Carbonate-Based Zeolitic Imidazolate Framework for Highly Selective CO2 Capture
2015-02-16T00:00:00Z (GMT)
by
In
this study, we report the formation of a new crystal structure, ZIF-CO3-1, which results from the reaction of Zn2+, 2-methylimidazole,
and carbonate. ZIF-CO3-1 can be synthesized solvothermally
in N,N-dimethylformamide (DMF)/water
(H2O) or by utilizing of CO2 gas at various
temperatures in DMF/H2O or H2O. This reaction
selectively consumes CO2 because CO2 is incorporated
in the ZIF as carbonate. CO2 can be quantitatively released
by acidifying the ZIF. Powder X-ray diffraction, single-crystal X-ray
diffraction, FTIR spectroscopy, scanning electron microscopy, elemental
analysis, and thermogravimetric analysis were used to characterize
the ZIF structure. ZIF-CO3-1 (chemical formula C9H10N4O3Zn2), crystallizes
in the orthorhombic crystal system with noncentrosymmetric space group Pba2.
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