Effect of the Solvent Molar Ratios on the Synthesis of Zeolitic Imidazolate Framework 8 (ZIF-8) and its Performance in CO2 Adsorption
In this research work, ZIF-8 was synthesized at room temperature using different synthesis solutions contained different molar ratios of methanol to zinc nitrate. The properties of the resultant particles were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM) and thermal gravimetric analysis (TGA). The basicity of the ZIF-8 samples was measured using temperature programmed desorption (TPD). Results showed that ZIF-8 samples synthesized in the present work were thermally stable up to 700 oC. ZIF-8 synthesized using synthesis solution contained lowest molar ratio of methanol to zinc nitrate of 86.7 possessed highest crystallinity and largest average particles sizes of ~250 nm. Besides, this sample also demonstrated highest CO2 uptake rate due to the presence of highest amount of basic site of 0.70 mmol/g among the ZIF-8 samples.
L. S. Lai et al., "Effect of the Solvent Molar Ratios on the Synthesis of Zeolitic Imidazolate Framework 8 (ZIF-8) and its Performance in CO2 Adsorption", Applied Mechanics and Materials, Vol. 625, pp. 69-72, 2014