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Application of heteroatom-containing triazine covalent organic framework material in photocatalysis

A covalent organic framework and heteroatom technology, applied in organic compound/hydride/coordination complex catalysts, inorganic chemistry, physical/chemical process catalysts, etc., can solve the problem of low photocatalytic efficiency and achieve high catalytic efficiency , mild application, rich composition effect

Active Publication Date: 2018-11-27
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a heteroatom-containing triazine covalent organic framework material as a photocatalyst, the purpose of which is to use the polycondensation reaction of aldehyde groups and amidines to The aldehyde group of the ring is used as a monomer to introduce heteroatoms, so that the structural position of the heteroatoms in the prepared triazine-based covalent organic framework material is clear and the content is controllable. The heteroatom-containing triazine-based covalent organic framework material prepared by this method is The valent organic framework material is applied in the field of photocatalysis, thereby solving the technical problem of low photocatalytic efficiency of the heteroatom-containing triazine-based covalent organic framework material in the prior art

Method used

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  • Application of heteroatom-containing triazine covalent organic framework material in photocatalysis
  • Application of heteroatom-containing triazine covalent organic framework material in photocatalysis
  • Application of heteroatom-containing triazine covalent organic framework material in photocatalysis

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Add 0.06g of 3,6-dialdehyde ethylcarbazole, 0.12g of terephthalmidine, and 0.3g of cesium carbonate into 10mL of DMSO, and react at 120°C for 120h. After the reaction is completed, filter with suction, then wash with 150mL dilute hydrochloric acid, repeat three times, then wash with 150mL acetone, repeat three times, and finally wash with 150mL N,N dimethylformamide, and repeat washing three times, washing to remove residual Oligomers and catalysts. The obtained solid was subjected to Soxhlet extraction with tetrahydrofuran for 24 h, and vacuum-dried to obtain the product with a yield of 70%.

[0037] Get 4 mg of the product of Example 1, 80 mL of an aqueous solution of Rhodamine B at 20 ppm, first dark-treat for 1 h, and then test at a wavelength of visible light (λ≥420 nm). figure 1 It is the change of the ultraviolet response of methyl orange with the photodegradation time when the triazine ring covalent organic framework material obtained in Example 1 is used as a ...

Embodiment 2

[0040] Add 0.08g of 4,8-diformyl-benzothiadiazole, 0.12g of phthalimidine, and 0.3g of cesium carbonate into 10mL of DMF, and react at 100°C for 120h. After the reaction is completed, filter with suction, then wash with 150mL dilute hydrochloric acid, repeat three times, then wash with 150mL acetone, repeat three times, and finally wash with 150mL N,N dimethylformamide, and repeat washing three times, washing to remove residual Oligomers and catalysts. The obtained solid was subjected to Soxhlet extraction with tetrahydrofuran for 24 h, and vacuum-dried to obtain the product with a yield of 85%.

[0041] Take 4 mg of the product of Example 2, 80 mL of an aqueous solution of 20 ppm methyl orange, first dark-treat for 1 h, and then test under ultraviolet and visible light irradiation (λ≥350 nm). image 3 It is the change of the ultraviolet response of methyl orange with the photodegradation time when the triazine ring covalent organic framework material obtained in Example 2 is...

Embodiment 3

[0044] Add 0.08g of 2,6-diformylpyridine, 0.12g of phthalimidine, and 0.3g of cesium carbonate into 10mL of DMSO, and react at 150°C for 120h. After the reaction is completed, filter with suction, then wash with 150mL dilute hydrochloric acid, repeat three times, then wash with 150mL acetone, repeat three times, and finally wash with 150mL N,N dimethylformamide, and repeat washing three times, washing to remove residual Oligomers and catalysts. The obtained solid was subjected to Soxhlet extraction with tetrahydrofuran for 24 h, and vacuum-dried to obtain the product with a yield of 64%.

[0045] Take 4 mg of the product of Example 3, 80 mL of an aqueous solution of 20 ppm methylene blue, first dark-treat for 1 h, and then test at a visible light wavelength (λ≥420 nm). Figure 5 It is the change of the ultraviolet response of methyl orange with the photodegradation time when the triazine ring covalent organic framework material obtained in Example 3 is used as a photocatalyst...

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Abstract

The invention belongs to the field of photocatalyst application of organic semiconductors and in particular relates to application of a heteroatom-containing triazine covalent organic framework material in photocatalysis. The heteroatom-containing triazine covalent organic framework material serves as a photocatalyst. The preparation method comprises the following steps: introducing heteroatoms through heterocyclic aldehyde group monomers, carrying out a condensation polymerization reaction with binary or poly-element amidino compounds in the presence of a basic catalyst, thereby obtaining theproduct. The material serves as the photocatalyst, and is capable of degrading organic pollutants in water and producing hydrogen under light conditions by virtue of water splitting. According to themethods, the heteroatom-containing triazine covalent organic framework material is introduced to serve as the photocatalyst, and is high in catalytic efficiency, high in applicability and suitable for large-scale application.

Description

technical field [0001] The invention belongs to the application field of organic semiconductor photocatalysis in the field of photocatalysis, and more specifically relates to the application of a heteroatom-containing triazine covalent organic framework material in photocatalysis. Background technique [0002] Compared with inorganic semiconductors, organic semiconductors have attracted the attention of researchers because of their low cost, adjustable structure and performance. However, the electron transport ability of organic semiconductors is poor, and the photocatalytic efficiency needs to be improved. [0003] Element doping is a strategy to improve photocatalytic efficiency. The introduction of heteroatoms can directly affect the charge distribution and polarity of organic materials, which in turn can improve the electron transport efficiency of semiconductor materials. The commonly used method of introducing light elements, such as N, S, O is prepared by heat treatm...

Claims

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Application Information

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IPC IPC(8): B01J31/06C01B3/04C02F1/30C02F101/30C02F101/34
CPCC01B3/042C02F1/30B01J31/06C02F2305/10C02F2101/308C02F2101/345B01J35/39Y02E60/36
Inventor 金尚彬郭莉萍谭必恩黄琦许海涛
Owner HUAZHONG UNIV OF SCI & TECH
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