Abstract
Ethylenediamine (EA)-incorporated MIL-101(Cr)-NH2 adsorbents were prepared for CO2 adsorption. First, MIL-101(Cr)-NH2 was directly prepared by the solvothermal method, followed by the EA incorporation inside the pores of MIL-101(Cr)-NH2. The prepared samples were characterized by N2 porosimetry, field-emission scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectrometry, thermogravimetric, and powder X-ray diffraction analyses. The effects of ethylenediamine loading in MIL-101(Cr)-NH2 on the CO2 adsorption capability were systematically investigated. EA-incorporated MIL-101(Cr)-NH2 showed CO2 adsorption capacity of ca. 3.4 mmol/g, which was ∼62% higher than the pristine MIL-101(Cr)-NH2. In addition, the amine-grafted MOF samples showed good regenerability and stability after consecutive adsorption-desorption cycles at ambient conditions. These suggest that introduction of alkylamine molecules into the pores of metal-organic frameworks can be a promising strategy to improve the CO2 soprtion ability of MOFs.
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Acknowledgements
This work was supported by the Industrial University of Ho Chi Minh City, Vietnam (19.2H02), the Basic Science Research Program (NRF-2019R1A2C1090693) and the Engineering Research Center of Excellence Program (NRF-2014R1A5A1009799) through the National Research Foundation (NRF) funded by the Ministry of Science and ICT, Republic of Korea.
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Vo, T.K., Kim, WS. & Kim, J. Ethylenediamine-incorporated MIL-101(Cr)-NH2 metal-organic frameworks for enhanced CO2 adsorption. Korean J. Chem. Eng. 37, 1206–1211 (2020). https://doi.org/10.1007/s11814-020-0548-8
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DOI: https://doi.org/10.1007/s11814-020-0548-8