Abstract
Metal-organic frameworks (MOFs) have been recognized as promising adsorbents for carbon capture due to their ultrahigh surface areas and tunable properties. However, a majority of MOFs have strict requirements for preparation and high mass transfer resistance that limits the gas separation time. In order to improve the applicability of MOFs to practical applications, herein, we reported an experimental approach to prepare structured CuBTC/graphene aerogel (GA) composites using ionic liquid (IL) additives (CuBTC/GA-IL) at room temperature for CO2 capture. The material was characterized by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), specific surface area analysis, and CO2 adsorption tests. It was demonstrated that CuBTC/GA-IL exhibited the higher CO2 uptake than CuBTC/GA prepared without IL additives. Besides, the breakthrough experiments have shown that CuBTC/GA-IL exhibited the lower mass transfer resistance compared with CuBTC-IL and good cyclability. The effective approach of fabricating CuBTC into GA using IL additives to improve CO2 adsorption in this study may be extensively applied for other MOF-based composites.
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Abbreviations
- rGO:
-
reduced graphene oxide
- GA:
-
graphene aerogel
- ZIF:
-
zeolitic imidazolate framework
- Zr:
-
zirconium
- MIL:
-
Matériaux de l’Institut Lavoisier
- BTC:
-
benzene-1,3,5-tricarboxylate
- MOFs:
-
metal-organic frameworks
- DMF:
-
N, N-dimethylformamide
- SEM:
-
scanning electron microscopy
- PXRD:
-
powder X-ray diffractometer
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Acknowledgments
We thank the Analytical & Testing Center of Huazhong University of Science and Technology for the support.
Funding
This work was funded by the National Natural Science Foundation of China (NSFC) under Project Nos. 51836003 and 51606081.
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Wen Ren and Zhenzhen Wei are co-authors.
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Ren, W., Wei, Z., Xia, X. et al. CO2 adsorption performance of CuBTC/graphene aerogel composites. J Nanopart Res 22, 191 (2020). https://doi.org/10.1007/s11051-020-04933-4
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DOI: https://doi.org/10.1007/s11051-020-04933-4