Photo-switchable smart metal-organic framework membranes with tunable and enhanced molecular sieving performance
- verfasst von
- Chuanyao Liu, Yunzhe Jiang, Chen Zhou, Jürgen Caro, Aisheng Huang
- Abstract
Developing a novel MOF membrane material with switchable separation performance is an exciting and challenging research project. In the present work, we report preparation of a new kind of light induced smart MOF membrane, i.e., Cu(AzDC)(4,4′-BPE) 0.5 membrane, which shows (i) enhanced molecular sieving performance, and (ii) is able to respond quickly to external light stimuli. Two photo-switchable moieties are addressed in the Cu(AzDC)(4,4′-BPE) 0.5 membrane: azobenzene and bis(4-pyridyl)ethylene. When the Cu(AzDC)(4,4′-BPE) 0.5 membrane is in situ irradiated with Vis and UV light, the separation factor of a H 2 /CO 2 mixture can be switched reversibly between 21.3 and 43.7. This switching effect is mainly caused by reduced CO 2 adsorption in the UV-cis state as proven by independent adsorption studies. For a steric reason, adsorption of CO 2 is limited for the UV-cis state. In full agreement with this model, the adsorption of other gases H 2 , CH 4 and N 2 as well as their permeation behaviour is not observably influenced by the trans-cis switching.
- Organisationseinheit(en)
-
Institut für Physikalische Chemie und Elektrochemie
- Externe Organisation(en)
-
East China Normal University
Chinese Academy of Sciences (CAS)
- Typ
- Artikel
- Journal
- Journal of Materials Chemistry A
- Band
- 6
- Seiten
- 24949-24955
- Anzahl der Seiten
- 7
- ISSN
- 2050-7488
- Publikationsdatum
- 28.12.2018
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Allgemeine Chemie, Erneuerbare Energien, Nachhaltigkeit und Umwelt, Allgemeine Materialwissenschaften
- Ziele für nachhaltige Entwicklung
- SDG 7 – Erschwingliche und saubere Energie
- Elektronische Version(en)
-
https://doi.org/10.1039/C8TA10541C (Zugang:
Geschlossen)
