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MOF-on-MOF Core-Shell Heterostructure With Synergistic Porous Interface for Highly Efficient Propane/Propylene

Ju Peng1,2, Zhiwei Wang2, Na Geng2

  • 1School of Chemical Engineering, Sichuan University, Chengdu, China.

Small (Weinheim an Der Bergstrasse, Germany)
|March 23, 2026
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Summary
This summary is machine-generated.

Researchers developed a novel core-shell material for separating propylene from propane. This metal-organic framework (MOF) heterostructure overcomes the typical trade-off between adsorption capacity and selectivity, enabling more energy-efficient chemical separations.

Keywords:
C3H6/C3H8 separationMOF‐on‐MOFcore–shell heterostructuredynamic selectivityinterfacial engineering

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Separation Science

Background:

  • Propylene is a vital industrial chemical, but its separation from propane/propylene mixtures is energy-intensive.
  • Conventional metal-organic frameworks (MOFs) offer tunable porosity for selective adsorption but face a capacity-selectivity trade-off.

Purpose of the Study:

  • To design and synthesize a MOF-on-MOF core-shell heterostructure for enhanced propylene/propane separation.
  • To investigate the synergistic interfacial effects in heterostructures for overcoming the capacity-selectivity limitations in MOFs.

Main Methods:

  • Fabrication of a Ni-MOF-74@ZU-609 core-shell heterostructure.
  • Characterization of the heterostructure's adsorptive and selective properties.
  • Dynamic breakthrough experiments at 298 K and 1 bar to evaluate performance.

Main Results:

  • The Ni-MOF-74@ZU-609 heterostructure demonstrated superior propylene adsorption capacity (1.14 mmol g⁻¹) and dynamic selectivity (5.51) compared to individual MOFs.
  • Synergistic effects at the interface between Ni-MOF-74 (core) and ZU-609 (shell) were identified as key to performance enhancement.
  • The interfacial engineering successfully mitigated the intrinsic capacity-selectivity trade-off.

Conclusions:

  • Precise interfacial engineering in MOF heterostructures is a viable strategy for developing high-performance gas separation materials.
  • The developed MOF-on-MOF platform offers a versatile design approach for overcoming critical limitations in chemical separations.