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A silver-based composite material of nitrogen-doped graphene and preparation method thereof

A technology of nitrogen-doped graphene and composite materials, applied in the field of silver-based composite materials, can solve problems such as poor electrical conductivity, and achieve the effects of improving electrical conductivity, improving wettability, and excellent comprehensive performance

Active Publication Date: 2020-11-17
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a silver-based composite material of nitrogen-doped graphene, which solves the problem of poor electrical conductivity of the existing graphene silver-based composite material

Method used

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  • A silver-based composite material of nitrogen-doped graphene and preparation method thereof
  • A silver-based composite material of nitrogen-doped graphene and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0024] A kind of preparation method specific process of the silver-based composite material of nitrogen-doped graphene is as follows figure 1 As shown, the specific operation steps are as follows:

[0025] Step 1, graphene oxide is added to deionized water, the mass ratio of graphene oxide to deionized water is 1:0.5-1, ultrasonic dispersion is 1-1.5h, and graphene oxide dispersion is obtained;

[0026] Step 2, adding urea to the graphene oxide dispersion to obtain a mixed solution A, then ultrasonically dispersing the mixed solution A, performing magnetic stirring while ultrasonically dispersing, the mass ratio of the graphene oxide dispersion to urea is 1 :30-40, obtain mixed dispersion liquid;

[0027] Step 3: Keep the mixed dispersion liquid in a hydrothermal reaction kettle at 160°C for 4-7 hours, take it out, then cool it down to room temperature naturally, then wash it with absolute ethanol, and then perform centrifugation treatment, and the precipitate obtained after ...

Embodiment 1

[0033] Step 1, graphene oxide is added to deionized water, the mass ratio of graphene oxide and deionized water is 1:0.5, and ultrasonically dispersed for 1h to obtain a graphene oxide dispersion;

[0034] Step 2, adding urea to the graphene oxide dispersion to obtain a mixed solution A, then ultrasonically dispersing the mixed solution A, performing magnetic stirring while ultrasonically dispersing, the mass ratio of the graphene oxide dispersion to urea is 1 : 30, obtain mixed dispersion liquid;

[0035] Step 3, the mixed dispersion liquid is kept in a hydrothermal reaction kettle at 160°C for 4 hours, then taken out, then naturally cooled to room temperature, then washed with absolute ethanol, and centrifuged, and the precipitate obtained after centrifuged is dried, The drying environment is vacuum, the vacuum degree is 1×10 -2 Pa, the drying temperature is 60°C, and the drying time is 20 hours to obtain nitrogen-doped graphene powder;

[0036] Step 4, take nitrogen-doped...

Embodiment 2

[0040] Step 1, graphene oxide is added to deionized water, the mass ratio of graphene oxide and deionized water is 1:1, ultrasonic dispersion is 1.5h, and graphene oxide dispersion is obtained;

[0041]Step 2, adding urea to the graphene oxide dispersion to obtain a mixed solution A, then ultrasonically dispersing the mixed solution A, performing magnetic stirring while ultrasonically dispersing, the mass ratio of the graphene oxide dispersion to urea is 1 :40, obtain mixed dispersion liquid;

[0042] Step 3, the mixed dispersion liquid is kept in a hydrothermal reaction kettle at 160°C for 7 hours, then taken out, then naturally cooled to room temperature, then washed with absolute ethanol, and centrifuged, and the precipitate obtained after centrifuged is dried, The drying environment is vacuum, the vacuum degree is 0.5×10 -2 Pa, the drying temperature is 60°C, and the drying time is 30h to obtain nitrogen-doped graphene powder;

[0043] Step 4, take nitrogen-doped graphen...

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Abstract

The invention discloses a silver-based composite material of nitrogen-doped graphene, and a preparation method thereof. The preparation method comprises the following steps: preparing a graphene oxidedispersion, dissolving urea in the graphene oxide dispersion, carrying out heat insulation on the obtained solution in a hydrothermal reactor for several hours, taking out the obtained reaction product, naturally cooling the product to room temperature, and washing, centrifuging and drying the product to obtain nitrogen-doped graphene powder; mixing the nitrogen-doped graphene with an anhydrous ethanol solution of silver powder, and stirring and drying the obtained mixture at 60-80 DEG C to obtain nitrogen-doped graphene and silver powder composite powder; and carrying out ball milling, three-dimensional powder mixing, compacting and hot pressing sintering on the composite powder to finally obtain the silver-based composite material of nitrogen-doped graphene. Graphene is doped with a nitrogen atom through the method to improve the electric conductivity of reduced graphene oxide, improve the distribution of graphene in a matrix and the interface bonding between the graphene and the metal matrix and obtain the silver-based bulk composite material of nitrogen-doped graphene.

Description

technical field [0001] The invention belongs to the technical field of silver-based composite materials, and in particular relates to a silver-based composite material of nitrogen-doped graphene, and also relates to a preparation method of the silver-based composite material. Background technique [0002] The material prepared by metallic silver has low room temperature resistivity, good ductility, low resistance and excellent oxidation resistance. It is widely used in low-voltage electrical appliances, communication electronic instruments, household appliances, aerospace devices and other fields. The widest and most economical precious metal materials. Although it has many excellent properties, it has some shortcomings such as low strength. [0003] Graphene is a new type of two-dimensional honeycomb nanomaterial closely arranged by a single layer of carbon atoms. It has excellent electrical and thermal conductivity, high Young's modulus and hardness, and is the material w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C5/06C01B32/184
CPCC01B32/184C22C1/05C22C5/06
Inventor 王献辉杨洁张会周思敏
Owner XIAN UNIV OF TECH