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Updated: Jan 13, 2026
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Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
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Design of Adsorption‒Diffusion Dual-Driven MOF Membranes for Efficient CO2 Separation
Yawei Gu1, Rujing Hou1, Yizhen Situ2
1State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211816, China.
Angewandte Chemie (International Ed. in English)
|January 10, 2026
Summary
We developed a new design strategy for advanced gas separation membranes using metal-organic frameworks (MOFs). This approach enhances membrane performance by optimizing CO2 adsorption and diffusion, overcoming previous limitations.
Area of Science:
- Materials Science
- Chemical Engineering
- Nanotechnology
Background:
- Metal-organic frameworks (MOFs) show promise for gas separation membranes due to tunable pore structures.
- Current MOF membrane development faces challenges with the permeability-selectivity trade-off and inefficient screening methods.
Purpose of the Study:
- To propose and validate an adsorption-diffusion dual-driven design strategy for MOF membranes.
- To balance CO2 adsorption affinity and CO2 diffusivity selectivity for improved gas separation.
Main Methods:
- High-throughput computational screening was employed to identify suitable MOF candidates.
- Three yfm-topology MOF membranes (CAU-10H, CAU-10pydc, KMF-1) were synthesized and tested.
- Experimental membrane performance was evaluated for CO2/CH4 separation and acetylene (C2H2) permeability.
Main Results:
- CAU-10H and CAU-10pydc membranes exceeded the 2019 upper bound for CO2/CH4 separation.
- CAU-10pydc achieved high CO2 permeability (~2847 Barrer) and selectivity (185).
- Acetylene showed significantly lower permeability (39 Barrer) due to higher adsorption affinity, confirming the design principle.
Conclusions:
- The adsorption-diffusion dual-driven design strategy effectively enhances MOF membrane performance for gas separations.
- This approach provides theoretical insights and practical guidance for designing membranes for challenging gas separations.
- The synthesized MOF membranes demonstrate superior performance, outperforming many state-of-the-art materials.
