Separation mechanism, selectivity enhancement strategies and advanced materials for mono-/multivalent ion-selective nanofiltration membrane

Advanced Membranes Pub Date : 2022-01-01 DOI:10.1016/j.advmem.2022.100032

Dan Lu , Zhikan Yao , Lei Jiao , Misbah Waheed , Zhilin Sun , Lin Zhang

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引用次数: 42

Abstract

Mono-/multivalent ion-selective separation has become a common requirement at the water-energy nexus, including energy storage and conversion, water purification, and sustainable industrial processes. In this review, we summarize the theory of ion transport through membrane and mechanisms of selective ion separation in nanofiltration (NF) briefly. Recent advancing in improving the mono-/multivalent ion selectivity of thin-film composite (TFC) NF membrane via size sieving enhancement, electric charge property regulation and co-enhancement of size sieving and electric charge properties are concluded. What's more, three material classes—surface assembly materials, nanomaterials and biomimetic ion channels are highlighted as candidates for the preparation of ion-selective NF membranes. Lastly, design directions and critical challenges for developing high-selectivity nanofiltration membranes based on the ion-selective mechanisms are provided.

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单/多价离子选择性纳滤膜的分离机理、选择性增强策略及新型材料

单/多价离子选择分离已成为水-能源关系的共同要求，包括能量储存和转换，水净化和可持续工业过程。本文综述了纳滤中离子通过膜的传输理论和离子选择性分离的机理。综述了近年来在提高薄膜复合膜(TFC)纳滤膜的单价/多价离子选择性方面的研究进展，包括增强筛分性能、调节电荷性能以及增强筛分和电荷性能的共同作用。其中，表面组装材料、纳米材料和仿生离子通道是制备离子选择性纳滤膜的候选材料。最后，提出了基于离子选择机制的高选择性纳滤膜的设计方向和面临的关键挑战。

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来源期刊

Advanced Membranes

CiteScore

8.50

自引率

0.00%

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