Preparation method and application of a kind of hierarchical porous metal organic framework material
A metal-organic framework and metal-organic framework technology, which is applied in the field of preparation of metal-organic framework materials with a hierarchical porous structure, can solve the problems of unstable performance of metal-organic framework materials, and the preparation method is not universal, and achieves mild conditions, Simple preparation process and stable performance
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Embodiment 1
[0033] A method for preparing a metal-organic framework material with a hierarchical porous structure, specifically comprising the following steps:
[0034] 160mg hafnium chloride (0.5mmol), 83mg terephthalic acid (0.5mmol), 18ml N,N-dimethylformamide (0.234mol), 1ml formic acid (0.026mol) and 3ml deionized water (0.167mol) Add it into the reaction kettle, stir it evenly with ultrasonic, then conduct a hydrothermal reaction at a reaction temperature of 123°C for 48 hours. After the hydrothermal reaction is completed, cool it to room temperature at a cooling rate of 2°C / min, and then centrifuge to obtain multi-stage pores For the crude metal organic framework material, at this cooling rate, the unreacted ligand can be crystallized in the form of a uniform octahedron, which is convenient for the subsequent purification of the product;
[0035] Soak the crude metal-organic framework material with a hierarchical porous structure in methanol and dichloromethane for three days, cent...
Embodiment 2
[0037] A method for preparing a metal-organic framework material with a hierarchical porous structure, specifically comprising the following steps:
[0038] 160mg hafnium chloride (0.5mmol), 83mg terephthalic acid (0.5mmol), 18ml N,N-dimethylformamide (0.234mol), 1m acetic acid (0.017mol) and 1ml deionized water (0.055mol) Add it into the reaction kettle, stir it evenly with ultrasonic, then conduct a hydrothermal reaction at a reaction temperature of 123°C for 48 hours. After the hydrothermal reaction is completed, cool it to room temperature at a cooling rate of 2°C / min, and then centrifuge to obtain multi-stage pores For the crude metal organic framework material, at this cooling rate, the unreacted ligand can be crystallized in the form of a uniform octahedron, which is convenient for the subsequent purification of the product;
[0039] Soak the crude metal-organic framework material with a hierarchical porous structure in methanol and dichloromethane for three days, centr...
Embodiment 3
[0041] A method for preparing a metal-organic framework material with a hierarchical porous structure, specifically comprising the following steps:
[0042]160mg hafnium chloride (0.5mmol), 83mg terephthalic acid (0.5mmol), 18ml N,N-dimethylformamide (0.234mol), 1m acetic acid (0.017mol) and 3ml deionized water (0.167mol) Add it into the reaction kettle, stir it evenly with ultrasonic, then conduct a hydrothermal reaction at a reaction temperature of 123°C for 48 hours. After the hydrothermal reaction is completed, cool it to room temperature at a cooling rate of 2°C / min, and then centrifuge to obtain multi-stage pores For the crude metal organic framework material, at this cooling rate, the unreacted ligand can be crystallized in the form of a uniform octahedron, which is convenient for the subsequent purification of the product;
[0043] Soak the crude metal-organic framework material with a hierarchical porous structure in methanol and dichloromethane for three days, centri...
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