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A kind of graphene/silver nanocomposite material and its preparation method and application

A composite material and graphene technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the complex preparation method of graphene/silver nanocomposite materials, discontinuous graphene sheets, Uncontrollable density and other problems, to achieve excellent electrical performance, promising application prospects, and improved structure

Active Publication Date: 2019-08-02
郴州博太超细石墨股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a kind of graphene / silver nanocomposite material in the prior art with complex preparation methods, discontinuous graphene sheets, and uncontrollable size and density of silver nanoparticles grown on the surface of graphene. Preparation method of graphene / silver nanocomposite material with continuous layer, silver nanoparticle size and density controllable

Method used

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  • A kind of graphene/silver nanocomposite material and its preparation method and application
  • A kind of graphene/silver nanocomposite material and its preparation method and application
  • A kind of graphene/silver nanocomposite material and its preparation method and application

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Embodiment 1

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

[0037] S1. Preparation of graphene oxide: graphene oxide was prepared by improving the Hummers method;

[0038] S2. Secondary ultrasonic dispersion: dissolving the graphene oxide prepared in step S1 in water, performing secondary ultrasonic dispersion, and then obtaining a graphene oxide solution with a concentration of 0.02-0.04 g / L;

[0039] S3. Preparation of graphene oxide substrate: after the silicon oxide or silicon carbide substrate is cleaned and dried, the surface is treated with a silane coupling agent, and then immersed in the graphene oxide solution prepared in step S2 to obtain the graphene oxide substrate;

[0040] S4. Graphene / silver nanocomposite material: immerse the graphene oxide substrate in silver nitrate solution, then add 0.01-0.03wt% sodium citrate, and then place it in an inert gas atmosphere. The reaction tem...

Embodiment 2

[0048] This embodiment is basically the same as Embodiment 1, except that the reaction time of the graphene substrate in the silver nitrate solution in step S4 is 20 minutes.

Embodiment 3

[0050] This embodiment is basically the same as Embodiment 1, except that the reaction time of the graphene substrate in the silver nitrate solution in step S4 is 30 minutes.

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Abstract

The invention relates to the field of graphene composite materials and discloses a graphene / silver nano composite material and preparing method and application of the graphene / silver nano composite material. The preparing method of the graphene / silver nano composite material includes the steps that S1, oxidized graphene is prepared; S2, secondary ultrasonic dispersion is conducted; S3, an oxidizedgrapheme substrate is prepared; and S4, the graphene / silver nano composite material is prepared. Secondary ultrasonic dispersion is conducted so that a single-layer oxidized graphene solution can beobtained, the single-layer oxidized graphene solution is put on the substrate to be reacted with silver nitrite, and silver nano particles can grow on the surface of the oxidized graphene. The preparing technology is simple, according to the core, the size and density of the silver nano particles growing on the surface of the graphene can be controlled by controlling the reaction time of the single-layer oxidized graphene solution and the silver nitrite. The electrical performance of the prepared graphene / silver nano composite material is excellent, the electric conductivity ranges from 12 S / cm to 34 S / cm, and the particle size of the silver nano particles is stabilized to range from 2.5 nm to 5.5 nm. The composite material can be provided as the raw material for preparing high-performancedevices such as transistors and sensors, and the application prospect of the composite material is considerable.

Description

technical field [0001] The invention relates to the field of graphene composite materials, more specifically, to a graphene / silver nanocomposite material and its preparation method and application. 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 i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/26B82Y40/00B82Y30/00
CPCB22F9/26B82Y30/00B82Y40/00
Inventor 林荣铨
Owner 郴州博太超细石墨股份有限公司