Details
| Original language | English |
|---|---|
| Pages (from-to) | 20858-20862 |
| Number of pages | 5 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 59 |
| Issue number | 47 |
| Early online date | 7 Aug 2020 |
| Publication status | Published - 9 Nov 2020 |
Abstract
Control of the microstructure grain orientation, grain boundaries and thickness are crucial for MOF membranes. We report a novel synthesis strategy to prepare highly c-oriented ZIF-95 membranes through vapor-assisted in-plane epitaxial growth. In a mixed DMF/water vapor atmosphere, in-plane epitaxial growth of a ZIF-95 seeds layer was achieved to obtain an oriented and well-intergrown ZIF-95 membrane with a thickness of only 600 nm. Demonstrated by both experimental and simulation studies, the c-oriented ZIF-95 membrane displayed superior separation performance because a perfectly oriented structure resulted in a notable reduction of intercrystalline defects and transport pathways. For the separation of equimolar binary mixtures at 100 °C and 1 bar, the mixture separation factors of H2/CO2 and H2/CH4 were 32.2 and 53.7, respectively, with an H2 permeance of over 7.9×10−7 mol m−2 s−1 Pa−1, which was 4.6 times higher than that of a randomly oriented ZIF-95 membrane.
Keywords
- hydrogen separation, metal–organic frameworks membrane, molecular sieve membrane, oriented growth, ZIF-95 membranes
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
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In: Angewandte Chemie - International Edition, Vol. 59, No. 47, 09.11.2020, p. 20858-20862.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Anisotropic Gas Separation in Oriented ZIF-95 Membranes Prepared by Vapor-Assisted In-Plane Epitaxial Growth
AU - Ma, Xixi
AU - Wan, Zheng
AU - Li, Yanhong
AU - He, Xiao
AU - Caro, Jürgen
AU - Huang, Aisheng
N1 - Funding Information: Financial supports by the National Natural Science Foundation of China (21761132003, 21878100, 21922301, and 21761132022) and DFG are acknowledged.
PY - 2020/11/9
Y1 - 2020/11/9
N2 - Control of the microstructure grain orientation, grain boundaries and thickness are crucial for MOF membranes. We report a novel synthesis strategy to prepare highly c-oriented ZIF-95 membranes through vapor-assisted in-plane epitaxial growth. In a mixed DMF/water vapor atmosphere, in-plane epitaxial growth of a ZIF-95 seeds layer was achieved to obtain an oriented and well-intergrown ZIF-95 membrane with a thickness of only 600 nm. Demonstrated by both experimental and simulation studies, the c-oriented ZIF-95 membrane displayed superior separation performance because a perfectly oriented structure resulted in a notable reduction of intercrystalline defects and transport pathways. For the separation of equimolar binary mixtures at 100 °C and 1 bar, the mixture separation factors of H2/CO2 and H2/CH4 were 32.2 and 53.7, respectively, with an H2 permeance of over 7.9×10−7 mol m−2 s−1 Pa−1, which was 4.6 times higher than that of a randomly oriented ZIF-95 membrane.
AB - Control of the microstructure grain orientation, grain boundaries and thickness are crucial for MOF membranes. We report a novel synthesis strategy to prepare highly c-oriented ZIF-95 membranes through vapor-assisted in-plane epitaxial growth. In a mixed DMF/water vapor atmosphere, in-plane epitaxial growth of a ZIF-95 seeds layer was achieved to obtain an oriented and well-intergrown ZIF-95 membrane with a thickness of only 600 nm. Demonstrated by both experimental and simulation studies, the c-oriented ZIF-95 membrane displayed superior separation performance because a perfectly oriented structure resulted in a notable reduction of intercrystalline defects and transport pathways. For the separation of equimolar binary mixtures at 100 °C and 1 bar, the mixture separation factors of H2/CO2 and H2/CH4 were 32.2 and 53.7, respectively, with an H2 permeance of over 7.9×10−7 mol m−2 s−1 Pa−1, which was 4.6 times higher than that of a randomly oriented ZIF-95 membrane.
KW - hydrogen separation
KW - metal–organic frameworks membrane
KW - molecular sieve membrane
KW - oriented growth
KW - ZIF-95 membranes
UR - http://www.scopus.com/inward/record.url?scp=85090791763&partnerID=8YFLogxK
U2 - 10.1002/anie.202008260
DO - 10.1002/anie.202008260
M3 - Article
C2 - 32767658
AN - SCOPUS:85090791763
VL - 59
SP - 20858
EP - 20862
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 47
ER -