Monolithic UiO-66-OH metal-organic gels integrating LiCl for record capture and selective separation of NH3

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2025-05-23 DOI:10.1016/j.seppur.2025.133720

Chuan Zhou , Junwei Sun , Chao Zheng , Cheng-an Tao , Li Li , Shupei Bai , Gang Fu , Xiaobing Yang , Sida Zhang , Song He

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Abstract

For ammonia (NH₃), a kind of momentous pollutant and chemical raw material, thus, developing advanced materials with outstanding NH₃ capture, storage, regeneration and separation performance are of great significance. Herein, we report the ultra-high adsorption of NH₃ up to 61.6 mmol/g at 298 K and 6 bar in a granular [email protected] metal–organic gel by anchoring LiCl in their nanopores. Notably, the record ideal adsorbed solution theory selectivity for NH₃/N₂ (3.77*10⁵) and NH₃/H₂ (1.27*10⁷) and outstanding practical selectivity for NH₃/N₂ and NH₃/H₂O can be also obtained at 298 K. Spectral measurements and theoretical calculations reveal that this record capture and selectivity performance can be attributed to the weak chemisorption of NH₃ coordination to the highly dispersed Li⁺ as well as hydrogen bonding interaction between NH₃ and Cl^- within the nanopores of the MOF.

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集成LiCl的单片UiO-66-OH金属有机凝胶，用于NH3的记录捕获和选择性分离

氨（NH3）是一种重要的污染物和化工原料，因此，开发具有优异NH3捕获、储存、再生和分离性能的先进材料具有重要意义。在此，我们报道了通过锚定LiCl在颗粒状LiCl@G66-OH-35.7金属有机凝胶的纳米孔中，在298 K和6 bar的条件下，NH3的超高吸附量高达61.6 mmol/g。值得注意的是，在298 K下，对NH3/N2和NH3/H2的理想吸附溶液理论选择性分别为3.77*105和1.27*107，对NH3/N2和NH3/H2O的实际选择性也很突出。光谱测量和理论计算表明，这种记录的捕获和选择性性能可归因于NH3配位对高度分散的Li+的弱化学吸附以及MOF纳米孔内NH3和Cl-之间的氢键相互作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.