Bifunctionalized Metal Organic Frameworks, UiO-66-NO2-N (N = -NH2, -(OH)2, -(COOH)2), for Enhanced Adsorption and Selectivity of CO2 and N2<

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• 作者：Zana Hassan Rada ; Hussein Rasool Abid ; Hongqi Sun ; Shaobin Wang
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2015
• 出版时间：July 9, 2015
• 年：2015
• 卷：60
• 期：7
• 页码：2152-2161
• 全文大小：683K
• ISSN：1520-5134

文摘

Metal organic frameworks (MOFs), UiO-66-NO₂ and UiO-66-NO₂鈥揘 (N = -NH₂, -(OH)₂, -COOH)₂), were synthesized under solvothemal conditions using different functionalized organic linkers. The synthesized samples were further activated by solvent exchange using methanol and chloroform. All samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and N₂ adsorption/desorption. Gas adsorption of CO₂ and N₂ on all samples has been evaluated at 760 mmHg and different temperatures. It was found that UiO-66-NO₂-NH₂ by methanol or chloroform activation presented much higher CO₂ adsorption than other samples and the adsorption capacities are around (87 and 74) cm³路g^鈥? on chloroform-activated and methanol-activated samples, respectively, at 273 K and 760 mmHg. In addition, high selectivity of CO₂/N₂ has been found on chloroform-activated UiO-66-NO₂-NH₂ giving a factor of 65 while the selectivity of CO₂/N₂ is only 40 for chloroform-activated UiO-66-NO₂.