Heteroatom-doped noble carbon-tailored mixed matrix membranes with 
ultrapermeability for efficient CO2 separation

Tian, Zhihong; Li, Dongyang; Zheng, Weigang; Chang, Qishuo; Sang, Yudong; Lai, Feili; Wang, Jing; Zhang, Yatao; Liu, Tianxi; Antonietti, Markus

doi:10.1039/D3MH00463E

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Heteroatom-doped noble carbon-tailored mixed matrix membranes with ultrapermeability for efficient CO₂ separation

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Antonietti, Markus
Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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引用

Tian, Z., Li, D., Zheng, W., Chang, Q., Sang, Y., Lai, F., Wang, J., Zhang, Y., Liu, T., & Antonietti, M. (2023). Heteroatom-doped noble carbon-tailored mixed matrix membranes with ultrapermeability for efficient CO₂ separation. Materials Horizons, 10(9), 3660-3667. doi:10.1039/D3MH00463E.

引用: https://hdl.handle.net/21.11116/0000-000D-69BE-8

要旨

Membranes with ultrapermeability for CO₂ are desired for future large-scale carbon capture projects, because of their excellent separative productivity and economic efficiency. Herein, we demonstrate that a membrane with ultrapermeability for CO₂ can be constructed by combining N/O para-doped noble carbons, C₂N_xO_1-x, with high-permeability polymer PIM-1. The optimal PIM-1/C₂N_xO_1-x membranes exhibit superior CO₂ permeability (22110 Barrer) with a CO₂/N₂ selectivity of 15.5, and an unprecedented CO₂ permeability of 37272 Barrer can be obtained after a PEG activation treatment, far surpassing the 2008 upper bound. Both broad experiments and molecular dynamics simulations reveal that the numerous ordered polar channels of C₂N_xO_1-x and their excellent compatibility with PIM-1 are responsible for the superior CO₂ separation performance of the membrane. Although this is the first study on C₂N-type gas separation membranes, the outstanding results indicate that noble carbon building blocks may pave a new avenue to advance high-performance CO₂ separation membranes.