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Preparation method of gold-reduced graphene oxide-foamed nickel composite

A composite material, graphene technology, applied in graphene, metal processing equipment, nanotechnology and other directions, can solve the problems of large consumption of graphene oxide, reduced practical value, easy to be damaged, etc., to save consumption, stabilize mass production, Simple to use effects

Active Publication Date: 2017-11-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This composite, on the one hand, needs to consume a large amount of graphene oxide, on the other hand, its strength is low, and it is prone to damage during application, which greatly reduces its practical value.

Method used

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  • Preparation method of gold-reduced graphene oxide-foamed nickel composite
  • Preparation method of gold-reduced graphene oxide-foamed nickel composite
  • Preparation method of gold-reduced graphene oxide-foamed nickel composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Preparation of graphene oxide: take 20ml of concentrated sulfuric acid, stir for 5min under an ice-water bath, then add 1g of graphite powder and stir for 15min; after complete mixing, take 0.5g of sodium nitrate and slowly add it to the above solution to react for 10min; Weigh 1g of potassium permanganate and add it to the above solution and continue to stir for 1h; heat the aqueous solution to 35°C and continue the reaction for 40min; continue to raise the temperature to 80°C, add 40ml of deionized water, and stir for 40min; after the high temperature reaction is over , get 15ml of hydrogen peroxide and add; after cooling, centrifugal washing is repeated 4 times and dispersed in deionized water, configured into a graphene oxide aqueous solution with a concentration of 0.5mg / mL;

[0027] 2) Preparation of graphene oxide-nickel foam: using nickel foam as the skeleton, the nickel foam was ultrasonically cleaned with acetone, ethanol and deionized water for 10 min succe...

Embodiment 2

[0031] 1) Preparation of graphene oxide: take 30ml of concentrated sulfuric acid, stir for 6min in an ice-water bath, then add 1.5g of graphite powder and stir for 16min; after complete mixing, take 0.6g of sodium nitrate and slowly add it to the above solution to react for 12min ; Weigh 1.5g of potassium permanganate into the above solution and continue to stir for 1.2h; heat the aqueous solution to 37°C and continue the reaction for 45min; continue to raise the temperature to 85°C, add 45ml of deionized water, stir for 45min; high temperature After the reaction, 16ml of hydrogen peroxide was added; after cooling, it was repeatedly centrifuged and washed 5 times and dispersed in deionized water, and configured into a graphene oxide aqueous solution with a concentration of 0.8mg / mL;

[0032] 2) Preparation of graphene oxide-nickel foam: using nickel foam as the skeleton, the nickel foam was ultrasonically cleaned with acetone, ethanol and deionized water for 11 min successively...

Embodiment 3

[0036]1) Preparation of graphene oxide: take 40ml of concentrated sulfuric acid, stir for 8min under an ice-water bath, then add 2g of graphite powder and stir for 18min; after complete mixing, take 0.8g of sodium nitrate and slowly add it to the above solution to react for 17min; Weigh 2g of potassium permanganate and add it to the above solution and continue to stir for 1.5h; heat the aqueous solution to 38°C and continue the reaction for 50min; continue to raise the temperature to 85°C, add 50ml of deionized water, and stir for 50min; the high temperature reaction ends After cooling, 17ml of hydrogen peroxide was added; after cooling, it was centrifuged and washed 5 times and dispersed in deionized water to form a graphene oxide aqueous solution with a concentration of 1.5mg / mL;

[0037] 2) Preparation of graphene oxide-nickel foam: using nickel foam as the skeleton, the nickel foam was ultrasonically cleaned with acetone, ethanol and deionized water for 12 min successively,...

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Abstract

The invention provides a preparation method of a gold-reduced graphene oxide-foamed nickel composite. The preparation method of the gold-reduced graphene oxide-foamed nickel composite mainly comprises the following technological steps that firstly, graphene oxide is prepared, and a graphene oxide aqueous solution of a certain concentration is prepared; secondly, the foamed nickel is dipped in the prepared graphene oxide aqueous solution, after dipping is full, the foamed nickel is taken out and dried, and graphene oxide-foamed nickel is obtained after repetition conducted for many times; thirdly, the graphene oxide-foamed nickel is dipped in a newly-prepared ascorbic acid aqueous solution, the ascorbic acid aqueous solution is placed in a water bath kettle at the temperature of 60-90 DEG C, the temperature is kept for 20-40 min, the graphene oxide-foamed nickel is taken out, rinsed and dried, and then reduced graphene oxide-foamed nickel is obtained; and fourthly, the reduced graphene oxide-foamed nickel is placed in a chloroauric acid solution, under the ultrasonic condition, an reaction is performed for 1-5 min, and after drying, the gold-reduced graphene oxide-foamed nickel material uniform in gold nanometer particle distribution can be obtained.

Description

technical field [0001] The invention relates to a preparation method of a gold-reduced graphene oxide-foamed nickel composite material, and belongs to the technical field of material chemical preparation. Background technique [0002] Gold nanoparticles are widely used in catalysis, sensing and other fields due to their small particle size, high specific surface area, and many active sites. In order to prevent the agglomeration of gold nanoparticles prepared by liquid phase method, a large amount of surfactant is often added. The presence of surfactant greatly reduces the active sites of gold nanoparticles, which seriously affects its performance. At the same time, the gold sol has the characteristics of large loss and difficult recovery during the application process, which not only causes a lot of waste, but also increases the cost. Therefore, in order to uniformly and stably disperse gold nanoparticles, reduce their loss, and make them easy to recycle after application, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08B22F9/24C01B32/184B82Y40/00
CPCC22C1/08B82Y40/00B22F9/24B22F1/054
Inventor 郭新立刘园园刘闯祝龙王小娟赵丽葛创张伟杰
Owner SOUTHEAST UNIV
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