Porous material and its preparation method and application
A technology of porous materials and porous structures, applied in chemical instruments and methods, other chemical processes, inorganic chemistry, etc.
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[0051] The embodiment of the present invention also provides the preparation method of the above-mentioned porous material, comprising the following steps:
[0052] S10, providing imine covalent organic framework materials;
[0053] S20, dissolving metallic lithium in a strong polar solvent to form a lithium nanocluster solution; and
[0054] S30, dispersing the imine covalent organic framework material into the lithium nanocluster solution, mixing evenly, filtering and drying.
[0055]The preparation method of the imine covalent organic framework material may include: mixing polyamino monomers, polyaldehyde monomers, catalysts and solvents for polycondensation reaction.
[0056] The polyamino monomer is preferably any one of the following structural formulas (1-1) to (1-3):
[0057]
[0058] The mass percent content of the polyamino monomer in the polycondensation reaction solution can be any value between 0.5% and 14%, for example, it can also be 0.5%, 1%, 2%, 3%, 4%, 5...
Embodiment 1
[0075] (1) Weigh 0.28g polyamino monomer formula (1-2), 0.23g polyaldehyde monomer formula (2-4), 1.05g acetic acid solution (6M), and polyamino monomer, polyaldehyde monomer The solid and acetic acid were dissolved in 10 mL of a 1:1 mixed solvent of o-dichlorobenzene and butanol, and reacted at 120°C for 12 hours. The obtained reaction product was washed 6 times with tetrahydrofuran, and then Soxhlet extracted with tetrahydrofuran for 12 hours. The unreacted monomer in the channel is removed, and the treated product is dried to obtain an imine covalent organic framework material (TPB-DMTP-COF).
[0076] Imine-based covalent organic frameworks have hexagonal macrocycles as shown below:
[0077]
[0078] (2) Put 1 mg of metal lithium flakes into 4 mL of N,N-dimethylformamide (DMF) and stir them mechanically for 2 hours to form a lithium nanocluster solution. This step was performed in a glove box under argon atmosphere.
[0079] (3) Add 50 mg of imine covalent organic fram...
Embodiment 2
[0082] (1) The same method as step (1) in Example 1 was used to prepare the same imine covalent organic framework material (TPB-DMTP-COF).
[0083] (2) Put 1.7 mg of metallic lithium flakes into 4 mL of N,N-dimethylformamide (DMF) and stir for 2 hours to form a lithium nanocluster solution. This step is performed in a glove box.
[0084] (3) Add 50 mg of imine covalent organic framework material into the lithium nanocluster solution obtained in step (2), stir for 10 min, filter with glass fiber membrane, and wash with 1-2 mL of N,N-dimethylformaldehyde Amide and THF were washed twice and dried to obtain the porous material Li 3.4wt％ / TPB-DMTP-COF. This step was also performed in a glove box.
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