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用于有效捕获微量氙和氪的自调节金属有机框架
作者:小柯机器人 发布时间:2022/1/14 15:48:31

美国北德克萨斯大学Shengqian Ma团队开发了用于有效捕获微量氙和氪的自调节金属有机框架。相关研究成果于2022年1月12日发表在《德国应用化学》。

从核后处理废气中捕获氙和氪对放射性废物的处理至关重要。尽管已经使用各种多孔材料来捕获Xe和Kr,但开发能够在极低分压下捕获Xe/Kr的高性能吸附剂(如在核后处理废气条件下)仍然具有挑战性。

该文中,研究人员报告了一种基于多重弱结合相互作用的自调节金属-有机框架,以从核后处理废气中捕获痕量Xe和Kr。通过原位单晶X射线衍射研究和理论计算,揭示了ATC-Cu的自调节行为及其机理。自调节行为使ATC-Cu在0.1bar、298 K下对Xe和Kr的吸收能力分别达到2.65和0.52 cm3 g-1,并使核后处理废气对Xe的捕获能力达到创纪录水平。

研究工作不仅提供了一种基准Xe吸附剂,而且提出了一种构建智能材料以实现高效分离的新途径。

附:英文原文

Title: Self-Adjusting Metal-Organic Framework for Efficient Capture of Trace Xenon and Krypton

Author: Zheng Niu, Ziwen Fan, Tony Pham, Gaurav Verma, Katherine A. Forrest, Brian Space, Praveen K. Thallapally, Abdullah M. Al-Enizi, Shengqian Ma

Issue&Volume: 2022-01-12

Abstract: The capture of the xenon and krypton from nuclear reprocessing off-gas is essential to the treatment of radioactive waste. Although various porous materials have been employed to capture Xe and Kr, the development of high-performance adsorbents capable of trapping Xe/Kr at very low partial pressure as in the in the nuclear reprocessing off-gas conditions remains challenging. Herein, we report a self-adjusting metal-organic framework based on multiple weak binding interactions to capture trace Xe and Kr from the nuclear reprocessing off-gas. The self-adjusting behavior of ATC-Cu and its mechanism have been visualized by the in-situ single-crystal X-ray diffraction studies and theoretical calculations. The self-adjusting behavior endows ATC-Cu unprecedented uptake capacities of 2.65 and 0.52 cm  3  g  -1  for Xe and Kr respectively at 0.1 bar and 298 K, as well as the record Xe capture capability from the nuclear reprocessing off-gas. Our work not only provides a benchmark Xe adsorbent but proposes a new route to construct smart materials for efficient separations.

DOI: 10.1002/anie.202117807

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202117807

期刊信息

Angewandte Chemie:《德国应用化学》,创刊于1887年。隶属于德国化学会,最新IF:12.959
官方网址:https://onlinelibrary.wiley.com/journal/15213773
投稿链接:https://www.editorialmanager.com/anie/default.aspx