Ashirov, TImur;
Julia Stein, Siena;
Zhang, Mengru;
Yazaydin, A Ozgur;
Antonietti, Markus;
Coskun, Ali;
(2022)
Fast light-switchable polymeric carbon nitride membranes for tunable gas separation.
Nature Communications
, 13
, Article 7299. 10.1038/s41467-022-35013-x.
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Abstract
Switchable gas separation membranes are intriguing systems for regulating the transport properties of gases. However, existing stimuli-responsive gas separation membranes suffer from either very slow response times or require high energy input for switching to occur. Accordingly, herein, we introduced light-switchable polymeric carbon nitride (pCN) gas separation membranes with fast response times prepared from melamine precursor through in-situ formation and deposition of pCN onto a porous support using chemical vapor deposition. Our systematic analysis revealed that the gas transport behavior upon light irradiation is fully governed by the polarizability of the permeating gas and its interaction with the charged pCN surface, and can be easily tuned either by controlling the power of the light and/or the duration of irradiation. We also demonstrated that gases with higher polarizabilities such as CO2 can be separated from gases with lower polarizability like H2 and He effectively with more than 22% increase in the gas/CO2 selectivity upon light irradiation. The membranes also exhibited fast response times (<1 s) and can be turned “on” and “off” using a single light source at 550 nm.
| Type: | Article |
|---|---|
| Title: | Fast light-switchable polymeric carbon nitride membranes for tunable gas separation |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s41467-022-35013-x |
| Publisher version: | https://doi.org/10.1038/s41467-022-35013-x |
| Language: | English |
| Additional information: | This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10160524 |
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