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Adsorption of Gases on Solids01:28

Adsorption of Gases on Solids

276
Adsorption is a process where molecules, known as the adsorbates, accumulate on a surface, which is referred to as the adsorbent or substrate. Occurring at the solid-gas interface, this phenomenon is crucial in various scientific and industrial contexts. The reverse of adsorption is desorption.Two types of adsorptions exist: physical (physisorption) and chemical (chemisorption). Physisorption involves gas molecules held to the solid's surface by relatively weak intermolecular van der Waals...
276

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Metal-Organic Frameworks for CO2 Capture: Improving Adsorption Performance Through Modification Methods.

Hongyu Pan1, Li Xu2, Tong Xu1

  • 1Laboratory of Plasma Catalysis, Dalian Maritime University, Dalian 116026, China.

Nanomaterials (Basel, Switzerland)
|April 27, 2026
PubMed
Summary
This summary is machine-generated.

Metal-organic frameworks (MOFs) show promise for carbon capture due to their tunable properties. Modifying MOFs through aperture adjustment, doping, and computational screening enhances their CO2 adsorption capacity and selectivity for industrial applications.

Keywords:
aperture adjustmentcarbon capture adsorbentsdoped metal ionsfunctional group dopingmetal-ion dopingmetal–organic frameworksmodification

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Environmental Science

Background:

  • Industrial CO2 emissions pose significant health risks, necessitating effective carbon capture methods.
  • Current technologies like chemical absorption and membrane separation face challenges including high energy costs and low efficiency.
  • Physical adsorption using advanced materials is emerging as a promising alternative for CO2 capture.

Purpose of the Study:

  • To review strategies for enhancing the CO2 adsorption performance of metal-organic frameworks (MOFs).
  • To explore how modifications like aperture adjustment, metal ion doping, functional group doping, and computational screening impact MOF performance.
  • To provide guidance for the rational design of MOF-based adsorbents for industrial carbon capture.

Main Methods:

  • Summarizing modification strategies for MOFs, including aperture adjustment, metal ion doping, and functional group doping.
  • Discussing the role of computational screening in identifying optimal MOF structures.
  • Analyzing the mechanism-dependent performance enhancements in modified MOFs.

Main Results:

  • Moderate aperture adjustment and defect engineering improve CO2 capture capacity and selectivity.
  • Doped metal ions, especially in MOF-74, enhance CO2 uptake while maintaining framework integrity.
  • Functional group doping is effective for capturing low-partial-pressure CO2, and computational screening now considers broader performance metrics.

Conclusions:

  • MOF modifications offer a pathway to improved CO2 adsorption performance.
  • Optimizing MOFs requires balancing affinity, selectivity, capacity, stability, and energy efficiency for industrial viability.
  • This review guides the rational design of MOF adsorbents for efficient carbon capture.