The adsorption of CO 2 by conventional liquid alkanolamine adsorbents does not meet the requirements for green-friendly development in industrial applications. In this work, we constructed NH 2 -β-CD-MOF for the first time through the amino-functionalization of the lowest-priced, readily available, and biocompatible β-CD. Subsequently, the samples were characterized by single-crystal X-ray diffraction, powder X-ray diffraction, scanning electron microscopy, differential scanning calorimetry, thermogravimetric analysis, elemental analysis, and N 2 adsorption/ desorption. The CO 2 adsorption capacity of NH 2 -β-CD-MOF was found to be 12.3 cm 3 /g, which is 10 times that of β-CD-MOF. In addition, NH 2 -β-CD-MOF has outstanding selective adsorption of CO 2 /N 2 (947.52) compared with the reported materials. The adsorption mechanism of CO 2 was analyzed by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. Furthermore, we have found that NH 2 -β-CD-MOF has better water stability relative to β-CD-MOF and γ-CD-MOF, and it can be recycled by an ultrasonic method.

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