Simultaneous enhancement of flux and selectivity of UiO-66 membranes for pervaporation via post-synthetic defect healing

IF 8.4 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science Pub Date : 2024-11-21 DOI:10.1016/j.memsci.2024.123535

Ye Liang , Bo Zhang , Langhui Wu , Kangkang Jiang , Zhi Wang , Xinlei Liu

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Abstract

Zirconium-based metal-organic framework (Zr-MOF) UiO-66 is widely recognized as an exceptional candidate for fabricating high-performance membranes owing to its rich porosity, customizable chemistry and remarkable stability. However, exploration of accessible zirconium sources for UiO-66 membrane fabrication is not enough and eliminating the undesired defects occurring during synthesis is also imperative. In this work, 1.3 μm thick UiO-66 polycrystalline membranes were successfully fabricated using ZrOCl₂·8H₂O as the sole metal source. The undesired lattice defects were controlled at a low concentration level through utilizing post-synthetic defect healing method, leading to simultaneous enhancement of flux and separation factor of UiO-66 membranes for pervaporation test as the competitive permeation between different penetrants was reduced to a large extent. The finally obtained UiO-66 membranes exhibited exceptional performance, with the separation factor of around 10,000 for alcohol/ether separation, showing good potential for applying in industrial production processes.

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通过合成后缺陷修复同时提高用于渗透蒸发的 UiO-66 膜的通量和选择性

锆基金属有机框架（Zr-MOF）UiO-66 具有丰富的孔隙率、可定制的化学性质和显著的稳定性，因此被广泛认为是制造高性能膜的理想候选材料。然而，仅探索可用于制造 UiO-66 膜的锆源是不够的，还必须消除合成过程中出现的缺陷。本研究以 ZrOCl2-8H2O 为唯一金属源，成功制备出厚度为 1.3 μm 的 UiO-66 多晶膜。通过利用合成后缺陷修复方法，将不需要的晶格缺陷控制在低浓度水平，从而在很大程度上减少了不同渗透剂之间的竞争性渗透，同时提高了 UiO-66 膜在渗透测试中的通量和分离因子。最终获得的 UiO-66 膜表现出卓越的性能，在分离酒精/乙醚时的分离因数约为 10,000，显示出应用于工业生产过程的良好潜力。

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来源期刊

Journal of Membrane Science 工程技术-高分子科学

CiteScore

17.10

自引率

17.90%

发文量

1031

审稿时长

2.5 months

期刊介绍： The Journal of Membrane Science is a publication that focuses on membrane systems and is aimed at academic and industrial chemists, chemical engineers, materials scientists, and membranologists. It publishes original research and reviews on various aspects of membrane transport, membrane formation/structure, fouling, module/process design, and processes/applications. The journal primarily focuses on the structure, function, and performance of non-biological membranes but also includes papers that relate to biological membranes. The Journal of Membrane Science publishes Full Text Papers, State-of-the-Art Reviews, Letters to the Editor, and Perspectives.