Method for preparing graphene on surface of copper powder

A technology of graphene and copper powder, which is applied in the direction of graphene, chemical instruments and methods, nano-carbon, etc., can solve the problem that graphene is easy to agglomerate, and achieve the effect of low price, safe and controllable repeatability, and simple and mature process

Pending Publication Date: 2022-06-03
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in the field of copper-based composite materials, copper-based composite materials with graphene as the reinforcing phase are a research hotspot. People expect to use the excellent properties of graphene to improve the comprehensive performance of copper-based composite materials. The easy-to-reunite problem is hard to solve

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  • Method for preparing graphene on surface of copper powder
  • Method for preparing graphene on surface of copper powder
  • Method for preparing graphene on surface of copper powder

Examples

Experimental program
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Effect test

Embodiment 1

A method for preparing graphene on the surface of copper powder, specifically comprising the following steps:

(1) Weigh 50 g of pure copper powder as a catalytic substrate, and reduce it at 500 °C for 60 min under a mixed atmosphere of 20 sccm hydrogen and 200 sccm argon to remove oxides and pollutants on the surface of copper powder.

[0023] (2) Weigh 5 g of anhydrous copper acetate powder, mix the copper powder and the anhydrous copper acetate powder into an agate mortar and grind for 60 min to make it evenly mixed.

[0024] (3) Pour the mixed powder of copper powder and anhydrous copper acetate into the corundum crucible, and put it into the heating zone of the tube furnace. The furnace temperature was raised to 500 °C within 40 min, and the holding time was 30 min; after the heat preservation was completed, the furnace temperature was raised to 1020 °C within 35 min. Adjust the argon flow rate to 500sccm, keep the hydrogen flow rate unchanged, and then keep the holding t...

Embodiment 2

A method for preparing graphene on the surface of copper powder, specifically comprising the following steps:

(1) Weigh 20 g of pure copper powder as a catalytic substrate, and reduce it at 550 °C for 60 min under a mixed atmosphere of 20 sccm hydrogen and 200 sccm argon to remove oxides and pollutants on the surface of copper powder;

(2) Weigh 2 g of anhydrous copper acetate powder, mix the copper powder and anhydrous copper acetate powder into an agate mortar, grind for 60 minutes, and mix them evenly.

[0027] (3) Pour the mixed powder of copper powder and anhydrous copper acetate into the corundum crucible, and put it into the heating zone of the tube furnace. The furnace temperature was raised to 600 °C within 40 min, and the holding time was 50 min; after the heat preservation, the furnace temperature was raised to 1050 °C within 35 min. When the temperature reached 1050 °C, a 1sccm methane carbon source was immediately introduced, and Adjust the argon flow to 500sccm,...

Embodiment 3

A method for preparing graphene on the surface of copper powder, specifically comprising the following steps:

(1) Weigh 30g of pure copper powder as a catalytic substrate, and reduce it at 600℃ for 60min under a mixed atmosphere of 20sccm hydrogen and 200sccm argon to remove oxides and pollutants on the surface of copper powder;

(2) Weigh 4 g of anhydrous copper acetate powder, mix the copper powder and anhydrous copper acetate powder into an agate mortar and grind for 40 minutes to make the mixture uniform.

[0030] (3) Pour the mixed powder of copper powder and anhydrous copper acetate into the corundum crucible, and put it into the heating zone of the tube furnace. Under atmospheric pressure, pass a mixed gas of 80sccm high-purity hydrogen and 500sccm high-purity argon, The furnace temperature was raised to 550 °C within 40 min, and the holding time was 40 min; after the heat preservation, the furnace temperature was raised to 1030 °C within 35 min. Adjust the argon flow ...

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Abstract

The invention discloses a method for preparing graphene on the surface of copper powder, and belongs to the field of new material preparation. The method comprises the following steps: by taking copper powder as a catalytic substrate and methane as a carbon source, grinding and uniformly mixing the copper powder and anhydrous copper acetate powder or copper acetylacetonate powder according to a certain proportion, and placing the mixed powder in a heating area of a tubular furnace; under the mixed atmosphere of hydrogen and argon, the mixed powder is heated to 500-600 DEG C, heat preservation is conducted for a certain time, the anhydrous cupric acetate or copper acetylacetonate is converted into nano-copper particles with the surfaces coated with carbon films, and high-temperature bonding of the copper powder is hindered. And then the temperature continues to rise to 1000 DEG C or above, methane is introduced, and high-quality multi-layer graphene is prepared on the copper powder. The method is simple and easy to implement, can prepare the multilayer graphene on the copper powder, is suitable for large-scale industrial production, and has wide potential application in the fields of powder metallurgy, composite materials, electronic power and the like.

Description

technical field [0001] The invention relates to a method for preparing graphene on the surface of copper powder, and belongs to the field of new material preparation. Background technique [0002] In modern industry, copper powder has a wide range of important applications in many fields, such as catalytic materials, conductive pastes, lubricant additives, and raw materials for powder metallurgy and 3D printing. However, due to the large surface area of ​​copper powder, it is easy to oxidize in the air and reduce its own performance. Therefore, the oxidation of copper powder is the main factor limiting its application. At present, studies have shown that coating multilayer graphene films on copper substrates by chemical vapor deposition can achieve an anti-oxidation effect of up to 6 years. Due to the good metal properties of graphene, it will not affect the thermal conductivity and electrical conductivity of copper powder. Therefore, the preparation of multilayer graphen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/186
CPCC01B32/186C01B2204/04
Inventor 陶静梅李国庆易健宏刘意春鲍瑞李凤仙方东李才巨游昕谈松林
Owner KUNMING UNIV OF SCI & TECH
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