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Fast light-switchable polymeric carbon nitride membranes for tunable gas separation

Author

Listed:
  • Timur Ashirov

    (University of Fribourg)

  • Julya Stein Siena

    (Max Planck Institute of Colloids and Interfaces)

  • Mengru Zhang

    (University College London)

  • A. Ozgur Yazaydin

    (University College London)

  • Markus Antonietti

    (Max Planck Institute of Colloids and Interfaces)

  • Ali Coskun

    (University of Fribourg)

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 (

Suggested Citation

  • Timur Ashirov & Julya Stein Siena & Mengru Zhang & A. Ozgur Yazaydin & Markus Antonietti & Ali Coskun, 2022. "Fast light-switchable polymeric carbon nitride membranes for tunable gas separation," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-35013-x
    DOI: 10.1038/s41467-022-35013-x
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    References listed on IDEAS

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    1. Zhengbang Wang & Alexander Knebel & Sylvain Grosjean & Danny Wagner & Stefan Bräse & Christof Wöll & Jürgen Caro & Lars Heinke, 2016. "Tunable molecular separation by nanoporous membranes," Nature Communications, Nature, vol. 7(1), pages 1-7, December.
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