Highly Water-Permeable Metal–Organic Framework MOF-303 Membranes for Desalination

Cong, Shenzhen; Yuan, Ye; Wang, Jixiao; Wang, Zhi; Kapteijn, Freek; Liu, Xinlei

doi:10.1021/jacs.1c10192

Cited by 80 publications

(42 citation statements)

References 27 publications

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“…In the coming decades, the scarcity of clean water represents a formidable challenge with the unrestrained expansion of human activities . Accordingly, there is an immense interest in developing advanced technologies to decontaminate water and recover value-added products. − Nanofiltration (NF) technology, which shows great potential for precise selectivity on the sub-nanometer scale due to the special rejection mechanisms of size exclusion and charge repulsion, , is one of the most promising candidates for sustainable molecular sieving. , However, fixed-size channels in NF membranes faced significant challenges before they can meet the harsh separation requirements of similarly sized substances in complex systems. Precise assembly with smart materials is essential in designing next-generation membranes to meet harsh and complex separation challenges .…”

Section: Introductionmentioning

confidence: 99%

Voltage-Gated Membranes Incorporating Cucurbit[n]uril Molecular Containers for Molecular Nanofiltration

et al. 2022

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Smart voltage-gated nanofiltration membranes have enormous potential for on-demand and precise separation of similar molecules, which is an essential element of sustainable water purification and resource recovery. However, the existing voltage-gated membranes are hampered by limited selectivity, stability, and scalability due to electroactive monomer dimerization. Here, for the first time, the host–guest recognition properties of cucurbit[7]uril (CB[7]) are used to protect the viologen derivatives and promote their assembly into the membrane by interfacial polymerization. Viologen functions as a voltage switch, whereas CB[7] complexation prevents its dimerization and improves its redox stability. The inhibited diffusion of the CB[7]-viologen complex enables the precise patterning of the surface structure. The resultant voltage-gated membrane displays 80% improved rejection performance, excellent recovery accuracy for similar molecules, and anti-fouling properties. This work not only provides an innovative strategy for the preparation of voltage-gated smart nanofiltration membranes but also opens up new avenues for ion-selective transmission in water treatment, bionic ion channels, and energy conversion.

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Section: Introductionmentioning

confidence: 99%

Voltage-Gated Membranes Incorporating Cucurbit[n]uril Molecular Containers for Molecular Nanofiltration

et al. 2022

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“…For the preparation of MOF nanosheet-based films, the deposition of MOF nanosheets on porous substrates and the incorporation of MOF nanosheets into polymers are the two main approaches so far. Cong and co-workers [28] fabricated continuous polycrystalline MOF-303 films on porous α-Al 2 O 3 discs via an in situ hydrothermal synthesis method (Figure 2a-c). The surface of the MOF-303 membrane is well-intergrown crystals without obvious cracks.…”

Section: Mofmentioning

confidence: 99%

A Review of Advancing Two-Dimensional Material Membranes for Ultrafast and Highly Selective Liquid Separation

Zhang

Zheng

Yu³

et al. 2022

Nanomaterials

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Membrane-based nanotechnology possesses high separation efficiency, low economic and energy consumption, continuous operation modes and environmental benefits, and has been utilized in various separation fields. Two-dimensional nanomaterials (2DNMs) with unique atomic thickness have rapidly emerged as ideal building blocks to develop high-performance separation membranes. By rationally tailoring and precisely controlling the nanochannels and/or nanoporous apertures of 2DNMs, 2DNM-based membranes are capable of exhibiting unprecedentedly high permeation and selectivity properties. In this review, the latest breakthroughs in using 2DNM-based membranes as nanosheets and laminar membranes are summarized, including their fabrication, structure design, transport behavior, separation mechanisms, and applications in liquid separations. Examples of advanced 2D material (graphene family, 2D TMDs, MXenes, metal–organic frameworks, and covalent organic framework nanosheets) membrane designs with remarkably perm-selective properties are highlighted. Additionally, the development of strategies used to functionalize membranes with 2DNMs are discussed. Finally, current technical challenges and emerging research directions of advancing 2DNM membranes for liquid separation are shared.

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“…Over the past decade, crystalline metal organic framework (MOF) membranes that exhibit inherently uniform and ordered sub-nanometer pores, which just located between the diameters of water molecules (0.28 nm) and common hydrated ions (≥0.66 nm), have been widely applied in water-salt separation. [7,8] Up to now, a series of continuous MOF membranes (like UiO-66, [9] MOF-303, [10] ZIF-8, [11] etc.) have been fabricated through solvothermal synthesis or layer-by-layer self-assembly and showed high rejections toward multivalent ion (≥90% for Na 2 SO 4 ).…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Interfacial Self‐Assembly toward Supramolecular Metal‐Organic Films for Water Desalination

et al. 2022

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Supramolecular metal‐organic materials are considered as the ideal candidates for membrane fabrication due to their excellent film forming characteristics, diverse metal centers and ligand sources, and designable structure and function. However, it remains challenging to rapidly construct highly permeable supramolecular metal‐organic membranes with high salt rejection. Herein, a novel ultrafast interfacial self‐assembly strategy to prepare supramolecular metal‐organic films through the strong coordination interaction between highly active 1,3,5‐triformylphloroglucinol (TFP) ligands and Fe3+, Sc3+, or Cu2+ at the organic–aqueous interface is reported. Benefiting from the self‐completing and self‐limiting characteristics of this interfacial self‐assembly, the new kind of supramolecular membrane with optimized composition can be assembled within 3.5 min and exhibits ultrathin, dense, defect‐free features, and thus shows an excellent water permeance (21.5 L m–2 h–1 bar–1) with a high Na2SO4 rejection above 95%, which outperforms almost all of the non‐polyamide membranes and commercially available nanofiltration membranes. This strong‐coordination interfacial self‐assembly method will open up a new way for the development of functional metal‐organic supramolecular films for high‐performance membrane separation and beyond.

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Highly Water-Permeable Metal–Organic Framework MOF-303 Membranes for Desalination

Cited by 80 publications

References 27 publications

Voltage-Gated Membranes Incorporating Cucurbit[n]uril Molecular Containers for Molecular Nanofiltration

Voltage-Gated Membranes Incorporating Cucurbit[n]uril Molecular Containers for Molecular Nanofiltration

A Review of Advancing Two-Dimensional Material Membranes for Ultrafast and Highly Selective Liquid Separation

Ultrafast Interfacial Self‐Assembly toward Supramolecular Metal‐Organic Films for Water Desalination

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