Preparation method of copper-based metal organic framework nanometer thin sheets and application thereof
A technology of organic framework and nano-flakes, which is applied in the field of preparation of copper-based metal-organic framework nano-flakes, can solve problems such as poor product stability, difficulty in precise control of shape/particle size, difficulty in preparing metal-organic framework nano-flakes, etc., and achieve repeatability High, uniform appearance, green and environmental protection effect in the reaction process
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Embodiment 1
[0026] 1. Preparation of Cu-MOF nanoflakes:
[0027] Step 1. Add 36mg of cuprous oxide nano cubes (average side length is 60nm) into 10mL of absolute ethanol, and ultrasonically disperse for 20min to obtain a yellow dispersion containing cuprous oxide nano cubes. The molar concentration of copper atoms 50mM;
[0028] Step 2, dissolving 83mg of terephthalic acid solid into a mixed solvent composed of 5mL of absolute ethanol and 5mL of DMF to obtain a solution containing terephthalic acid with a molar concentration of 50mM;
[0029] Step 3. Slowly add the dispersion containing cuprous oxide nanocubes to the solution containing terephthalic acid, mix thoroughly by magnetic stirring, and react at room temperature (25° C.) for 8 hours. After the reaction is completed, react to form The solid particles were centrifuged (12000rpm, 10min), washed twice with absolute ethanol, and dried in an oven at 60°C for 4h to obtain Cu-MOF nanosheets.
[0030] 2. Structural characterization:
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Embodiment 2
[0043] 1. Preparation of Cu-MOF nanoflakes:
[0044] Step 1. Add 30 mg of cuprous oxide nanospheres (average diameter is 150 nm) into a mixed solvent composed of 5 mL of absolute ethanol and 5 mL of DMF, and ultrasonically disperse for 20 minutes to obtain a yellow dispersion containing cuprous oxide nanospheres. Copper atoms The molar concentration is 42mM;
[0045] Step 2, dissolving 83mg of terephthalic acid solid into a mixed solvent composed of 5mL of absolute ethanol and 5mL of DMF to obtain a solution containing terephthalic acid with a molar concentration of 50mM;
[0046] Step 3. Slowly add the dispersion containing cuprous oxide nanospheres to the solution containing terephthalic acid, mix thoroughly by magnetic stirring, and react at 60°C for 2 hours. After the reaction is completed, pass the solid particles generated by the reaction through After centrifugation (12000 rpm, 10 min), washing with absolute ethanol twice, and oven drying at 60° C. for 4 h, Cu-MOF nano...
Embodiment 3
[0050] 1. Preparation of Cu-MOF nanoflakes:
[0051] Step 1. Add 100 mg of cuprous oxide nanospheres (average diameter is 150 nm) into a mixed solvent composed of 5 mL of absolute ethanol and 5 mL of DMF, and ultrasonically disperse for 20 minutes to obtain a yellow dispersion containing cuprous oxide nanospheres. Copper atoms The molar concentration is 140mM;
[0052] Step 2, dissolving 249 mg of terephthalic acid solids into a mixed solvent composed of 5 mL of absolute ethanol and 5 mL of DMF to obtain a solution containing terephthalic acid with a molar concentration of 150 mM;
[0053] Step 3. Slowly add the dispersion liquid containing cuprous oxide nanospheres to the solution containing terephthalic acid, mix thoroughly by magnetic stirring, and react at room temperature (25° C.) for 8 hours. After the reaction is completed, the reaction generated The solid particles were centrifuged (12000rpm, 10min), washed twice with absolute ethanol, and dried in an oven at 60°C for...
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