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High-density graphene/silver composite and preparation method thereof

A composite material, graphene technology, applied in graphene, metal material coating process, nanotechnology for materials and surface science, etc., can solve the problem of low mass percentage of silver or nano silver, low density, particle size problems such as low diameter, to avoid agglomeration and damage, simple preparation process, and prevent agglomeration

Inactive Publication Date: 2018-03-06
郴州博太超细石墨股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a high Preparation method of dense graphene / silver composite material

Method used

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  • High-density graphene/silver composite and preparation method thereof
  • High-density graphene/silver composite and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] The present embodiment provides a kind of high density graphene / silver composite material preparation method, comprises the following steps:

[0037] S1. Preparation of graphene oxide substrate: graphene oxide was prepared by the improved Hummers method, and then dissolved in water for secondary ultrasonic dispersion to obtain a monolayer graphene oxide aqueous solution with a concentration of 0.02g / L;

[0038] After cleaning and drying the silicon carbide or silicon oxide substrate, immerse it in APTS ethanol solution to complete the surface treatment, and then immerse it in the graphene oxide aqueous solution to obtain the graphene oxide substrate;

[0039] S2. Configure silver nitrate reducing solution: mix 0.1mol / L silver nitrate, 0.05mol / L sodium citrate and 0.1mol / L glucose to obtain silver nitrate reducing solution;

[0040] S3. Immerse the graphene oxide substrate prepared in step S1 in the silver nitrate reducing solution in step S2, the reaction temperature is...

Embodiment 2

[0050] The present embodiment provides a kind of high density graphene / silver composite material preparation method, comprises the following steps:

[0051] S1. Preparation of graphene oxide substrate: graphene oxide was prepared by the improved Hummers method, and then dissolved in water for secondary ultrasonic dispersion to obtain a monolayer graphene oxide aqueous solution with a concentration of 0.04g / L;

[0052] After cleaning and drying the silicon carbide or silicon oxide substrate, immerse it in APTS ethanol solution to complete the surface treatment, and then immerse it in the graphene oxide aqueous solution to obtain the graphene oxide substrate;

[0053] S2. Configure silver nitrate reducing solution: mix 0.3mol / L silver nitrate, 0.1mol / L sodium citrate and 0.3mol / L glucose to obtain silver nitrate reducing solution;

[0054] S3. Immerse the graphene oxide substrate prepared in step S1 in the silver nitrate reducing solution in step S2. The reaction temperature is ...

Embodiment 3

[0060] This embodiment is basically the same as Embodiment 1, except that in step S4, steps S2 to S4 are repeated three times.

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Abstract

The invention relates to the field of graphene composite materials, and discloses a high-density graphene / silver composite material and a preparation method thereof. The high-density graphene / silver composite material and its preparation method obtain a single-layer graphene oxide solution through a secondary ultrasonic dispersion process, which prevents discontinuity of the lamellae, and is a "carbon" composed of multi-layer graphene oxide sheets mixed with each other. and using the substrate as the graphene oxide solution substrate, by growing silver or nano-silver on the surface of the graphene oxide substrate; at the same time, in order to obtain silver or nano-silver with higher density and lower particle size, the present invention impregnates the substrate. Multiple reactions are carried out, and finally a highly dense graphene / composite is obtained.

Description

technical field [0001] The invention relates to the field of graphene composite materials, more specifically, to a high-density graphene / silver composite material and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional planar single-layer structure of carbon formed by sp2 hybridized carbon atoms bonded in the form of a hexagonal lattice, which is an allotrope of carbon. Graphene is the basic unit for constructing other dimensional carbon materials. When it changes in the way of wrapping, winding and stacking, it can form zero-dimensional fullerene, one-dimensional carbon nanotube and three-dimensional graphite respectively. Graphene has good electrical and optical properties, mechanical properties, thermal conductivity and extremely high charge carrier mobility, as well as excellent mechanical strength and flexibility. These properties of graphene make it attract a lot of attention and quickly become a research hotspot. Graphene and it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/44B22F9/24C01B32/184B82Y40/00B82Y30/00
Inventor 林荣铨
Owner 郴州博太超细石墨股份有限公司
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