1. Bimetallic metal-organic framework aerogels supported by aramid nanofibers for efficient CO2 capture.
- Author
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Zhao, Huijuan, Zhang, Liheng, Chen, Shaojuan, Zhuang, Xupin, and Zhao, Guodong
- Subjects
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CARBON sequestration , *CARBON emissions , *METAL-organic frameworks , *CARBON dioxide , *PLANT nutrition - Abstract
[Display omitted] The excessive CO 2 emission has gained global attentions due to its potential effects on climate change, plant nutrition deterioration, and human health and safety. Metal-organic frameworks (MOFs) featured with high specific surface area, adjustable pore size, and tailorable morphology have been widely applied for CO 2 capture. However, some drawbacks of poor mechanical stability and uneven distribution of mesopores limit their further applications. Herein, we demonstrate a one-step synthesis of bimetallic center framework (OSSBCF) and pore reconstruction (PRC) strategy to prepare the hierarchical porous Zn/Co-ZIF@ANF aerogels. This unique design achieves the construction of efficient gas transfer channels and creates massive micropores with abundant Lewis basic adsorption sites. Benefiting from theses merits, the bimetallic Zn/Co-ZIF@ANF aerogels demonstrate high MOFs loading mass of 47.51 wt%, high specific surface area of 686.39 m2g−1, and large porosity of 99.31 %. Moreover, the bimetallic Zn/Co-ZIF@ANF aerogels exhibit an enhanced CO 2 adsorption capacity of 5.99 mmol/g and CO 2 /N 2 adsorption selectivity of 35 at 25 °C and 1 bar. The CO 2 capacity of bimetallic Zn/Co-ZIF@ANF aerogels keep up to 95.19 % after ten cycles of CO 2 adsorption, indicating the excellent long-term recycle stability. Therefore, this study provides a promising strategy to engineer hierarchical porous bimetallic MOF aerogels toward practical CO 2 capture. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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