Carbon aerogel catalyst synthesized based on microwave action as well as synthesis method and application of carbon aerogel catalyst

A carbon aerogel and catalyst technology, applied in the field of carbon aerogel catalyst and its synthesis, can solve the problems of environmental pollution, difficult recovery, toxicity and the like, and achieve the effects of simple operation, short time consumption and good selectivity

Pending Publication Date: 2021-08-24
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, the normal pressure drying method, which has been studied more hotly, is to repeatedly soak the wet gel in a solvent with a low surface tension coefficient, and replace the water in the wet gel with a low surface tension solvent. This process is not only t...

Method used

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  • Carbon aerogel catalyst synthesized based on microwave action as well as synthesis method and application of carbon aerogel catalyst
  • Carbon aerogel catalyst synthesized based on microwave action as well as synthesis method and application of carbon aerogel catalyst
  • Carbon aerogel catalyst synthesized based on microwave action as well as synthesis method and application of carbon aerogel catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Prepare 10-CXGs-600 by microwave synthesis for 10 minutes, including the following steps:

[0045]Weigh 2.20g of resorcinol and place it in a 50mL beaker, add 10.8mL of water and stir at room temperature for 10min at a stirring speed of 700rpm, take 4mL of formaldehyde solution (mass concentration 37%) with a pipette and add to the above solution , stirring for 10 minutes, rotating speed 700rpm, adding 1 mol / L sodium hydroxide solution dropwise to adjust the pH value to about 6. Then the obtained reaction liquid system is transferred to the reaction tube, and then the reaction tube is placed in the microwave synthesizer, and the microwave synthesizer is turned on to carry out microwave radiation heating (the operating power of the microwave synthesizer is controlled at 200W, the microwave power of the following examples and implementation The same as in Example 1), the temperature of the reaction liquid system was raised to 85° C., and the microwave irradiation time was...

Embodiment 2

[0047] Prepare 15-CXGs-600 by microwave synthesis for 15 minutes, including the following steps;

[0048] Weigh 2.20g of resorcinol and place it in a 50mL beaker, add 10.8mL of water and stir at room temperature for 10min at a stirring speed of 700rpm, take 4mL of formaldehyde solution (mass concentration 37%) with a pipette and add to the above solution , stirring for 2 minutes, rotating speed 700rpm, adding dropwise 1mol / L sodium hydroxide solution to adjust the pH value to about 6. Then the obtained reaction liquid system was transferred to a reaction tube, and then the reaction tube was placed in a microwave synthesizer, and the microwave synthesizer was turned on for microwave radiation heating, so that the temperature of the reaction liquid system was raised to 85° C., and the microwave radiation time was 15 min. Then the synthesized wet gel was transferred from the reaction tube to a petri dish, and dried in an oven at 60 °C for 12 h. Then transferred to a porcelain bo...

Embodiment 3

[0050] 20-CXGs-600 was prepared by microwave synthesis for 20 minutes, including the following steps:

[0051] Weigh 2.20g of resorcinol and place it in a 50mL beaker, add 10.8mL of water and stir at room temperature for 10min at a stirring speed of 700rpm, take 4mL of formaldehyde solution (mass concentration 37%) with a pipette and add to the above solution , stirring for 10 minutes, rotating speed 700rpm, adding 1 mol / L sodium hydroxide solution dropwise to adjust the pH value to about 6. Then the obtained reaction liquid system was transferred to a reaction tube, and then the reaction tube was placed in a microwave synthesizer, and the microwave synthesizer was turned on for microwave radiation heating, so that the temperature of the reaction liquid system was raised to 85° C., and the microwave radiation time was 20 min. Then the synthesized wet gel was transferred from the reaction tube to a petri dish, and dried in an oven at 60 °C for 12 h. Then transferred to a porce...

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Abstract

The invention discloses a carbon aerogel catalyst synthesized based on microwave action as well as a synthesis method and application thereof, wherein the preparation method of the catalyst comprises the steps: taking resorcinol and formaldehyde as reaction raw materials, taking water as a solvent, adding the reaction raw materials into water, adjusting the pH value to 5-7, placing the reaction liquid system in a microwave radiation environment, and reacting; and after the reaction is finished, drying, transferring the obtained solid into a tubular furnace, and roasting in a nitrogen atmosphere to obtain the carbon aerogel catalyst product. A microwave synthesis method is used for replacing a normal-temperature stirring method to prepare the carbon aerogel catalyst, the method has the advantages that operation is easy, synthesis is rapid, and the influence of selectivity of hydrogen peroxide preparation through electrocatalytic oxygen reduction of the carbon aerogel catalyst is explored by controlling the time for synthesizing the carbon aerogel catalyst through microwaves; and the catalyst provided by the invention has good hydrophobic and electro-catalytic effects, and has a good application prospect in a reaction for catalytically preparing hydrogen peroxide.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a carbon airgel catalyst synthesized under the action of microwaves, a synthesis method and application thereof. Background technique [0002] Hydrogen peroxide (hydrogen peroxide) is an important chemical substance, which is widely used in fields such as industry, medicine, environmental protection, military industry, food and environment. It is both oxidizing and reducing and has no secondary pollution after use, which is defined as a green chemical product. At present, the most mature method for industrial large-scale production of hydrogen peroxide is the anthraquinone method, but the anthraquinone method is not only cumbersome, but also uses some organic solvents, causing secondary pollution to the environment. Therefore, we are looking for a green and efficient method to produce hydrogen peroxide. imminent. [0003] In the electrochemical oxygen r...

Claims

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Application Information

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IPC IPC(8): C01B32/05C25B1/30C25B11/075
CPCC01B32/05C25B1/30
Inventor 王建国彭小革张世杰包志康季文凯丁磊王国梁
Owner ZHEJIANG UNIV OF TECH
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