Gas permeation through graphdiyne-based nanoporous membranes

Zhihua Zhou, Yongtao Tan, Qian Yang, Achintya Bera, Zecheng Xiong, Mehmet Yagmurcukardes, Minsoo Kim, Yichao Zou, Guanghua Wang, Artem Mishchenko, Ivan Timokhin, Canbin Wang, Hao Wang, Chongyang Yang, Yizhen Lu, Radha Boya, Honggang Liao, Sarah Haigh, Huibiao Liu, Francois M. Peeters, Yuliang Li (), Andre K. Geim () and Sheng Hu ()
Additional contact information
Zhihua Zhou: Xiamen University
Yongtao Tan: University of Manchester
Qian Yang: University of Manchester
Achintya Bera: University of Manchester
Zecheng Xiong: Chinese Academy of Sciences
Mehmet Yagmurcukardes: Izmir Institute of Technology
Minsoo Kim: University of Manchester
Yichao Zou: University of Manchester
Guanghua Wang: Xiamen University
Artem Mishchenko: University of Manchester
Ivan Timokhin: University of Manchester
Canbin Wang: Xiamen University
Hao Wang: Xiamen University
Chongyang Yang: Xiamen University
Yizhen Lu: Xiamen University
Radha Boya: University of Manchester
Honggang Liao: Xiamen University
Sarah Haigh: University of Manchester
Huibiao Liu: Chinese Academy of Sciences
Francois M. Peeters: University of Antwerp
Yuliang Li: Chinese Academy of Sciences
Andre K. Geim: University of Manchester
Sheng Hu: Xiamen University

Nature Communications, 2022, vol. 13, issue 1, 1-6

Abstract: Abstract Nanoporous membranes based on two dimensional materials are predicted to provide highly selective gas transport in combination with extreme permeance. Here we investigate membranes made from multilayer graphdiyne, a graphene-like crystal with a larger unit cell. Despite being nearly a hundred of nanometers thick, the membranes allow fast, Knudsen-type permeation of light gases such as helium and hydrogen whereas heavy noble gases like xenon exhibit strongly suppressed flows. Using isotope and cryogenic temperature measurements, the seemingly conflicting characteristics are explained by a high density of straight-through holes (direct porosity of ∼0.1%), in which heavy atoms are adsorbed on the walls, partially blocking Knudsen flows. Our work offers important insights into intricate transport mechanisms playing a role at nanoscale.

Date: 2022
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DOI: 10.1038/s41467-022-31779-2

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