Preparation method of copper/graphene core-shell structure

A core-shell structure, graphene technology, applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of uneven compounding and weak connection between graphene and copper particles, and achieve increased elasticity and toughness. simple effect

Active Publication Date: 2019-01-01

YANCHENG TEACHERS UNIV

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AI-Extracted Technical Summary

Problems solved by technology

The present invention directly grows single-layer/multilayer graphene on the surface of copper nanoparticles/copper nanospheres, or wraps incomplete and discontinuous graphene small sheets/quantum dots, single-layer graphene/multilayer graphene/discontinuous The combination of graphene small flakes/graphene quantum dots and copper nanoparticles/copper nanospheres is very strong, which overcomes the shortc...

Abstract

The invention provides a preparation method of a copper/graphene core-shell structure. The preparation method comprises the following steps: putting copper nanoparticles/copper nanospheres into a CVD(Chemical Vapor Deposition) tubular furnace; introducing a carbon source under a mixed atmosphere of hydrogen gas and argon gas; enabling graphene to grow on the surfaces of the copper nanoparticles/copper nanospheres to form an initial core-shell structure; putting the initial core-shell structure into a graphene dispersion solution with an equivalent size and stirring to obtain the copper/graphene core-shell structure. The copper/graphene core-shell structure prepared by the method provided by the invention can be used for effectively protecting nano-copper and increasing the elasticity andtoughness of a composite material; the graphene and copper are firmly combined; the preparation method has the advantages of simple steps and less pollution and is suitable for industrial or laboratory operation.

Application Domain

Microballoon preparationMicrocapsule preparation

Technology Topic

Cvd grapheneNanometre +9

Image

Examples

Experimental program(4)

Example Embodiment

[0023] Example 1

[0024] (1) Put 0.1g of copper nanospheres with a size of 100-200nm into a CVD tube furnace. The flow rate of hydrogen and argon is 100sccm, the flow rate of acetylene is 5sccm, the temperature is 1000℃, and the time is 45min to form an initial core-shell structure. .

[0025] (2) Disperse 10 mg of graphene powder with a size of 100-1000 nm in 20 mL of N-methylpyrrolidone ultrasonically for 1 hour.

[0026] (3) After finishing the ultrasound, quickly add the initial core-shell structure to the solution and stir for 1 hour to obtain the copper/graphene core-shell structure.

[0027] figure 1 In this embodiment, a transmission electron microscope image of graphene is used.

[0028] figure 2 In this embodiment, the Raman graph of graphene is used.

[0029] image 3 In this example, a TEM image of the copper/graphene core-shell structure was prepared.

[0030] Figure 4 In this example, the X-ray diffraction pattern of the copper/graphene core-shell structure was prepared. The copper peak position is obvious, and there is no graphite peak near 26°, which proves that graphene is not agglomerated to form layers and layers due to the separation effect of nano-copper. Regularly arranged graphite.

Example Embodiment

[0031] Example 2

[0032] (1) Put 0.1g of copper nanospheres with a size of 200-400nm into a CVD tube furnace. The flow rate of hydrogen and argon is 100sccm, the flow rate of acetylene is 5sccm, the temperature is 1000℃, and the time is 45min to form an initial core-shell structure. .

[0033] (2) Disperse 10 mg of graphene powder with a size of 200-2000 nm in 20 mL of N-methylpyrrolidone ultrasonically for 1 hour.

[0034] (3) After finishing the ultrasound, quickly add the initial core-shell structure to the solution and stir for 1 hour to obtain the copper/graphene core-shell structure.

Example Embodiment

[0035] Example 3

[0036] (1) Put 0.1g of copper nanospheres with a size of 100-200nm into a CVD tube furnace. The flow rate of hydrogen and argon is 100sccm, the flow rate of ethylene is 5sccm, the temperature is 1000℃, and the time is 45min to form an initial core-shell structure. .

[0037] (2) Disperse 10 mg of graphene powder with a size of 100-1000 nm in 20 mL of N-methylpyrrolidone ultrasonically for 1 hour.

[0038] (3) After finishing the ultrasound, quickly add the initial core-shell structure to the solution and stir for 1 hour to obtain the copper/graphene core-shell structure.

PUM

Property	Measurement	Unit
Size	10.0 ~ 1000.0	nm
Concentration	0.01 ~ 5.0	mg/ml

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Strong combination
Improve elasticity and toughness

Preparation method of copper/graphene core-shell structure

A core-shell structure, graphene technology, applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of uneven compounding and weak connection between graphene and copper particles, and achieve increased elasticity and toughness. simple effect

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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