journal article·2019-08-21Open access

Effective Gas Separation Performance Enhancement Obtained by Constructing Polymorphous Core–Shell Metal–Organic Frameworks

Yingdian He, Mingzhe Sun, Qinghu Zhao, Jin Shang, Yuanmeng Tian, Penny Xiao, Qinfen Gu, Liangchun Li, Paul A. Webley

ACS Applied Materials & Interfaces· Volume 11· Issue 33

Abstract

We reported a new polymorphous core–shell metal–organic framework (MOF) in the form of a three-dimensional MOF core wrapped in a two-dimensional layered MOF shell by applying a general acid–solvent synergy synthesis. This hybrid material can achieve high adsorptive selectivity/capacity simultaneously, which is validated by the unary isotherms of CO2 and N2 conducted at 273 K (0–1 bar). The MOF-S@MOF-C with a 7-day exchange showed the highest CO2/N2 selectivity (32.7) among our samples and a moderate CO2 capacity (2.3 mmol/g), which are 3 times and 1.6 times those of the MOF-C and MOF-S, respectively. We attributed the enhanced selective adsorption performance to the negligible N2 uptake exhibited by the outer shell of MOF-S@MOF-C. This study provides a new route for elevating gas separation performance by constructing multifunctional core–shell materials.
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Research context

OpenAlex topics: Metal-Organic Frameworks: Synthesis and Applications · Covalent Organic Framework Applications · Catalytic Processes in Materials Science

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemical and Biomolecular Engineering, The University of Melbourne, Victoria 3010, Australia

School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR 999077, P. R. China

City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen 518057, P. R. China

Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, P. R. China

Australian Synchrotron (ANSTO), 800 Blackburn Road, Clayton, Victoria 3168, Australia

Funding

Research Grants Council, University Grants Committee · Australian Research Council · City University of Hong Kong · National Natural Science Foundation of China

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