What question did this study set out to answer?

This research aims to develop improved metal-organic frameworks for efficient carbon dioxide capture from emissions.

March 21, 2026Open Access

A Modified Approach for the Synthesis of Magnesium- and Zinc-Based Metal–Organic Frameworks for Carbon Capture: Probing the Physicochemical Properties

Key Points

This research aims to develop improved metal-organic frameworks for efficient carbon dioxide capture from emissions.
Utilized a modified solvothermal technique for synthesis of Zn and Mg MOF-74.
Characterized materials using BET surface area analysis, FTIR, XRD, SEM-EDX, and TGA.
Assessed thermal stability and structural properties of the synthesized MOFs.
Synthesized Zn and Mg MOF-74 with thermal stability up to 600 °C and 430 °C, respectively.
Low-pressure N2-BET surface areas measured at 55 m2/g for Zn and 24.73 m2/g for Mg.
Zn-MOF-74 exhibited a mesoporous structure favorable for carbon capture; however, prolonged synthesis weakened the structure.

Abstract

The urgent need to mitigate carbon dioxide (CO2) emissions from fossil-fuel-based electricity generation has driven research into advanced materials for post-combustion carbon capture. This paper presents a modified solvothermal technique to synthesize zinc (Zn) and magnesium (Mg) based MOF-74 suitable for CO2 capture from coal-fired power plants. The materials were synthesized through a solvothermal method using N,N-dimethylformamide (DMF) as the primary solvent, and subsequently characterized using Brunauer–Emmett–Teller (BET) surface area analysis, Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX), and thermogravimetric analysis (TGA). Both MOFs contained oxygen-containing functional groups and were thermally stable up to 430 °C and 600 °C respectively, making them ideal for carbon capture. The low-pressure N2-BET surface areas were 55 m2/g and 24.73 m2/g. In conclusion, the Zn material had a mesoporous structure, making it more favorable for carbon capture. It was found that prolonged synthesis time weakened the MOF structure. Future work should experimentally evaluate CO2 capture from coal-derived flue gas using Zn/Mg-MOF-74 materials, investigating adsorption behavior and kinetics through isotherm and kinetic models, while also assessing the effect of varying Zn: Mg ratios under optimized synthesis conditions.

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Cite This Study

Makuwa et al. (Wed,) studied this question.

synapsesocial.com/papers/69be3be16e48c4981c679c0a https://doi.org/https://doi.org/10.3390/pr14060967

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