Abstract
NH2–MIL–101(V), an amine-functionalized vanadium-based metal–organic framework (MOF) material, was successfully synthesized using a solvothermal strategy. The obtained material was characterized by X-ray diffraction (XRD), N2 adsorption–desorption isotherms, Fourier transformed infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and transmission electron microscopy (TEM) techniques. The CO2 and N2 adsorption properties of the material were measured using the Micromeritics ASAP 2020 apparatus under ambient conditions. Compared to the previously reported method for synthesizing this MOF, we performed synthesis under a lower reaction temperature. Despite this, pure-phase NH2–MIL–101(V) nanocrystals with diameters of 40–60 nm were achieved. The synthesized sample had a large specific surface area (2340 m2/g), denoting a substantial enhancement to the literature value of the corresponding analogue. In addition, the NH2–MIL–101(V) possessed a high CO2 uptake of 1.9 mmol/g at 25 °C and a pressure of 100 kPa and exhibited high CO2/N2 selectivity as well as moderate CO2 isosteric heat of adsorption.
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