Journal
MATERIALS RESEARCH BULLETIN
Volume 98, Issue -, Pages 308-313Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2017.10.038
Keywords
Metal-organic frameworks; UiO-66-NH2; Microwave-assisted synthesis; CO2 capture; CO2/N-2 separation
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Funding
- National Natural Science Foundation of China [21606246]
- External Cooperation Program of BIC, CAS [174433KYSB2013005]
- Ningbo Science and Technology Innovation Team [2014B81004]
- Ningbo Municipal Natural Science Foundation [2015A610055]
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In a detailed study, the influence of microwave irradiation, synthesis time and temperature, addition of acetic acid (HAc) as a modulator on the morphology, crystallinity and stability of UiO-66-NH2 is investigated to develop a reliable and reproducible strategy for the preparation of well-shaped UiO-66-NH2. The UiO-66-NH2 were characterized by powder X-ray diffraction (PXRD), field emission scanning electron microscopy (FESEM), thermogravimetric analysis (TGA), and gas adsorption. It is found that well-shaped UiO-66-NH2 with a high CO2 adsorption capacity can be synthesized in a short time by microwave heating. The UiO-66-NH2 crystals synthesized by microwave heating are of high quality and show a superior CO2 adsorption capacity (5.8 mmol/g at 273k and 1 bar) due to the strong interactions between the -NH2 group and CO2. The CO2/N-2 selectivity of the obtained UiO-66-NH2 at 298 K and 1 bar is 66, which is much higher than that of the pristine UiO-66 of 17.8.
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