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Related Experiment Video

Updated: Jan 21, 2026

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

Published on: February 10, 2023

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

Yingdian He¹, Mingzhe Sun^2,3, Qinghu Zhao¹

¹Department of Chemical and Biomolecular Engineering , The University of Melbourne , Victoria 3010 , Australia.

ACS Applied Materials & Interfaces

|July 25, 2019

Summary

Researchers developed a novel core-shell metal-organic framework (MOF) for enhanced CO2/N2 separation. This material demonstrates superior selectivity and capacity, offering a new pathway for gas separation technologies.

Keywords:

CO separation core−shell gas adsorption in situ synchrotron powder X-ray diffraction metal−organic frameworks

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Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

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Area of Science:

Materials Science
Chemical Engineering
Nanotechnology

Background:

Metal-organic frameworks (MOFs) are promising porous materials for gas adsorption.
Developing MOFs with tailored structures is crucial for optimizing gas separation performance.
Existing MOFs often face limitations in achieving both high selectivity and capacity simultaneously.

Purpose of the Study:

To synthesize and characterize a novel polymorphous core-shell MOF material.
To investigate the gas adsorptive properties, specifically CO2 and N2 selectivity and capacity.
To explore the potential of core-shell MOFs for advanced gas separation applications.

Main Methods:

A general acid-solvent synergy synthesis was employed to create the core-shell MOF structure.
Unary isotherms of CO2 and N2 were conducted at 273 K (0-1 bar) to evaluate adsorption.
The synthesized MOF-S@MOF-C material underwent a 7-day exchange process.

Main Results:

The core-shell MOF (MOF-S@MOF-C) exhibited significantly enhanced CO2/N2 selectivity (32.7) and moderate CO2 capacity (2.3 mmol/g).
The performance surpasses that of the individual core (MOF-C) and shell (MOF-S) components.
Negligible N2 uptake by the outer shell of MOF-S@MOF-C was identified as the key factor for enhanced selectivity.

Conclusions:

The developed core-shell MOF structure offers a viable strategy for simultaneously achieving high adsorptive selectivity and capacity.
This study presents a new route for designing multifunctional materials for improved gas separation.
The findings highlight the potential of hierarchical MOF architectures in addressing critical separation challenges.