Constructing CO2 capture nanotraps via tentacle-like covalent organic frameworks towards efficient CO2 separation in mixed matrix membrane

Liang, Chao; Li, Kang; Chen, Tianqi; Zhang, Yong; Yu, Jiangnan; Wang, Zhihao; Li, Haojie; Li, Xueqin

doi:10.1016/j.ces.2024.120801

Chemical Engineering Science

2025

DOI: 10.1016/j.ces.2024.120801

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Constructing CO2 capture nanotraps via tentacle-like covalent organic frameworks towards efficient CO2 separation in mixed matrix membrane

Chao Liang,

Kang Li,

Tianqi Chen

et al.

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2025

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Regulating the Positive Localized Electric Field in Mixed Matrix Membranes by Charge Reversal of ILs‐COF for Boosting CO₂ Separation

Liang,

Zhang,

et al. 2024

Adv Funct Materials

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Covalent organic frameworks (COFs), characterized by their high porosity and stability, hold great potential for applications in gas separations. However, achieving precise size sieving without hindering the gas diffusion rate is challenging. This study presents a novel approach to establishing tunable localized electric fields in COF channels to achieve efficient CO2 separation in Pebax‐based mixed matrix membranes (MMMs). Different charge densities of the localized electric field are achieved by the host–guest interaction between COF and varying charged ionic liquids (ILs). Remarkably, the MMM with a positive localized electric field attains the optimal CO2/CH4 separation performance with a significantly enhanced permeability (≈38%) and selectivity (≈99%), surpassing the Robeson upper bound. Through density functional theory (DFT) calculations, the enhanced CO2/CH4 selectivity of MMM is due to the “sieving effect” of a positive localized electric field on CO2 over CH4. Specifically, the negatively charged O atom in CO2 exhibits stronger electrostatic interaction than the positively charged H atom of CH4. Therefore, the strategy of regulating the localized electric field can be employed as an efficient design for CO2 separation in MMMs.

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Regulating the Positive Localized Electric Field in Mixed Matrix Membranes by Charge Reversal of ILs‐COF for Boosting CO₂ Separation

Liang,

Zhang,

et al. 2024

Adv Funct Materials

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Porous carbon materials for enhanced carbon dioxide capture toward post-combustion: Innovative application and future prospects

Ji,

Xu,

Chen

et al. 2025

Materials Today Energy

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Constructing CO2 capture nanotraps via tentacle-like covalent organic frameworks towards efficient CO2 separation in mixed matrix membrane

Cited by 2 publications

References 50 publications

Regulating the Positive Localized Electric Field in Mixed Matrix Membranes by Charge Reversal of ILs‐COF for Boosting CO₂ Separation

Regulating the Positive Localized Electric Field in Mixed Matrix Membranes by Charge Reversal of ILs‐COF for Boosting CO₂ Separation

Porous carbon materials for enhanced carbon dioxide capture toward post-combustion: Innovative application and future prospects

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Constructing CO2 capture nanotraps via tentacle-like covalent organic frameworks towards efficient CO2 separation in mixed matrix membrane

Cited by 2 publications

References 50 publications

Regulating the Positive Localized Electric Field in Mixed Matrix Membranes by Charge Reversal of ILs‐COF for Boosting CO2 Separation

Regulating the Positive Localized Electric Field in Mixed Matrix Membranes by Charge Reversal of ILs‐COF for Boosting CO2 Separation

Porous carbon materials for enhanced carbon dioxide capture toward post-combustion: Innovative application and future prospects

Contact Info

Product

Resources

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Regulating the Positive Localized Electric Field in Mixed Matrix Membranes by Charge Reversal of ILs‐COF for Boosting CO₂ Separation

Regulating the Positive Localized Electric Field in Mixed Matrix Membranes by Charge Reversal of ILs‐COF for Boosting CO₂ Separation