Moreover, we highlight strategies based on the crosslinking of MXene nanosheets and the construction of additional nanochannels that further enhance the permeabilities and anti-swelling properties of MXene-based membranes and meet the requirements of practical applications, such as gas-molecule sieving, ion sieving, and other small-molecule sieving. MXene nanosheets can also be used as additives that introduce specific functionalities into hybrid membranes. In addition, extended applications that use MXenes as scaffolds are also discussed.

二维膜由于其优越的特性而引起了广泛的关注，并且它们提高通量和选择性的能力使其在潜在的下一代分离膜中享有盛誉。其中，新兴的基于MXene的膜在竞争性膜分离领域中发挥着重要作用。在这个小型审查中，我们系统地讨论了这些膜的组装和分离机理。此外，我们重点介绍了基于MXene纳米片交联和构建其他纳米通道的策略，这些策略可进一步提高MXene基膜的渗透性和抗溶胀性能，并满足实际应用的要求，例如气体分子筛，离子筛，等小分子筛。MXene纳米片也可以用作将特定功能引入杂化膜的添加剂。此外，还讨论了使用MXene作为支架的扩展应用程序。