A kind of preparation method of metal organic airgel
A metal-organic and aerogel technology, applied in the field of metal-organic framework materials, can solve the problems of increased cleaning steps, complicated preparation methods, and difficulty in large-scale growth of metal-organic aerogels
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[0033] The invention provides a method for preparing a metal-organic airgel, comprising the following steps:
[0034] placing the metal sheet in an aqueous organic ligand solution for hydrothermal reaction to obtain a metal organic hydrogel precursor solution;
[0035] cooling and standing the metal organic hydrogel precursor solution to obtain a metal organic hydrogel;
[0036] The metal-organic hydrogel was freeze-dried to obtain the metal-organic aerogel.
[0037] In the invention, the metal flake is placed in the organic ligand aqueous solution for hydrothermal reaction to obtain the metal organic hydrogel precursor solution. In the present invention, the organic ligand is preferably an acidic organic ligand, more preferably trimesic acid; the concentration of the organic ligand aqueous solution is preferably 0.01-0.2 mol / L, more preferably 0.1-0.2 mol / L L.
[0038] In the present invention, the organic ligand and water are preferably mixed and then ultrasonicated to ob...
Embodiment 1
[0048] (1) Add 0.42g (2mmol) of trimesic acid into 50mL of deionized water, and sonicate for 1h to obtain an aqueous solution of trimesic acid; place the aqueous solution of trimesic acid in a 100mL polytetrafluoroethylene autoclave, and High-purity cobalt metal sheets (volume 1cm×5cm×0.1cm, purity up to 99.999%) were soaked and rinsed by dilute hydrochloric acid and deionized water, respectively, and placed in a reaction kettle obliquely. Put the reaction kettle into an oven, heat it to 150°C and keep it warm for 12 hours to obtain a metal organic hydrogel precursor solution
[0049] (2) Wait for it to cool naturally to room temperature, and let it stand for 24 hours to obtain a metal-organic hydrogel material.
[0050] (3) The metal-organic hydrogel was freeze-dried at -20° C. for 48 hours to obtain a metal-organic airgel material.
[0051] The concentration of MOFs in the obtained metal-organic airgel material is 0.04mol / L, and the mass density of the obtained metal-organi...
Embodiment 2
[0060] (1) Add 2.52g (12mmol) of trimesic acid into 300mL of deionized water, and sonicate for 1h to obtain an aqueous solution of trimesic acid; place the aqueous solution of trimesic acid in a 500mL polytetrafluoroethylene autoclave, and place one The high-purity nickel metal sheet (volume 5cm×5cm×0.1cm, purity up to 99.999%) was soaked and rinsed by dilute hydrochloric acid and deionized water, respectively, and placed in the reaction kettle obliquely. Put the reaction kettle into an oven, heat it to 150°C and keep it warm for 12 hours to obtain a metal organic hydrogel precursor solution
[0061] (2) Wait for it to cool naturally to room temperature, and let it stand for 24 hours to obtain a metal-organic hydrogel material.
[0062] (3) The metal-organic hydrogel was freeze-dried at -20° C. for 72 hours to obtain a metal-organic airgel material.
[0063] The concentration of MOFs in the obtained metal-organic airgel material is 0.04mol / L, and the mass density of the obtai...
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