Pore modification method of metal organic framework material, metal organic framework material and application of metal organic framework material
A metal-organic framework and modification method technology, applied in the field of chemical separation, can solve the problems of unfavorable large-scale application, high cost, difficult synthesis, etc., and achieve the effect of improving gas adsorption and separation performance and reducing pore size
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Embodiment 1
[0033] Example 1. Pore modification of HKUST-1
[0034] Pyrazine was dissolved in methanol to obtain a solution with a mass fraction of 5%. HKUST-1 (Stephen S.-Y. Chui, Samuel M.-F. Lo, Jonathan PH Charmant, A. Guy Orpen, Ian D. Williams. Science. 1999, 283, 1148-1150. ) Dissolve in the above solution and stir at room temperature. Among them, the stirring speed is 360 revolutions / min, and the stirring time is 12 hours. The resulting solution was heated at 70°C for 48h. Then centrifuge and collect the solid. The centrifugal speed is 10000 revolutions / min, and the centrifugal time is 5 min; and washing with methanol 5 times. The resulting solid was dried under vacuum. Among them, the vacuum degree is 0.1MPa, the temperature is 150°C, and the time is 12h.
Embodiment 2
[0035] Example 2. Pore modification of MOF-74
[0036] Pyrazine was dissolved in methanol to obtain a solution with a mass fraction of 20%. The MOF-74 (Jeffrey R. Long. Nat. Mater. 2016, 16, 845-849) prepared in advance and vacuum dried overnight at 150° C. was ground, ultrasonically dispersed in the above solution, and stirred at room temperature. Among them, the stirring speed is 360 revolutions / min, and the stirring time is 12 hours. The resulting solution was refluxed at 70°C for 48h. Then centrifuge and collect the solid. The centrifugal speed is 10000 revolutions / min, and the centrifugal time is 5 min; and washing with methanol 5 times. The resulting solid was dried under vacuum. Among them, the vacuum degree is 0.1MPa, the temperature is 150°C, and the time is 12h.
Embodiment 3
[0037] Example 3. Pore modification of MOF-74
[0038] Pyrazine was dissolved in methanol to obtain a solution with a mass fraction of 5%. The MOF-74 (Jeffrey R. Long. Nat. Mater. 2016, 16, 845-849) prepared in advance and vacuum dried overnight at 150° C. was ground, ultrasonically dispersed in the above solution, and stirred at room temperature. Among them, the stirring speed is 360 revolutions / min, and the stirring time is 12 hours. The resulting solution was refluxed at 70°C for 48h. Then centrifuge and collect the solid. The centrifugal speed is 10000 revolutions / min, and the centrifugal time is 5 min; and washing with methanol 5 times. The resulting solid was dried under vacuum. Among them, the vacuum degree is 0.1MPa, the temperature is 150°C, and the time is 12h.
[0039] figure 1 The X-ray diffraction pattern of the original MOF-74 is given, with obvious characteristic peaks. figure 2 It is the original MOF-74 nitrogen adsorption curve at 77K, showing a large specif...
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