Porous covalent triazine framework hollow microsphere as well as preparation method and application thereof
A technology of covalent triazine and framework, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc. The ball is not an independent hollow structure, etc., to achieve the effect of flexible and controllable preparation method, low collapse rate, and high photocatalytic hydrogen production performance
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[0052] The preparation method of porous covalent triazine frame hollow microspheres provided by the present invention includes the following steps:
[0053] (1) Preparation of seed core-shell structure: Mix the dibasic or multibasic aldehyde group or benzyl alcohol monomer and dibasic or multibasic amidine group monomer, and disperse in the template suspension. Under the condition of the catalyst, the monomer The polycondensation reaction occurs according to the stoichiometric molar ratio, the aldehyde functional group and the amidino functional group undergo a polycondensation reaction according to 1:2, and the benzyl alcohol functional group and the amidino functional group also undergo a polycondensation reaction according to 1:2. The reaction temperature is controlled, and the seed is prepared after the reaction. A suspension of a core-shell structure; the shell layer of the seed core-shell structure is a prepolymer of a binary or multiple aldehyde group or benzyl alcohol mono...
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[0073] Example 1
[0074] Prepare porous covalent triazine frame hollow microspheres, according to figure 2 Schematic diagram of the steps shown:
[0075] Follow the steps below to prepare the target product
[0076] (1) Prepare a suspension with a concentration of 12.5g / L using amino-modified silica as a template
[0077] Dissolve 1.25g of amino-modified silica in 100ml of dimethyl sulfoxide and sonicate at room temperature until the dispersion is uniform;
[0078] (2) Preparation of prefabricated seed suspension
[0079] Dissolve 0.008g of terephthalaldehyde in the above solutions and stir at 100°C for 12h;
[0080] Then add 0.028g of amidine salt and 0.120g of cesium carbonate to the above reaction system, and react at 100°C for 12h;
[0081] (3) Preparation of target core-shell structure complex
[0082] 0.0592g of terephthalaldehyde was added to the suspension prepared in step (2), and reacted at 100°C for 12h;
[0083] Then, 0.2072 g of amidine and 0.580 g of cesium carbonate were add...
Example Embodiment
[0096] Example 2
[0097] Follow the steps below to prepare the target product
[0098] (1) Prepare a suspension with a concentration of 7.5g / L with amino-modified silica as a template
[0099] Dissolve 0.75g of amino-modified silica in 100ml of dimethyl sulfoxide, sonicate at room temperature until the dispersion is uniform;
[0100] (2) Preparation of prefabricated seed suspension
[0101] Dissolve 0.008g of terephthalaldehyde in the above solutions and stir at 100°C for 12h;
[0102] Then add 0.028g of amidine salt and 0.120g of cesium carbonate to the above reaction system, and react at 100°C for 12h;
[0103] 0.0592g of terephthalaldehyde was added to the suspension prepared in step (2), and reacted at 100°C for 12h;
[0104] Then, 0.2072 g of amidine and 0.580 g of cesium carbonate were added to the above reaction system and reacted at 100° C. for 12 hours.
[0105] (3) Post-processing
[0106] First wash with deionized water twice, each wash for 4-5 hours, and then suction filtration;...
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