Method for preparing grapheme-Ag nano-particle composite material

A nanoparticle and composite material technology, applied in the field of nanomaterial manufacturing, can solve problems such as complex preparation methods, increased product costs, and complex preparation processes, and achieve the effects of simple methods, reduced environmental hazards, and reduced use

Inactive Publication Date: 2013-07-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the preparation method of graphene-Ag nanoparticle composite materials is relatively complicated, and it is usually necessary to add certain reducing agents, such as polyols, sodium borohydride,

Method used

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  • Method for preparing grapheme-Ag nano-particle composite material
  • Method for preparing grapheme-Ag nano-particle composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take 0.1 g graphene oxide and 1 g AgNO 3 Dissolve in 50ml of water, then sonicate for 30 minutes to mix well;

[0024] Graphene oxide is separated by centrifugation and washed with deionized water several times;

[0025] The graphene oxide obtained in the previous step is heated to 200 degrees Celsius for 10 minutes under vacuum to obtain the graphene-Ag nanoparticle composite material. The morphology of the obtained composite material is as follows figure 1 and figure 2 As shown, the Ag nanoparticles are less than 10 nm in diameter.

Embodiment 2

[0027] Get 0.1 gram of graphene oxide and 0.5 gram of silver perchlorate and dissolve in 100ml of ethanol, then stir for 60 minutes until uniformly mixed;

[0028] Graphene oxide is separated by filtration and washed with ethanol several times;

[0029] The graphene oxide obtained in the previous step was heated to 100 degrees Celsius for 5 hours under nitrogen to obtain the graphene-Ag nanoparticle composite material.

Embodiment 3

[0031] Dissolve 0.5 gram of graphene oxide and 0.1 gram of silver fluoride in 200ml of N-methylpyrrolidone, then stir for 30 minutes until uniformly mixed;

[0032] Graphene oxide is separated by centrifugation and washed with N-methylpyrrolidone several times;

[0033] The graphene oxide obtained in the previous step is heated to 800 degrees Celsius for 5 seconds under a hydrogen atmosphere to obtain a graphene-Ag nanoparticle composite material.

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Abstract

The invention discloses a method for preparing a grapheme-Ag nano-particle composite material. The method includes the steps: firstly, dissolving raw oxidized grapheme and Ag salt into solvents according to mass ratio and uniformly mixing the solvents; secondly, separating out the oxidized grapheme, and cleaning and drying the oxidized grapheme by the solvents in the first step; and thirdly, performing heat treatment for the oxidized grapheme obtained in the second step in vacuum or specific atmosphere at the temperature of 30-800 degrees Celsius for 5 seconds to 5 hours to obtain the grapheme-Ag nano-particle composite material, wherein the specific atmosphere includes one of nitrogen, argon or hydrogen. The grapheme-Ag nano-particle composite material can be obtained by heat treatment without adding reducing agents. The method is simple, usage of chemical reagents is effectively decreased, cost is reduced, environmental damage is decreased, and the method is green and environment-friendly.

Description

technical field [0001] The invention relates to the field of nanomaterial manufacturing, in particular to a method for preparing a graphene-Ag nanoparticle composite material. Background technique [0002] Graphene is a carbon material with a two-dimensional honeycomb structure formed by a single layer of carbon atoms, and has excellent mechanical and electrical properties. At the same time, graphene has a high specific surface area and can be used as a carrier material for nanocatalysts, so it has broad application prospects. Ag nanoparticles have excellent optical properties and have important applications in photocatalysis, surface-enhanced Raman spectroscopy, etc. Combining Ag nanoparticles with graphene can inhibit the aggregation of Ag nanoparticles and improve the optical activity of Ag nanoparticles. [0003] At present, the preparation methods of graphene-Ag nanoparticle composites are relatively complicated, and usually need to add certain reducing agents, such a...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
Inventor 尹奎波叶子超房颢吴蕾陈方韬季静孙立涛
Owner SOUTHEAST UNIV
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