Xenon and krypton are widespread useful noble gases in commercial lighting, lasers, electronics, and medical industry. At the same time, radioactive noble gases may proliferate from used nuclear fuel and diffuse in open atmospheres. Metal organic frameworks as hotspot porous materials for gases uptake and separation are considered to be potential solutions. In this review, we comprehensively summarized recent researches on metal organic frameworks for selective capture and separation of xenon and krypton. Particularly, we followed the aspects of different optimal design strategies, including optimal pore/cage size and geometry, open metal sites, ions (anions and cations), and polar functional groups for enhancing the xenon adsorption and separation performances. Meanwhile, a comparison of each strategy and the mechanisms of xenon/krypton separation were pointed out. The separation of krypton from gases mixtures by dual-bed systems was further discussed. Finally, some existing challenges and opportunities for possible real applications were proclaimed.

氙和氪是商业照明、激光、电子和医疗行业中广泛使用的惰性气体。与此同时，放射性惰性气体可能会从用过的核燃料中扩散并扩散到开放大气中。金属有机框架作为用于气体吸收和分离的热点多孔材料被认为是潜在的解决方案。在这篇综述中，我们全面总结了近年来用于选择性捕获和分离氙和氪的金属有机框架的研究。特别是，我们遵循不同的优化设计策略的各个方面，包括最佳的孔/笼尺寸和几何形状、开放金属位点、离子（阴离子和阳离子）和极性官能团，以增强氙的吸附和分离性能。同时，指出了每种策略的比较以及氙/氪分离的机理。进一步讨论了双床系统从气体混合物中分离氪的问题。最后，宣布了一些现有的挑战和可能的实际应用的机遇。