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Preparation and characterization method for graphene/gold nanoparticle composite material

A gold nanoparticle and composite material technology, which is applied in the preparation and characterization of graphene/gold nanoparticle composite materials, can solve the problems of long reduction period, poor controllability, single material structure, etc., and achieve the effect of simple method

Inactive Publication Date: 2016-11-23
TIANJIN BAOXINGWEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the electrochemical method is introduced into the preparation of graphene, toxic and harmful reducing agents are no longer used. The electrochemical reduction method prevents the pollution of the material and realizes environmental friendliness, but there are still problems such as long reduction period, poor controllability, and material monolithic problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation and characterization method of a graphene / gold nanoparticle composite material, the specific steps are:

[0027] (1) Preparation of graphene oxide:

[0028] Low-temperature reaction: under stirring conditions, slowly add 1kg of graphite powder in batches to 36kg of concentrated sulfuric acid cooled in an ice-water bath, and then slowly add 2.5kg of KMnO in batches after the reactants are completely mixed. 4 , the time of controlling feeding is 50min, and the speed of feeding is that no purple gas emerges;

[0029] Medium-temperature reaction: After the addition is complete, remove the ice-water bath, and stir the reaction at room temperature to obtain a tan batter-like product;

[0030] High-temperature reaction: add the tan batter-like product in batches to deionized water continuously stirred in a constant temperature water bath at 100°C to obtain a tan product;

[0031] Post-processing: Add hydrogen peroxide dropwise to the tan product until no bubble...

Embodiment 2

[0045] A preparation and characterization method of a graphene / gold nanoparticle composite material, the specific steps are:

[0046] (1) Preparation of graphene oxide:

[0047] Low-temperature reaction: under stirring conditions, slowly add 1 kg of graphite powder in batches to 40 kg of concentrated sulfuric acid cooled in an ice-water bath, and after the reactants are completely mixed, slowly add 4 kg of KMnO in batches 4 , the time of controlling feeding is 90min, and the speed of feeding is that no purple gas emerges;

[0048] Medium-temperature reaction: After the addition is complete, remove the ice-water bath, and stir the reaction at room temperature to obtain a tan batter-like product;

[0049] High-temperature reaction: Add the tan batter-like product in batches to deionized water continuously stirred in a constant temperature water bath at 100°C to obtain a tan product;

[0050] Post-treatment: Add hydrogen peroxide dropwise to the tan product until no bubbles com...

Embodiment 3

[0064] A preparation and characterization method of a graphene / gold nanoparticle composite material, the specific steps are:

[0065] (1) Preparation of graphene oxide:

[0066] Low-temperature reaction: under stirring conditions, slowly add 1 kg of graphite powder in batches to 38 kg of concentrated sulfuric acid cooled in an ice-water bath, and after the reactants are completely mixed, slowly add 3.5 kg of KMnO in batches 4 , the time of controlling feeding is 70min, and the speed of feeding is that no purple gas emerges;

[0067] Medium-temperature reaction: After the addition is complete, remove the ice-water bath, and stir the reaction at room temperature to obtain a tan batter-like product;

[0068] High-temperature reaction: Add the tan batter-like product in batches to deionized water continuously stirred in a constant temperature water bath at 100°C to obtain a tan product;

[0069] Post-processing: Add hydrogen peroxide dropwise to the tan product until no bubbles ...

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Abstract

The present invention is a preparation and characterization method of a graphene / gold nanoparticle composite material. The specific steps are: (1) preparation of graphene oxide: including multiple steps of low-temperature reaction, medium-temperature reaction, high-temperature reaction and post-treatment; (2) ) preparation of graphene oxide dispersion system; (3) preparation of graphene / gold nanoparticle composite electrodeposition precursor; (4) preparation of graphene / gold nanoparticle composite material: including electrode pretreatment and electrodeposition preparation; ( 5) Characterization of graphene / gold nanoparticle composites: including scanning electron microscopy and transmission electron microscopy. The method for preparing the graphene / gold nanoparticle composite material in the invention is simple and green, and by adjusting the form and concentration of the metal precursor, the morphology control of the graphene-based composite film can be realized. The controllability of the structure of this method provides a new idea for material design and controlled synthesis for the application of graphene-based materials, especially in electrochemistry.

Description

technical field [0001] The invention relates to the field of production of graphene-metal composite materials, in particular to a preparation and characterization method of a graphene / gold nanoparticle composite material. Background technique [0002] In recent years, a large number of preparation methods of graphene and its composite materials have emerged, among which the graphene oxide reduction method has been deeply studied due to its advantages of simple operation, low cost, and large-scale production, and has become the mainstream method for preparing graphene composite materials. When the electrochemical method is introduced into the preparation of graphene, toxic and harmful reducing agents are no longer used. The electrochemical reduction method prevents the pollution of the material and realizes environmental friendliness, but there are still problems such as long reduction period, poor controllability, and material A problem with a single structure. Contents of...

Claims

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Application Information

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IPC IPC(8): C25D9/08C25C5/02C25D3/48B82Y40/00
CPCC25D9/08B82Y40/00C25C5/02C25D3/48
Inventor 潘中海司荣美刘彩风
Owner TIANJIN BAOXINGWEI TECH
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