柔性氢键有机框架内的烟气脱硫和SO2回收。

IF 19.2 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nature chemistry Pub Date : 2025-05-01 Epub Date: 2025-02-26 DOI:10.1038/s41557-025-01744-9

Lin Li, Xuan Zhang, Xin Lian, Laiyu Zhang, Zhiyuan Zhang, Xiongli Liu, Tengfei He, Baiyan Li, Banglin Chen, Xian-He Bu

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引用次数: 0

摘要

从烟气中去除二氧化硫仍然是一个挑战。利用多孔材料吸附分离SO2已被认为是一种更节能、更经济的方法，可以替代传统的方法，如低温蒸馏。在这里，我们报告了一种灵活的氢键有机框架（HOF-NKU-1），它可以通过材料的客体自适应响应和形状记忆效应来筛选SO2。在环境条件下，HOF-NKU-1对SO2/CO2的分离选择性为7331，SO2在孔内的储存密度为3.27 g cm-3。HOF-NKU-1的疏水性特性即使在95%的湿度条件下也能实现高动态二氧化硫吸收和二氧化硫回收。通过组合气体吸附等温线、突破性实验和单晶衍射研究，研究了SO2/CO2的分离机理，为未来多功能形状记忆多孔材料的发展铺平了道路。

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Flue gas desulfurization and SO₂ recovery within a flexible hydrogen-bonded organic framework.

The removal of SO₂ from flue gas remains a challenge. Adsorption-based separation of SO₂ using porous materials has been proposed as a more energy-efficient and cost-effective alternative to more traditional methods such as cryogenic distillations. Here we report a flexible hydrogen-bonded organic framework (HOF-NKU-1) that enables the sieving of SO₂ through the guest-adaptive response and shape-memory effect of the material. HOF-NKU-1 exhibits a high selectivity of 7,331 for the separation of SO₂/CO₂ and a high SO₂ storage density of 3.27 g cm^-3 within the pore space at ambient conditions. The hydrophobic nature of HOF-NKU-1 enables high dynamic SO₂ uptake and SO₂ recovery, even in conditions of 95% humidity. The SO₂/CO₂ separation mechanism is studied through combinatorial gas sorption isotherms, breakthrough experiments and single-crystal diffraction studies, paving the way for the development of multifunctional shape-memory porous materials in the future.

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来源期刊

Nature chemistry 化学-化学综合

CiteScore

29.60

自引率

1.40%

发文量

226

审稿时长

1.7 months

期刊介绍： Nature Chemistry is a monthly journal that publishes groundbreaking and significant research in all areas of chemistry. It covers traditional subjects such as analytical, inorganic, organic, and physical chemistry, as well as a wide range of other topics including catalysis, computational and theoretical chemistry, and environmental chemistry. The journal also features interdisciplinary research at the interface of chemistry with biology, materials science, nanotechnology, and physics. Manuscripts detailing such multidisciplinary work are encouraged, as long as the central theme pertains to chemistry. Aside from primary research, Nature Chemistry publishes review articles, news and views, research highlights from other journals, commentaries, book reviews, correspondence, and analysis of the broader chemical landscape. It also addresses crucial issues related to education, funding, policy, intellectual property, and the societal impact of chemistry. Nature Chemistry is dedicated to ensuring the highest standards of original research through a fair and rigorous review process. It offers authors maximum visibility for their papers, access to a broad readership, exceptional copy editing and production standards, rapid publication, and independence from academic societies and other vested interests. Overall, Nature Chemistry aims to be the authoritative voice of the global chemical community.