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Method for preparing graphene load nano silver-nickel alloy composite powder materials

A technology of composite powder and nano-silver, applied in graphene, nano-carbon, nano-technology, etc., can solve problems such as uneven dispersion and poor chemical stability, and achieve good dispersion, simple method, and stable chemical properties

Inactive Publication Date: 2013-12-25
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention solves the problems of uneven dispersion and poor chemical stability of the graphene-loaded nano-silver-nickel alloy composite material prepared in the prior art, and provides a preparation method for the graphene-loaded nano-silver-nickel alloy composite powder material

Method used

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  • Method for preparing graphene load nano silver-nickel alloy composite powder materials
  • Method for preparing graphene load nano silver-nickel alloy composite powder materials

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specific Embodiment approach 1

[0021] Specific embodiment one: the preparation method of graphene-loaded nano-silver-nickel alloy composite powder material in this embodiment is specifically carried out according to the following steps:

[0022] 1. Mix graphite powder and concentrated sulfuric acid evenly, then put it into an ice-water bath at a temperature of 0°C to 4°C and stir for 30 minutes to obtain a mixed solution, wherein the mass of graphite powder is 1g to 1.5g, and the volume of concentrated sulfuric acid is 50mL ;

[0023] 2. Add sodium nitrate and potassium permanganate successively to the mixed solution obtained in step 1 in an ice-water bath with a temperature of 0°C to 4°C, stir for 2 hours, then stir for 1 hour at room temperature, and then React in a water bath at 35°C for 10 hours, then add distilled water, then add hydrogen peroxide until the mixed solution is golden yellow, then add dilute sulfuric acid, centrifuge after cooling, then put it into a semi-permeable membrane for dialysis t...

specific Embodiment approach 2

[0025] Embodiment 2: This embodiment is different from Embodiment 1 in that: the quality of the graphite powder in step 1 is 1.2 g. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0026] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the mass concentration of dilute sulfuric acid in step 2 is 30%. Others are the same as in the first embodiment.

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Abstract

The invention relates to a method for preparing graphene load nano silver-nickel alloy composite powder materials. The method aims to solve the problems that graphene load nano silver-nickel alloy composite materials prepared in the prior art are nonuniform in scattering and poor in chemical stability. The method comprises the first step of intercalation and expansion, the second step of stripping and the third step of the preparation of the graphene load nano silver-nickel alloy composite powder materials. Oxidized graphene is prepared through an oxidation-reduction method, then the oxidized graphene, silver ions and nickel ions are mixed and restored through reducing agents to obtain the graphene nano silver-nickel alloy composite materials, the method is simple and fast, any surface dressing agent does not need to be added, and alloy particles on the surface of the graphene are uniform in distribution and stable in chemical performance. The method is used for preparing the graphene load nano silver-nickel alloy composite powder materials.

Description

technical field [0001] The invention relates to a preparation method of a graphene-supported nano silver-nickel alloy composite material. Background technique [0002] Graphene is a new carbon material in which carbon atoms are tightly packed into a single-layer two-dimensional honeycomb lattice structure. The thickness of this graphite crystal film is only 0.335nm, which is regarded as "the thinnest material in the universe" and has a huge application potential. As a nanofiller, graphene may be superior to other traditional nanofillers due to its extremely high specific surface area, thermal and electrical conductivity, electromagnetic shielding ability, flexibility, transparency, and low thermal expansion coefficient. At the same time, nano-alloy materials are also being studied because of their special functions and excellent properties in electricity, catalysis, and corrosion resistance. Nanocomposite materials can not only have the various specificities of nanomateria...

Claims

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Application Information

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IPC IPC(8): C01B31/04B22F9/24B82Y30/00C01B32/182
Inventor 赵东宇崔文婧王琳付敬雯
Owner HEILONGJIANG UNIV
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