用于氦分离的聚合物衬底上一维约束诱导MOF-in-COF层

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2025-03-31 DOI:10.1016/j.seppur.2025.132782

Zhou Qu , Yanni Liu , Haoran Wang , Qianxi Yang , Hongwei Fan , Hong Meng

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引用次数: 0

摘要

异质结构纳米复合膜由于其层叠孔隙的协同作用，在高级气体分离领域具有很大的应用潜力。本文报道了一种MOF（金属-有机骨架）-in-COF（共价有机骨架）层支撑在聚丙烯腈（PAN）超滤基底上，通过MOF在COF层的一维孔道内的反扩散反应制备。这种一维约束诱导膜具有独特的纳米孔中超微孔结构，在保持高速传递途径的同时加强了分子筛选。制备的ZIF-67-in-TAPB-BPDA-PAN膜具有优异的氦（He）渗透率（~ 1500 GPU），对He/N2和He/CH4的分离选择性分别提高了3.89和5.38。整体性能在已报道的he选择性膜中具有竞争力。100 h的连续气体渗透试验表明稳定性良好。这项工作将为纳米复合功能材料的工程和制备在各种分离领域的应用提供新的见解。

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One-dimensional confinement-induced MOF-in-COF layer on polymeric substrate for helium separation

Hetero-structured nanocomposite membranes have great potential in advanced gas separation due to the synergy of hierarchical pores. Herein, we report a MOF (metal–organic framework)-in-COF (covalent organic framework) layer supported on a polyacrylonitrile (PAN) ultrafiltration substrate prepared by a contra-diffusion reaction of MOF inside a one-dimensional (1D) pore-channels of COF layer. Such 1D confinement-induced membrane features a unique ultramicropore-in-nanopore structure, which intensifies the molecular sieving while preserving high-speed transfer pathways. The prepared ZIF-67-in-TAPB-BPDA-PAN membrane exhibited an excellent helium (He) permeance of ∼1500 GPU together with an enhanced separation selectivities of 3.89 for He/N₂ and 5.38 for He/CH₄, respectively. The overall performance is competitive among the reported He-selective membranes. A continuous gas permeation test for 100 h indicates good stability. This work would bring insights into the engineering and preparation of nanocomposite functional materials applied in various separation fields.

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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.