Photo-switchable smart metal-organic framework membranes with tunable and enhanced molecular sieving performance
- authored by
- 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.
- Organisation(s)
-
Institute of Physical Chemistry and Electrochemistry
- External Organisation(s)
-
East China Normal University
Chinese Academy of Sciences (CAS)
- Type
- Article
- Journal
- Journal of Materials Chemistry A
- Volume
- 6
- Pages
- 24949-24955
- No. of pages
- 7
- ISSN
- 2050-7488
- Publication date
- 28.12.2018
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- General Chemistry, Renewable Energy, Sustainability and the Environment, General Materials Science
- Sustainable Development Goals
- SDG 7 - Affordable and Clean Energy
- Electronic version(s)
-
https://doi.org/10.1039/C8TA10541C (Access:
Closed)
