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Mixed matrix membranes containing composite nanosheets with three-dimensional nanopores for efficient CO2 separation
Highlights MMMs were fabricated by incorporating composite nanosheets with 3D nanopores. The interconnected 3D nanopores of nanosheets provided high selective channels for CO2 transport. The composite nanosheets acted as ultrafast CO2 transport freeways in MMMs. MMMs possessed superior separation performances and overcome trade-off effect.
Abstract Novel composite nanosheets with three-dimensional (3D) nanopores were used as nanofillers and filled in Pebax® MH 1657 (Pebax) matrix to fabricate mixed matrix membranes (MMMs) for highly efficient CO2/CH4 separation. The nanosheets were formed by anchoring zeolite imidazolate framework-8 (ZIF-8) on the surface of the porous graphitic carbon nitride (g-C3N4). For the composite nanosheets of ZIF-8/g-C3N4, the interconnected 3D nanopores of ZIF-8 on composite nanosheets provided high selective nanochannels in MMMs, thereby improving CO2/CH4 selectivity. Meanwhile, the randomly arranged nanosheets were acted as the ultrafast CO2 transport freeways in MMMs, thus enhancing CO2 permeability. The as-prepared Pebax/ZIF-8/g-C3N4 exhibited an excellent CO2 separation performance. In particular, Pebax/ZIF-8/g-C3N4–9 MMM showed the highest separation performance, which reached 553 ± 23 Barrer and 35.5 ± 0.67 for CO2 permeability and CO2/CH4 separation factor, respectively. The composite nanosheets with 3D nanopores provided an effective strategy to fabricate high-performance MMMs for gas separations.
Graphical Abstract . Display Omitted
Mixed matrix membranes containing composite nanosheets with three-dimensional nanopores for efficient CO2 separation
Highlights MMMs were fabricated by incorporating composite nanosheets with 3D nanopores. The interconnected 3D nanopores of nanosheets provided high selective channels for CO2 transport. The composite nanosheets acted as ultrafast CO2 transport freeways in MMMs. MMMs possessed superior separation performances and overcome trade-off effect.
Abstract Novel composite nanosheets with three-dimensional (3D) nanopores were used as nanofillers and filled in Pebax® MH 1657 (Pebax) matrix to fabricate mixed matrix membranes (MMMs) for highly efficient CO2/CH4 separation. The nanosheets were formed by anchoring zeolite imidazolate framework-8 (ZIF-8) on the surface of the porous graphitic carbon nitride (g-C3N4). For the composite nanosheets of ZIF-8/g-C3N4, the interconnected 3D nanopores of ZIF-8 on composite nanosheets provided high selective nanochannels in MMMs, thereby improving CO2/CH4 selectivity. Meanwhile, the randomly arranged nanosheets were acted as the ultrafast CO2 transport freeways in MMMs, thus enhancing CO2 permeability. The as-prepared Pebax/ZIF-8/g-C3N4 exhibited an excellent CO2 separation performance. In particular, Pebax/ZIF-8/g-C3N4–9 MMM showed the highest separation performance, which reached 553 ± 23 Barrer and 35.5 ± 0.67 for CO2 permeability and CO2/CH4 separation factor, respectively. The composite nanosheets with 3D nanopores provided an effective strategy to fabricate high-performance MMMs for gas separations.
Graphical Abstract . Display Omitted
Mixed matrix membranes containing composite nanosheets with three-dimensional nanopores for efficient CO2 separation
Li, Xueqin (author) / Lv, Xia (author) / Ding, Siyuan (author) / Huang, Lu (author) / Wei, Zhong (author)
2022-03-25
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2011