Details
| Original language | English |
|---|---|
| Pages (from-to) | 16088-16093 |
| Number of pages | 6 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 57 |
| Issue number | 49 |
| Early online date | 5 Oct 2018 |
| Publication status | Published - 26 Nov 2018 |
Abstract
Preferred-orientation control has significant impact on the separation performance of MOF membranes. Under most conditions the preferred orientation of MOF membranes is dominated by the Van der Drift mechanism of evolutionary growth selection so that the obtained orientation may not be optimized for practical application. In this study, highly c-oriented NH2-MIL-125 membranes were prepared on porous α-alumina substrates by combining oriented seeding and controlled in-plane epitaxial growth. Dynamic air–liquid interface-assisted self-assembly of c-oriented NH2-MIL-125(Ti) seed monolayers, the use of layered TiS2 as the metal precursor, and single-mode microwave heating were crucial in ensuring the preferred c-orientation while simultaneously suppressing undesired twin growth. Owing to reduced grain boundary defects, the prepared c-oriented membranes showed an ideal H2/CO2 selectivity of 24.8, which was 6.1 times higher than that of their randomly oriented counterparts under similar operating conditions.
Keywords
- membranes, metal–organic frameworks, microwave heating, oriented growth, self-assembly
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
- General Chemistry
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In: Angewandte Chemie - International Edition, Vol. 57, No. 49, 26.11.2018, p. 16088-16093.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - In-Plane Epitaxial Growth of Highly c-Oriented NH2-MIL-125(Ti) Membranes with Superior H2/CO2 Selectivity
AU - Sun, Yanwei
AU - Liu, Yi
AU - Caro, Jürgen
AU - Guo, Xinwen
AU - Song, Chunshan
AU - Liu, Yi
N1 - Funding Information: We are grateful to the Thousand Youth Talents Program, the National Natural Science Foundation of China (21176231), the Fundamental Research Funds for the Central Universities (DUT16RC(3)103), the Qian Ren Program of China, the Pennsylvania State University, and the Technology Innovation Team of Dalian University of Technology (DUT2017TB01) for financial support.
PY - 2018/11/26
Y1 - 2018/11/26
N2 - Preferred-orientation control has significant impact on the separation performance of MOF membranes. Under most conditions the preferred orientation of MOF membranes is dominated by the Van der Drift mechanism of evolutionary growth selection so that the obtained orientation may not be optimized for practical application. In this study, highly c-oriented NH2-MIL-125 membranes were prepared on porous α-alumina substrates by combining oriented seeding and controlled in-plane epitaxial growth. Dynamic air–liquid interface-assisted self-assembly of c-oriented NH2-MIL-125(Ti) seed monolayers, the use of layered TiS2 as the metal precursor, and single-mode microwave heating were crucial in ensuring the preferred c-orientation while simultaneously suppressing undesired twin growth. Owing to reduced grain boundary defects, the prepared c-oriented membranes showed an ideal H2/CO2 selectivity of 24.8, which was 6.1 times higher than that of their randomly oriented counterparts under similar operating conditions.
AB - Preferred-orientation control has significant impact on the separation performance of MOF membranes. Under most conditions the preferred orientation of MOF membranes is dominated by the Van der Drift mechanism of evolutionary growth selection so that the obtained orientation may not be optimized for practical application. In this study, highly c-oriented NH2-MIL-125 membranes were prepared on porous α-alumina substrates by combining oriented seeding and controlled in-plane epitaxial growth. Dynamic air–liquid interface-assisted self-assembly of c-oriented NH2-MIL-125(Ti) seed monolayers, the use of layered TiS2 as the metal precursor, and single-mode microwave heating were crucial in ensuring the preferred c-orientation while simultaneously suppressing undesired twin growth. Owing to reduced grain boundary defects, the prepared c-oriented membranes showed an ideal H2/CO2 selectivity of 24.8, which was 6.1 times higher than that of their randomly oriented counterparts under similar operating conditions.
KW - membranes
KW - metal–organic frameworks
KW - microwave heating
KW - oriented growth
KW - self-assembly
UR - http://www.scopus.com/inward/record.url?scp=85056264607&partnerID=8YFLogxK
U2 - 10.1002/anie.201810088
DO - 10.1002/anie.201810088
M3 - Article
C2 - 30289580
AN - SCOPUS:85056264607
VL - 57
SP - 16088
EP - 16093
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 49
ER -