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A kind of covalent triazine framework polymer, its preparation method and application

A covalent triazine and polymer technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, chemical/physical processes, etc., can solve the problem of narrow selection range, triazine framework polymer hydrogen production In order to avoid problems such as poor performance, the method is simple, the triazine framework polymer is regular, and the effect of improving hydrogen production performance is achieved.

Active Publication Date: 2020-10-02
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In view of the above defects or improvement needs of the prior art, the present invention provides a covalent triazine framework polymer, its preparation method and application, which uses a monomer containing α-C and a functional group as the first monomer , and the second monomer polyamidine compound, under the action of a strong base catalyst, a condensation reaction occurs, and a hydrophilic triazine framework polymer with mesoporous and macroporous structures is prepared, which is used for photolysis of water to produce hydrogen. The hydrogen production performance is significantly improved, thereby solving the technical problems of the existing technology to prepare triazine framework polymer monomers with narrow selection range and the obtained triazine framework polymer with poor hydrogen production performance

Method used

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  • A kind of covalent triazine framework polymer, its preparation method and application
  • A kind of covalent triazine framework polymer, its preparation method and application
  • A kind of covalent triazine framework polymer, its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0091] A method for preparing a methyl-based covalent triazine framework material, comprising the steps of:

[0092] (1) Add a certain mass (1.0g) of p-xylene and dimethylamidine monomer with a group ratio of 2:1 in a round bottom flask of a certain volume (250.0mL);

[0093] (2) Based on step (1), potassium tert-butoxide with a ratio of 1:1 to the terephthalamidine group was added to the system, and 50 mL of DMSO was added as a solvent and stirred evenly;

[0094] (3) Based on step (2), then add 200 μL of distilled water to the flask;

[0095] (4) Start stirring based on step (3), heat, and use two gradient heating methods for heating, first heating and reacting at 100°C for 48 hours, and then heating and reacting at 160°C for 48 hours;

[0096] (5) Under the reaction conditions based on step (4), the reaction time is 96 hours. Then stop heating and stirring, and then add 50mL of ethanol to the system after the device is completely cooled. Then vacuum filter using Buchner ...

Embodiment 2

[0105] A method for preparing a covalent triazine framework material based on acetate, comprising the steps of:

[0106] (1) In a round bottom flask of a certain volume (250.0mL), add a certain mass (1.0g) of diacetic acid and a dimethylamidine monomer with a group ratio of 2:1;

[0107] (2) Based on step (1), then add a strong base such as potassium tert-butoxide in an amount of 1:1 to the terephthalamidine group into the system, add 50 mL of DMSO as a solvent and stir Uniform;

[0108] (3) Based on step (2), then add 200 μL of distilled water into the flask.

[0109] (4) Start stirring based on step (3), heat, and use two gradient heating methods for heating, the first heating reaction at 150°C for 48 hours, and then heating reaction at 160°C for 48 hours.

[0110] (5) Under the reaction conditions based on step (4), the waiting time for reaction is 96 hours. Then stop heating and stirring, and then add 50mL of ethanol to the system after the device is completely cooled. ...

Embodiment 3

[0119] A preparation method of a benzylamine-based covalent triazine framework material, comprising the steps of:

[0120] (1) Add a certain mass (1.0 g) of dibenzylamine and dimethylamidine monomer with a group ratio of 2:1 into a round bottom flask with a certain volume (250.0 mL).

[0121] (2) Based on step (1), then add a strong base such as potassium tert-butoxide in an amount of 1:1 to the terephthalamidine group into the system, add 50 mL of DMSO as a solvent and stir uniform.

[0122] (3) Based on step (2), then add 200 μL of distilled water into the flask.

[0123] (4) Start stirring based on step (3), heat, and use two gradient heating methods for heating, the first heating reaction at 100-150°C for 48 hours, and then heating reaction at 160°C for 48 hours.

[0124] (5) Under the reaction conditions based on step (4), the waiting time for reaction is 96 hours. Then stop heating and stirring, and then add 50mL of ethanol to the system after the device is completely...

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Abstract

The present invention belongs to the technical field of new materials, and more specifically, relates to a covalent triazine framework polymer, its preparation method and application. Mix the first monomer, the second monomer, the solvent and the catalyst evenly, react, and obtain a covalent triazine framework polymer after separation and purification; the catalyst is a strong base with a base pKa greater than 14; the first monomer is a polymer containing α -C and functional group monomer; the first monomer contains at least two of the functional groups; the functional group is an aldehyde group or a functional group that can be converted into an aldehyde group through oxidation or reduction; the second monomer It is a polyvalent amidine compound; this method can not only greatly expand the monomer range of the currently reported covalent triazine framework for the synthesis of covalent triazine frameworks, but also help to reduce the cost and restrictions of synthesis and apply it to photocatalytic water splitting for hydrogen production. The hierarchical porous structure of the material is conducive to the generation and separation of photogenerated carriers and reduces the recombination of photogenerated carriers, thereby improving the photoelectric performance and catalytic efficiency of the semiconductor.

Description

technical field [0001] The invention belongs to the technical field of new materials, and more specifically relates to a covalent triazine framework polymer, its preparation method and application. Background technique [0002] Covalent organic triazine frameworks, as one of the classifications of porous organic materials, have been widely studied and applied in various fields. [0003] In 2008, Thomas et al. used ion thermal method in ZnCl 2 CTF-1 is obtained at medium and high temperature (>400°C), with high specific surface area and microporous structure, but this method leads to partial carbonization of the polymer, no energy band structure, and poor photocatalytic performance. [0004] In 2012, Cooper et al. synthesized CTF-1 with energy band structure by using trifluoromethanesulfonic acid under strong acid conditions to synthesize CTF-1 with energy band structure, but the specific surface area of ​​CTF-1 synthesized under this strong acid environment Low, the hyd...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/06B01J31/06B01J35/00B01J35/10C01B3/04
CPCC08G73/0644C08G73/065B01J31/063C01B3/042C01B2203/0277B01J35/39B01J35/60Y02E60/36
Inventor 金尚彬张思泉谭必恩程光
Owner HUAZHONG UNIV OF SCI & TECH
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