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Research Article

Boosting C2H6/C2H4 separation via the precise electrostatic modulation of synthetic 1D channel at atomic level

Salamanti Ainiwaner1, Hengcong Huang1, Jia-Jia Zheng2( ), Fengting Li1, Xue-Tong Yang3,4, Yang-Yang Guo3,4, Fangli Yuan3,4, Ming-Shui Yao3,4( ), Yifan Gu1( )
College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China
Laboratory of Theoretical and Computational Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, China
Skate Key Laboratory of Mesoscience and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100049, China
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Graphical Abstract

The electrostatic modulation of pore surface at the atomic level can boost the C2H6/C2H4 adsorption selectivity in the one dimensioned (1-D) channels.

Abstract

The regulation of gas sorption via simple pore modification is crucial to molecular recognition and chemical separation. Herein, a rational pore surface electrostatic modulation in synthetic one dimensioned (1D) channel is demonstrated to boost ethane/ethylene (C2H6/C2H4) selectivity for one-step extraction of C2H4 from C2H6/C2H4 mixtures. Through the precise modulation of the surface charge arrangement with negatively charged moieties in the 1D channel of a metal–organic framework (MOF), enhanced C2H6–host framework and decreased C2H4–host framework electrostatic interactions were obtained, which resulted in an obvious improvement in adsorption selectivity. Furthermore, the breakthrough separation performance rendered the obtained MOF an efficient adsorbent for C2H4 purification from C2H6/C2H4 mixture. The combined detail theoretical studies prove that the gas sorption selectivity is remarkably sensitive to framework electrostatic change even in the case of pore surface modification at the atomic level. These results are of fundamental importance to the design of porous materials for challenging separation tasks.

Keywords

metal–organic framework (MOF)ethane/ethylene separationethane–selective MOFadsorptionelectrostatic modulation

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Nano Research
Volume 17 Issue 11,
November 2024
Pages 10083-10087
DOI: 10.1007/s12274-024-6883-z
Cite this article:
Ainiwaner S, Huang H, Zheng J-J, et al. Boosting C2H6/C2H4 separation via the precise electrostatic modulation of synthetic 1D channel at atomic level. Nano Research, 2024, 17(11): 10083-10087. https://doi.org/10.1007/s12274-024-6883-z
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Received: 21 May 2024
Revised: 29 June 2024
Accepted: 15 July 2024
Published: 20 August 2024
© Tsinghua University Press 2024
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