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<p>This work explores the green synthesis of ZnO nanoparticles and their subsequent use as the zinc source for constructing Zn-EDTA metal-organic frameworks (MOFs) aimed at efficient CO₂ capture. The objective is to evaluate the adsorption capacity of the resulting MOFs and optimize their structure to enhance carbon sequestration. The Zn-EDTA MOFs were synthesized via a reflux-assisted coordination process using ethylenediaminetetraacetic acid (EDTA) as a ligand. X-ray diffraction (XRD) confirmed the crystalline structure, while Fourier transform infrared spectroscopy (FTIR) identified key functional groups, verifying Zn–EDTA coordination. Nitrogen adsorption–desorption analysis (BET) revealed a surface area of 885&#xa0;m²/g, a pore volume of 0.41&#xa0;cm³/g, and an average pore diameter of 8.58 Å, supporting the material’s porosity and gas adsorption potential. CO₂ uptake tests showed a capture capacity of 164.58 mL/g, highlighting the promise of this green-synthesized MOF for sustainable carbon capture applications.</p>

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Green Synthesis of Zn-EDTA Metal-Organic Frameworks for Enhanced CO₂ Capture: A Sustainable Approach to Carbon Sequestration

  • 期刊论文

  • 发表日期：

    2025年8月15日

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  • Omar Ben Mya,
  • Abderrazek Aoun,
  • Djamel Barani,
  • Manel Melouli

摘要

This work explores the green synthesis of ZnO nanoparticles and their subsequent use as the zinc source for constructing Zn-EDTA metal-organic frameworks (MOFs) aimed at efficient CO₂ capture. The objective is to evaluate the adsorption capacity of the resulting MOFs and optimize their structure to enhance carbon sequestration. The Zn-EDTA MOFs were synthesized via a reflux-assisted coordination process using ethylenediaminetetraacetic acid (EDTA) as a ligand. X-ray diffraction (XRD) confirmed the crystalline structure, while Fourier transform infrared spectroscopy (FTIR) identified key functional groups, verifying Zn–EDTA coordination. Nitrogen adsorption–desorption analysis (BET) revealed a surface area of 885 m²/g, a pore volume of 0.41 cm³/g, and an average pore diameter of 8.58 Å, supporting the material’s porosity and gas adsorption potential. CO₂ uptake tests showed a capture capacity of 164.58 mL/g, highlighting the promise of this green-synthesized MOF for sustainable carbon capture applications.