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Graphene composite catalyst with good catalytic performance and preparation method thereof

A graphene composite and catalytic performance technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of precious metal particle loss, insufficient surface area, waste of active ingredients, etc., and achieve photocatalysis Effects of improved performance, increased contact area, and improved adsorption performance

Inactive Publication Date: 2019-05-21
周玉芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the insufficient surface area of ​​the existing supported noble metal catalysts, many catalytically active particles entering the interior of the carrier cannot contact the substrate and are difficult to function, resulting in a waste of active ingredients
In addition, the separation of supported noble metal catalysts usually adopts strong mechanical methods such as filtration and centrifugation, which will inevitably lead to the loss of noble metal particles, which is also one of the reasons for catalyst deactivation after recovery.

Method used

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  • Graphene composite catalyst with good catalytic performance and preparation method thereof
  • Graphene composite catalyst with good catalytic performance and preparation method thereof

Examples

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Effect test

example 1

[0031] Put graphene oxide and deionized water in a three-necked flask at a mass ratio of 1:20, then place the three-necked flask in an ultrasonic disperser, and then add dropwise to the three-necked flask with a mass fraction of 30 % ammonia water to adjust the pH to 7.8, then put the three-necked flask in the digital speed measuring constant temperature magnetic stirrer, then add sodium azide 0.3 times the mass of graphene oxide, heat and stir the reaction, then add tetrahydrochloride 0.03 times the mass of graphene oxide Lithium aluminum hydride was heated and stirred for 2 hours at a temperature of 160°C and a rotation speed of 500r / min, and then filtered to obtain a filter residue. Then, the filter residue was placed in an oven, and dried to a constant weight at a temperature of 110°C to obtain a pre- Processing graphene oxide; by weight, 30 parts of alcohol, 30 parts of acid, 20 parts of petroleum ether, 3 parts of animal oil, 20 parts of tetrabutyl titanate, and 20 parts ...

example 2

[0033] In parts by weight, 30 parts of alcohol, 30 parts of acid, 20 parts of petroleum ether, 3 parts of animal oil, 20 parts of tetrabutyl titanate, and 20 parts of graphene oxide were placed in a four-necked flask at a temperature of 140 ° C. Under the condition of rotating speed of 800r / min, after stirring and reacting at high temperature for 3 hours, a mixed solution was obtained; then, a sodium hydroxide solution with a mass fraction of 30% was added to the four-necked flask to adjust the pH to 8.3, and then titanic acid was added to the four-necked flask An emulsifier with 0.2 times the mass of tetrabutyl titanate and an isocyanate with 0.05 times the mass of tetrabutyl titanate were stirred and mixed for 60 minutes at a rotation speed of ~600r / min to obtain a mixed homogenate; then the mixed homogenate was placed in an autoclave , pressurize to 1.5MPa, under the condition of pressure of 1.5MPa, after keeping the pressure for 50s, release the pressure instantly to obtain...

example 3

[0035] Graphene oxide and deionized water were placed in a three-necked flask at a mass ratio of 1:20, and then the three-necked flask was placed in an ultrasonic disperser. Under the condition of an ultrasonic frequency of 130kHz, a mass fraction of 30% was added dropwise to the three-necked flask. ammonia water to adjust the pH to 7.8, then place the three-necked flask in a digital display speed measuring constant temperature magnetic stirrer, then add sodium azide 0.3 times the mass of graphene oxide, heat and stir the reaction, and then add tetrahydrogenate 0.03 times the mass of graphene oxide Aluminum lithium, heated and stirred for 2 hours at a temperature of 160°C and a speed of 500r / min, filtered to obtain a filter residue, then put the filter residue in an oven, and dried to a constant weight at a temperature of 110°C to obtain a pretreatment Graphene oxide; In parts by weight, 30 parts of water, 30 parts of acid, 20 parts of sherwood oil, 3 parts of animal oil, 20 pa...

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Abstract

The invention discloses a graphene composite catalyst with good catalytic performance and a preparation method thereof, and belongs to the technical field of catalyst preparation. The method includesthe steps that graphene oxide and deionized water are mixed and subjected to ultrasonic treatment, ammonia water is dropwise added to regulate the pH, sodium azide is added, a heating and stirring reaction is carried out, lithium aluminum tetrahydride is added, a heating and stirring reaction is carried out, and filtering and drying are carried out to obtain pretreated graphene oxide; alcohol, acid, petroleum ether, animal oil, tetrabutyl titanate and the pretreated graphene oxide are subjected to a high-temperature stirring reaction to obtain mixed liquor; a sodium hydroxide solution is addedinto the mixed liquor to regulate the pH, an emulgator and isocyanate are added, and stirring and mixing are carried out to obtain mixed homogenate; the mixed homogenate is put into an autoclave, pressurization, pressure maintaining and instantaneous depressurization are carried out, filtering and drying are carried out, and the graphene composite catalyst is obtained. The graphene composite catalyst has an excellent photocatalytic effect and a long service life, and can be widely applied to the field of catalysts.

Description

technical field [0001] The invention discloses a graphene composite catalyst with good catalytic performance and a preparation method thereof, belonging to the technical field of catalyst preparation. Background technique [0002] In chemical processes, catalysts can reduce the activation energy and speed up the reaction chemistry, so we often use catalysts to increase the rate of chemical reactions. At present, supported noble metals are mainly obtained by supporting noble metal salts on activated carbon and then reducing them, such as platinum carbon and palladium carbon, which are widely used in pharmaceuticals and fine organic synthesis. Because the surface area of ​​the existing supported noble metal catalysts is not large enough, many catalytically active particles entering the interior of the carrier cannot contact the substrate and are difficult to function, resulting in a waste of active ingredients. In addition, the separation of supported noble metal catalysts us...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J21/18B01J37/16
Inventor 周玉芳
Owner 周玉芳
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