Details
| Original language | English |
|---|---|
| Pages (from-to) | 1-7 |
| Number of pages | 7 |
| Journal | Journal of membrane science |
| Volume | 559 |
| Early online date | 1 May 2018 |
| Publication status | Published - 1 Aug 2018 |
Abstract
Because of poor heterogeneous nucleation of MOF on the ceramic support surface, it is usually difficult to prepare defect-free metal-organic framework (MOF) layers as shape-selective membrane on the native ceramic supports by a direct solvothermal synthesis route. In the present work, inspired by “like dissolves like” principle, a simple and facile synthesis strategy was developed to prepare highly reproducible and permselective zeolitic imidazolate framework ZIF-8 membranes on the 1H,1H,2H,2H-perfluoroalkyltriethoxysilanes (POTS) modified α-Al2O3 disks. Attributing to the enhancement of surface hydrophobicity of the α-Al2O3 supports after POTS modification, hydrophobic ZIF-8 membranes are tending to grow well on the hydrophobic surface following the “like grows like” principle. Thus a well-intergrown ZIF-8 membrane with a thickness of about 20 µm has formed on the POTS-modified α-Al2O3 disks. The developed ZIF-8 membranes show high hydrogen selectivity and thermal stability. At 200 °C and 1 bar, the mixture separation factors of H2/CO2, H2/N2, H2/CH4, and H2/C3H8 are 15.8, 22.6, 40.6, and 549.3, with H2 permeances higher than 2.1 × 10−7 mol·m−2·s−1·Pa−1, which is promising for hydrogen separation and purification.
Keywords
- Hydrogen separation, Like grows like, Metal-organic frameworks membranes, Molecular sieve membrane, ZIF-8 membranes
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Biochemistry
- Materials Science(all)
- General Materials Science
- Chemistry(all)
- Physical and Theoretical Chemistry
- Chemical Engineering(all)
- Filtration and Separation
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In: Journal of membrane science, Vol. 559, 01.08.2018, p. 1-7.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Facile synthesis of molecular sieve membranes following “like grows like” principle
AU - Wu, Xiaocao
AU - Liu, Chuanyao
AU - Caro, Jürgen
AU - Huang, Aisheng
PY - 2018/8/1
Y1 - 2018/8/1
N2 - Because of poor heterogeneous nucleation of MOF on the ceramic support surface, it is usually difficult to prepare defect-free metal-organic framework (MOF) layers as shape-selective membrane on the native ceramic supports by a direct solvothermal synthesis route. In the present work, inspired by “like dissolves like” principle, a simple and facile synthesis strategy was developed to prepare highly reproducible and permselective zeolitic imidazolate framework ZIF-8 membranes on the 1H,1H,2H,2H-perfluoroalkyltriethoxysilanes (POTS) modified α-Al2O3 disks. Attributing to the enhancement of surface hydrophobicity of the α-Al2O3 supports after POTS modification, hydrophobic ZIF-8 membranes are tending to grow well on the hydrophobic surface following the “like grows like” principle. Thus a well-intergrown ZIF-8 membrane with a thickness of about 20 µm has formed on the POTS-modified α-Al2O3 disks. The developed ZIF-8 membranes show high hydrogen selectivity and thermal stability. At 200 °C and 1 bar, the mixture separation factors of H2/CO2, H2/N2, H2/CH4, and H2/C3H8 are 15.8, 22.6, 40.6, and 549.3, with H2 permeances higher than 2.1 × 10−7 mol·m−2·s−1·Pa−1, which is promising for hydrogen separation and purification.
AB - Because of poor heterogeneous nucleation of MOF on the ceramic support surface, it is usually difficult to prepare defect-free metal-organic framework (MOF) layers as shape-selective membrane on the native ceramic supports by a direct solvothermal synthesis route. In the present work, inspired by “like dissolves like” principle, a simple and facile synthesis strategy was developed to prepare highly reproducible and permselective zeolitic imidazolate framework ZIF-8 membranes on the 1H,1H,2H,2H-perfluoroalkyltriethoxysilanes (POTS) modified α-Al2O3 disks. Attributing to the enhancement of surface hydrophobicity of the α-Al2O3 supports after POTS modification, hydrophobic ZIF-8 membranes are tending to grow well on the hydrophobic surface following the “like grows like” principle. Thus a well-intergrown ZIF-8 membrane with a thickness of about 20 µm has formed on the POTS-modified α-Al2O3 disks. The developed ZIF-8 membranes show high hydrogen selectivity and thermal stability. At 200 °C and 1 bar, the mixture separation factors of H2/CO2, H2/N2, H2/CH4, and H2/C3H8 are 15.8, 22.6, 40.6, and 549.3, with H2 permeances higher than 2.1 × 10−7 mol·m−2·s−1·Pa−1, which is promising for hydrogen separation and purification.
KW - Hydrogen separation
KW - Like grows like
KW - Metal-organic frameworks membranes
KW - Molecular sieve membrane
KW - ZIF-8 membranes
UR - http://www.scopus.com/inward/record.url?scp=85046657891&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2018.04.053
DO - 10.1016/j.memsci.2018.04.053
M3 - Article
AN - SCOPUS:85046657891
VL - 559
SP - 1
EP - 7
JO - Journal of membrane science
JF - Journal of membrane science
SN - 0376-7388
ER -