Thermal Chemisorption and Reduction of Carbon Dioxide on UiO-66(Zr) and MIL-100(Fe)
The continuous increase in global energy consumption has caused a considerable increase in CO<sub>2</sub> emissions and environmental problems. To address these challenges, adsorbents and catalytic materials that can effectively reduce the CO<sub>2</sub> levels in the atmosph...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-03-01
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| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/15/7/479 |
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| Summary: | The continuous increase in global energy consumption has caused a considerable increase in CO<sub>2</sub> emissions and environmental problems. To address these challenges, adsorbents and catalytic materials that can effectively reduce the CO<sub>2</sub> levels in the atmosphere should be developed. Metal–organic frameworks (MOFs) have emerged as promising materials for CO<sub>2</sub> capture owing to their high surface areas and tunable structures. Herein, the CO<sub>2</sub> adsorption properties of MIL-100(Fe) and UiO-66(Zr) were investigated. Both MOFs exhibited excellent thermal stability and high CO<sub>2</sub> adsorption capacities at 300 K, and they maintained good adsorption properties at 500 K compared to those of activated carbon fiber owing to their high adsorption potentials. A slight change in the UiO-66(Zr) structure and no change in the MIL-100(Fe) structure were observed under the CO<sub>2</sub> atmosphere at 500 K. At that time, CO emissions and changes in the carboxyl and OCO functional groups were observed on MIL-100(Fe), suggesting a mechanism of CO<sub>2</sub> reduction to CO on the bare Fe(II) sites. These findings confirm the potential of MOFs for the thermo-catalytic reduction of CO<sub>2</sub> to achieve effective CO<sub>2</sub> capture and conversion. |
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| ISSN: | 2079-4991 |