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Updated: Jun 25, 2026
08:12
Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
Published on: September 5, 2018
Trade-Off between Adsorption and Regeneration in Functional Metal-Organic Frameworks for Atmospheric Water
Mehrzad Arjmandi1, Mohamed Khayet1,2, Takeshi Matsuura3
1Department of Structure of Matter, Thermal Physics and Electronics, Faculty of Physics, University Complutense of Madrid, Avda. Complutense s/n, 28040 Madrid, Spain.
ACS Applied Materials & Interfaces
|March 4, 2026
Summary
Designing metal-organic frameworks (MOFs) for atmospheric water harvesting (AWH) requires balancing water adsorption and regeneration. This study shows how Cu-halide functionalization impacts this trade-off, guiding sustainable AWH material design.
Area of Science:
- Materials Science
- Chemical Engineering
- Environmental Science
Background:
- Developing efficient materials for atmospheric water harvesting (AWH) is crucial for addressing water scarcity.
- Metal-organic frameworks (MOFs) show promise for AWH due to their tunable structures and high surface areas.
- Optimizing the balance between water adsorption capacity and regeneration energy is key for practical MOF applications.
Purpose of the Study:
- To investigate the impact of Cu-halide functionalization (F, Cl, Br, I) on MOF-303 for atmospheric water harvesting.
- To understand the trade-off between water adsorption and regeneration efficiency in functionalized MOFs.
- To provide guidance for designing sustainable MOFs for AWH under various conditions.
Main Methods:
- Utilized a multiscale modeling framework combining Grand Canonical Monte Carlo (GCMC), Kinetic Monte Carlo (KMC), Density Functional Theory (DFT), and Molecular Dynamics (MD) simulations.
- Performed time-dependent thermodynamic analysis to evaluate water adsorption-desorption behavior.
- Validated model accuracy against existing experimental data for pristine MOF-303.
Main Results:
- Cu-F@MOF-303 demonstrated high water uptake and fast kinetics but required higher regeneration temperatures.
- Cu-Cl@MOF-303 offered a balance between moderate adsorption capacity and energy-efficient regeneration.
- Cu-Br@MOF-303 and Cu-I@MOF-303 improved low-humidity uptake but needed more energy for desorption.
- Targeted functionalization significantly influences the adsorption-regeneration performance of MOFs.
Conclusions:
- The choice of Cu-halide ligand critically affects the water adsorption-regeneration balance in MOF-303.
- Cu-Cl@MOF-303 presents a promising candidate for efficient and energy-saving atmospheric water harvesting.
- This research provides a pathway for rationally designing MOFs tailored to specific environmental conditions for sustainable water harvesting.
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