A mof-74 hybrid shell structure material and zif-90@mof-74 hybrid core-shell material
A technology of ZIF-90 and MOF-74, applied in the field of metal-organic frameworks, can solve the problems of synthetic reaction process and time-consuming, inflexible control of the size and structure of core-shell crystal materials, and increased complexity
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[0072] A first aspect of the present invention provides a method for preparing a MOF-74 hybrid shell structure material, comprising:
[0073] 1) provide ZIF-90, dissolve ZIF-90 in alcohol to form ZIF-90 alcohol suspension;
[0074] 2) providing a precursor solution comprising an organic ligand, an organic solvent, a nickel salt, water, a growth regulator, and a base;
[0075] 3) Mix the ZIF-90 alcohol suspension provided in step 1) with the precursor solution provided in step 2); prepare MOF-74 hybrid shell structure material after reacting at 80-120° C. for 3-9 min .
[0076] In the preparation method of the MOF-74 hybrid shell structure material provided by the present invention, in the step 1), ZIF-90 is provided, and ZIF-90 is dissolved in alcohol to form a ZIF-90 alcohol suspension. In one embodiment, the preparation method of ZIF-90 includes: heating imidazole-2-carbaldehyde and polyvinylpyrrolidone in a solvent in a metal bath, and adding zinc salt to prepare it.
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Embodiment 1
[0137] 1) Synthesis of 3~4μm ZIF-90
[0138] 360 mg of imidazole-2-carbaldehyde and 37.5 mg of PVP were dissolved in 12.5 mL of deionized water, stirred and heated in a metal bath at 80 °C for complete dissolution, and cooled to 40 °C after complete dissolution. Add 1.25 mL of 0.62 mol / L zinc nitrate solution and stir on a magnetic stirrer for 10 minutes (500 rpm). The product was washed twice with ethanol, collected by centrifugation (5000 rpm / min, 5 min), and dispersed in 0.6 mL of ethanol by sonication.
[0139] 2) Synthesis of 3~4μm MOF-74 hybrid shell material
[0140] 0.688mL of 0.073mol / L 2,5-dihydroxyterephthalic acid in N,N-dimethylformamide solution, 0.45mL of 1mol / L nickel nitrate hexahydrate aqueous solution, 14.25 mL of 1mol / L nickel nitrate hexahydrate solution were successively added to the microwave reaction tube μL of acetic acid and 0.375mL of 1mol / L sodium hydroxide standard solution, the flocculent precipitate produced in the above solution was sonicated ...
Embodiment 2
[0144] 1) Synthesis of 8~9μm ZIF-90
[0145] Dissolve 720 mg of imidazole-2-carbaldehyde and 75 mg of PVP in 25 mL of deionized water, stir and heat in a metal bath at 80 °C to dissolve completely, add 1 mL of PBS buffer solution after complete dissolution, and cool to 40 °C. 2.5 mL of 0.62 mol / L zinc nitrate solution was added and stirred on a magnetic stirrer for 10 minutes (500 rpm). The product was washed twice with ethanol, collected by centrifugation (5000 rpm / min, 5 min), and dispersed in 0.6 mL of ethanol by sonication.
[0146] 2) Synthesis of 8~9μm MOF-74 hybrid shell material
[0147] 0.688mL of 0.073mol / L 2,5-dihydroxyterephthalic acid in N,N-dimethylformamide solution, 0.45mL of 1mol / L nickel nitrate hexahydrate aqueous solution, 14.25 mL of 1mol / L nickel nitrate hexahydrate solution were successively added to the microwave reaction tube μL of acetic acid and 0.375mL of 1mol / L sodium hydroxide standard solution, the flocculent precipitate produced in the above s...
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