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Method for preparing hydrogen peroxide by using covalent organic framework catalyst to catalyze oxygen reduction

A covalent organic framework and catalyst technology, applied in the field of electrocatalysis, can solve problems such as precise regulation of catalytic sites, achieve diverse designability, enrich heteroatom catalytic active sites, and improve catalytic performance and stability.

Active Publication Date: 2022-03-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these materials all face the problem of precise regulation of catalytic sites, and it is difficult to accurately adjust the active center and content to further improve catalytic performance.

Method used

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  • Method for preparing hydrogen peroxide by using covalent organic framework catalyst to catalyze oxygen reduction
  • Method for preparing hydrogen peroxide by using covalent organic framework catalyst to catalyze oxygen reduction
  • Method for preparing hydrogen peroxide by using covalent organic framework catalyst to catalyze oxygen reduction

Examples

Experimental program
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Effect test

Embodiment 1

[0053] A method for preparing a COFs material with tris(4-aminophenyl)amine (TAPA) as the central building block, the specific steps are as follows:

[0054] (1) Weigh 7.30mg (0.04mmol) of DTDA and 8.80mg (0.03mmol) of TAPA into a 5mL glass tube, then add 500μL of n-butanol and 500μL of 1,2-dichlorobenzene into the above glass bottle, and ultrasonically After 30 minutes to obtain a uniform mixed solution, take 100 μL of 6 mol / L acetic acid solution and add it to the mixed solution and sonicate for 10 minutes to obtain the final solution.

[0055] (2) Transfer the uniformly mixed solution in the glass bottle to the Parker tube, freeze it quickly with liquid nitrogen, evacuate the internal pressure to a vacuum, and then seal it. After returning to room temperature and thawing, vacuumize repeatedly three times. Put the vacuumized solution in an oven at 120°C for three days of reaction, and cool to room temperature after the reaction. The product obtained by the reaction was was...

Embodiment 2

[0057] A method for preparing a COFs material with three (4-aminophenyl) benzene (TAPB) as a central building unit, the specific steps are as follows:

[0058] (1) Weigh 7.30mg (0.04mmol) of DTDA and 10.50mg (0.03mmol) of TAPA into a 5mL glass tube, then add 500μL of n-butanol and 500μL of 1,2-dichlorobenzene into the above glass bottle, and ultrasonically After 30 minutes to obtain a uniform mixed solution, take 100 μL of 6 mol / L acetic acid solution and add it to the mixed solution and sonicate for 10 minutes to obtain the final solution.

[0059] (2) Transfer the uniformly mixed solution in the glass bottle to the Parker tube, freeze it quickly with liquid nitrogen, evacuate the internal pressure to a vacuum, and then seal it. After returning to room temperature and thawing, vacuumize repeatedly three times. Put the vacuumized solution in an oven at 120°C for three days of reaction, and cool to room temperature after the reaction. The product obtained by the reaction was ...

Embodiment 3

[0061] A method for preparing a COFs material with 4,4',4"-(1,3,5-triazine-2,4,6-triyl)triphenylamine (TTT) as a central building unit, the specific steps are as follows:

[0062] (1) Weigh 7.30mg (0.04mmol) of DTDA and 10.50mg (0.03mmol) of TTT into a 5mL glass tube, then add 500μL of n-butanol and 500μL of 1,2-dichlorobenzene into the above glass bottle, and ultrasonically After 30 minutes to obtain a uniform mixed solution, take 100 μL of 6 mol / L acetic acid solution and add it to the mixed solution and sonicate for 10 minutes to obtain the final solution.

[0063] (2) Transfer the uniformly mixed solution in the glass bottle to the Parker tube, freeze it quickly with liquid nitrogen, evacuate the internal pressure to a vacuum, and then seal it. After returning to room temperature and thawing, vacuumize repeatedly three times. Put the vacuumized solution in an oven at 120°C for three days of reaction, and cool to room temperature after the reaction. The product obtained b...

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Abstract

The invention discloses a method for preparing hydrogen peroxide by using a covalent organic framework catalyst to catalyze oxygen reduction, and belongs to the field of electrocatalysis. According to the invention, thieno [3, 2-b] thiophene-2, 5-dicarboxaldehyde (DTDA) is used as a linear construction unit, and 4, 4 ', 4'-tetramethyl-4, 4 ', 4'-tetramethyl-4, according to the preparation method, the COFs material constructed by taking 3, 4 ', 4'-(1, 3, 5-triazine-2, 4, 6-triyl) triphenylamine (TTT), tris (4-aminophenyl) amine (TAPA) and tris (4-aminophenyl) benzene (TAPB) as central constructs respectively is used as a catalyst, oxygen reduction preparation of hydrogen peroxide with high oxygen reduction activity, stability and hydrogen peroxide selectivity is realized, the operation is simple, the controllability is strong, and certain universality is realized.

Description

technical field [0001] The invention specifically relates to a method for preparing hydrogen peroxide by using a covalent organic framework catalyst to catalyze oxygen reduction, and belongs to the technical field of electrocatalysis. Background technique [0002] h 2 o 2 It is a multifunctional and environmentally friendly oxidizing agent. It is widely used in disinfection, pulp, textile bleaching, wastewater treatment, chemical synthesis, semiconductor cleaning, detergent and exhaust gas treatment. Due to its wide application, the global H 2 o 2 demand continues to rise. According to incomplete statistics, in 2015 the global H 2 o 2 The annual output reaches 5.5 million tons. At present, the industry mainly adopts electrolysis method and anthraquinone method. The electrolysis method has high current efficiency, short process flow and high product quality, but due to high power consumption and high production cost, it is not suitable for large-scale industrial produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/085C25B1/30C25B1/50
CPCC25B11/085C25B1/30C25B1/50Y02E60/50
Inventor 陆双龙邱思杭黄绍达杜明亮朱罕段芳
Owner JIANGNAN UNIV
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