Journal
KOREAN JOURNAL OF CHEMICAL ENGINEERING
Volume 37, Issue 7, Pages 1206-1211Publisher
KOREAN INSTITUTE CHEMICAL ENGINEERS
DOI: 10.1007/s11814-020-0548-8
Keywords
MOFs; MIL-101(Cr)-NH2; Ethylenediamine@MIL-101(Cr)-NH2; CO2 Adsorption
Funding
- Industrial University of Ho Chi Minh City, Vietnam [19.2H02]
- Basic Science Research Program through the National Research Foundation (NRF) - Ministry of Science and ICT, Republic of Korea [NRF-2019R1A2C1090693]
- Engineering Research Center of Excellence Program through the National Research Foundation (NRF) - Ministry of Science and ICT, Republic of Korea [NRF-2014R1A5A1009799]
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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 N-2 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 similar to 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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