Exploration of functional group effects on D2/H2 separation selectivity within the UiO-66 framework†

IF 6.1 1区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR
Xiufang Li, Yanxi Tan, Zhanfeng Ju, Wenjing Wang and Daqiang Yuan
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引用次数: 0

Abstract

The efficient separation of deuterium from hydrogen remains a significant challenge due to the limitations of conventional techniques, such as cryogenic distillation and the Girdler-sulfide process combined with electrolysis, which are char-acterized by substantial energy demands and relatively low separation coefficients. In contrast, the quantum sieving effect, based on porous materials, offers a promising approach to overcoming these challenges. This study presents a novel application of strong adsorption sites (μ3-OH group) within the nanoporous metal–organic framework of UiO-66 for hydrogen isotope separation. By incorporating diverse organic functional groups into UiO-66, we successfully synthesized four derivative materials: UiO-66–NH2, UiO-66–CH3, UiO-66–NO2, and UiO-66–Ph. Experimental data reveal that the introduction of these functional groups modulated the material's pore size and channel polarity, significantly impacting its adsorption and separation performance for hydrogen isotopes. Notably, UiO-66–NH2, with the smallest pore size and highest channel polarity, exhibited superior hydrogen isotope adsorption capacity and selectivity, highlighting its potential as an effective adsorbent for isotope separation.

Abstract Image

UiO-66框架下官能团对D2/H2分离选择性影响的探索
由于传统技术(如低温蒸馏和girler - sulfide工艺结合电解)的局限性,高效分离氘和氢仍然是一个重大挑战,这些技术的特点是需要大量的能量和相对较低的分离系数。相比之下,基于多孔材料的量子筛分效应为克服这些挑战提供了一种有希望的方法。本研究提出了在UiO-66纳米孔金属-有机骨架内强吸附位点(μ3-OH基团)用于氢同位素分离的新应用。通过在UiO-66中加入不同的有机官能团,我们成功合成了UiO-66- nh2、UiO-66- ch3、UiO-66- no2和UiO-66- ph四种衍生物。实验数据表明,这些官能团的引入调节了材料的孔径和通道极性,显著影响了材料对氢同位素的吸附和分离性能。值得注意的是,UiO-66-NH2具有最小的孔径和最高的通道极性,表现出优异的氢同位素吸附能力和选择性,显示了其作为同位素分离的有效吸附剂的潜力。
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来源期刊
Inorganic Chemistry Frontiers
Inorganic Chemistry Frontiers CHEMISTRY, INORGANIC & NUCLEAR-
CiteScore
10.40
自引率
7.10%
发文量
587
审稿时长
1.2 months
期刊介绍: The international, high quality journal for interdisciplinary research between inorganic chemistry and related subjects
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