将具有Xe吸附位点的纳米颗粒封装到金属有机框架中以增强Xe/Kr分离。
Encapsulation of nanoparticles with Xe adsorption sites into MOFs for enhanced Xe/Kr separation.
作者信息
Wu Chunhui, Zhou He, Wu Xiaoling, Xu Huimin, Zeng Youshi, Chu Xinxin, Liu Wei
机构信息
Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201800 China
Wuwei Institute of Advanced Energy Gansu Province 733099 China.
出版信息
RSC Adv. 2025 Aug 1;15(34):27526-27530. doi: 10.1039/d5ra03389f.
Xenon (Xe) and krypton (Kr) are important gases with significant industrial and medical applications. Metal-organic frameworks (MOFs) are a promising class of sorbent materials for Xe/Kr separation. To enhance the Xe/Kr separation performance of MOFs, we develop a strategy to encapsulate Pt nanoparticles into MOFs to introduce strong Xe adsorption sites. Xe and Kr adsorption and separation studies show that Pt@UiO-66 exhibits 21% higher Xe uptake capacity and a 7% increase in Xe/Kr selectivity compared to UiO-66 due to the introduced Xe adsorption sites, despite the Brunauer-Emmett-Teller (BET) surface area decreasing. These findings have led to an 88% extension of column breakthrough time during Xe/Kr separation under identical conditions. We further demonstrate that this approach can be extended to other MOFs with potential for Xe/Kr separation.
氙（Xe）和氪（Kr）是具有重要工业和医学应用的气体。金属有机框架（MOF）是一类很有前景的用于Xe/Kr分离的吸附剂材料。为了提高MOF对Xe/Kr的分离性能，我们开发了一种将铂纳米颗粒封装到MOF中的策略，以引入强Xe吸附位点。Xe和Kr的吸附及分离研究表明，由于引入了Xe吸附位点，尽管布鲁诺尔-埃米特-特勒（BET）表面积减小，但与UiO-66相比，Pt@UiO-66的Xe吸附容量高出21%，Xe/Kr选择性提高了7%。这些发现使得在相同条件下Xe/Kr分离过程中的柱穿透时间延长了88%。我们进一步证明，这种方法可以扩展到其他具有Xe/Kr分离潜力的MOF。
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