Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 25463-25467 |
| Seitenumfang | 5 |
| Fachzeitschrift | Angewandte Chemie - International Edition |
| Jahrgang | 60 |
| Ausgabenummer | 48 |
| Frühes Online-Datum | 21 Sept. 2021 |
| Publikationsstatus | Veröffentlicht - 22 Nov. 2021 |
Abstract
Metal–organic framework membranes are usually prepared by in situ or secondary growth in a solution/hydrogel. The use of organic solvents may cause safety and environmental problems and produce solvent-induced defects. Here, highly oriented and permselective ZIF-95 membranes are prepared for the first time via a solvent-free secondary growth method. The solvent-free growth is not only helpful to control the membrane microstructure and thickness, but also to reduce the intercrystalline defects. In case of solvent-free growth, a perfectly oriented structure leads to an outstanding reduction of intercrystalline defects and transport resistances. For the separation of equimolar binary gas mixtures by using the highly oriented ZIF-95 membrane at 25 °C and 1 bar, the mixture separation factors of H2/CO2 and H2/CH4 are 184 and 140, respectively, with H2 permeance of over 1.9×10−7 mol m−2 s−1 Pa−1 which are much higher than those of the randomly oriented ZIF-95 membrane.
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- Katalyse
- Chemie (insg.)
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in: Angewandte Chemie - International Edition, Jahrgang 60, Nr. 48, 22.11.2021, S. 25463-25467.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Elimination of Grain Boundary Defects in Zeolitic Imidazolate Framework ZIF-95 Membrane via Solvent-Free Secondary Growth
AU - Deng, Aishan
AU - Shen, Xintian
AU - Wan, Zheng
AU - Li, Yanhong
AU - Pang, Shuyue
AU - He, Xiao
AU - Caro, Jürgen
AU - Huang, Aisheng
N1 - Funding Information: Financial supports by the National Natural Science Foundation of China (22075084, 22178117, 21878100, and 21922301), the Fundamental Research Funds for the Central Universities (40500–20101222093) are acknowledged.
PY - 2021/11/22
Y1 - 2021/11/22
N2 - Metal–organic framework membranes are usually prepared by in situ or secondary growth in a solution/hydrogel. The use of organic solvents may cause safety and environmental problems and produce solvent-induced defects. Here, highly oriented and permselective ZIF-95 membranes are prepared for the first time via a solvent-free secondary growth method. The solvent-free growth is not only helpful to control the membrane microstructure and thickness, but also to reduce the intercrystalline defects. In case of solvent-free growth, a perfectly oriented structure leads to an outstanding reduction of intercrystalline defects and transport resistances. For the separation of equimolar binary gas mixtures by using the highly oriented ZIF-95 membrane at 25 °C and 1 bar, the mixture separation factors of H2/CO2 and H2/CH4 are 184 and 140, respectively, with H2 permeance of over 1.9×10−7 mol m−2 s−1 Pa−1 which are much higher than those of the randomly oriented ZIF-95 membrane.
AB - Metal–organic framework membranes are usually prepared by in situ or secondary growth in a solution/hydrogel. The use of organic solvents may cause safety and environmental problems and produce solvent-induced defects. Here, highly oriented and permselective ZIF-95 membranes are prepared for the first time via a solvent-free secondary growth method. The solvent-free growth is not only helpful to control the membrane microstructure and thickness, but also to reduce the intercrystalline defects. In case of solvent-free growth, a perfectly oriented structure leads to an outstanding reduction of intercrystalline defects and transport resistances. For the separation of equimolar binary gas mixtures by using the highly oriented ZIF-95 membrane at 25 °C and 1 bar, the mixture separation factors of H2/CO2 and H2/CH4 are 184 and 140, respectively, with H2 permeance of over 1.9×10−7 mol m−2 s−1 Pa−1 which are much higher than those of the randomly oriented ZIF-95 membrane.
KW - elimination of membrane defects
KW - metal–organic framework membranes
KW - oriented growth
KW - solvent-free secondary growth
KW - ZIF-95 membrane
UR - http://www.scopus.com/inward/record.url?scp=85117506226&partnerID=8YFLogxK
U2 - 10.1002/anie.202110828
DO - 10.1002/anie.202110828
M3 - Article
C2 - 34549499
AN - SCOPUS:85117506226
VL - 60
SP - 25463
EP - 25467
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 48
ER -