Self-assembled two-dimensional metal–organic framework membranes as nanofluidic osmotic power generators

Su, Yuyu; Hou, Jue; Zhao, Chen; Han, Qi; Hu, Jian; Zhang, Huacheng

doi:10.1039/d4ta01350f

J. Mater. Chem. A

2024

DOI: 10.1039/d4ta01350f

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Self-assembled two-dimensional metal–organic framework membranes as nanofluidic osmotic power generators

Yuyu Su,

Jue Hou,

Chen Zhao

et al.

Abstract: Metal-organic framework (MOF) membranes with high ion selectivity and permeation rates have emerged as excellent platforms for high-performance osmotic energy harvesting. However, only a few MOFs have been successfully fabricated...

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Cited by 3 publications

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Cellulose Nanocrystal Composite Membrane Enhanced with In Situ Grown Metal–Organic Frameworks for Osmotic Energy Conversion

Wang,

Li,

Xiong

et al. 2024

Small

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Access to clean and renewable energy, osmotic energy from salinity gradient difference, for example, is central to the sustainability of human civilization. Despite numerous examples of nanofluidic membranes for osmotic energy conversion, one produced from abundant and renewable biomass resources remains largely unexplored. In this work, cotton‐derived cellulose nanocrystals (CNCs) are employed to fabricate a membrane by self‐assembly with polyvinyl alcohol (PVA) and subsequent in situ growth of metal–organic framework (MOF), UiO‐66‐(COOH)2, to provide an example. The composite membrane exhibits excellent mechanical strength and toughness due to the long chains and hydrogen bonding interactions of PVA. The incorporation of UiO‐66‐(COOH)2 endows the composite membrane with abundant nano‐ and subnano‐sized ion transport channels, resulting in a 150% increase in ion conductance, while also providing superior cation selectivity through collaboration with the sulfated CNCs. The composite membrane with 27.4% MOF content can achieve an osmotic energy conversion performance of 5.10 W m−2 under a 50‐fold KCl gradient condition and a monovalent cation selectivity of ≈16 for K+/Mg2+. This work presents a solution for harvesting renewable osmotic energy by constructing nanofluidic membranes using plentiful renewable biomass materials and a simple, low‐emission fabrication procedure.

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Cellulose Nanocrystal Composite Membrane Enhanced with In Situ Grown Metal–Organic Frameworks for Osmotic Energy Conversion

Wang,

Li,

Xiong

et al. 2024

Small

View full text Add to dashboard Cite

show abstract

Nanofluidic osmotic energy devices based on metal–organic frameworks

Yao,

Li,

Zeng

et al. 2025

Materials Science and Engineering: B

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Gradient engineering in interfacial evaporation for water, energy, and mineral harvesting

Li,

Sun,

Miao

et al. 2025

Energy Environ. Sci.

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Self-assembled two-dimensional metal–organic framework membranes as nanofluidic osmotic power generators

Abstract: Metal-organic framework (MOF) membranes with high ion selectivity and permeation rates have emerged as excellent platforms for high-performance osmotic energy harvesting. However, only a few MOFs have been successfully fabricated...

Cited by 3 publications

References 41 publications

Cellulose Nanocrystal Composite Membrane Enhanced with In Situ Grown Metal–Organic Frameworks for Osmotic Energy Conversion

Cellulose Nanocrystal Composite Membrane Enhanced with In Situ Grown Metal–Organic Frameworks for Osmotic Energy Conversion

Nanofluidic osmotic energy devices based on metal–organic frameworks

Gradient engineering in interfacial evaporation for water, energy, and mineral harvesting

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