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Method for preparing grapheme/silver nanoparticles composite material by using liquid phase method

A technology of silver nanoparticles and composite materials, which is applied in the field of preparation of graphene-silver nanoparticle composite materials, can solve the problems affecting the performance of composite materials, functional groups cannot be eliminated, etc., and achieve the advantages of preventing agglomeration, uniform distribution and high bonding strength Effect

Active Publication Date: 2012-08-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although there have been some reports on the preparation methods of graphene / silver nanoparticle composites, most of the preparation methods of graphene / silver nanoparticle composites in the above reports use graphene oxide, and graphene oxide is compared with graphene. The surface of graphene oxide contains many oxygen-containing functional groups. These oxygen-containing functional groups and carbon atoms are combined in the form of covalent bonds. After further reduction, some functional groups still cannot be eliminated, which seriously affects the performance of the composite material.

Method used

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  • Method for preparing grapheme/silver nanoparticles composite material by using liquid phase method
  • Method for preparing grapheme/silver nanoparticles composite material by using liquid phase method
  • Method for preparing grapheme/silver nanoparticles composite material by using liquid phase method

Examples

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Embodiment 1

[0029] Take 10mg of graphene and disperse it in 30mL of DMF, then add 3mg of sodium lauryl sulfate, and ultrasonically treat it at 40KHz, 100W power for 100min, so as to break the agglomeration of graphene, so that the graphene sheets are evenly dispersed in the DMF solution , making the N of graphene thus, N-dimethylformamide (DMF) solution; The silver nitrate that takes 40mg is dissolved in the deionized water of 15mL, magnetic force stirs 5 minutes, makes it fully dissolve and obtains silver nitrate aqueous solution; Mix the above graphene N,N-dimethylformamide (DMF) solution and silver nitrate aqueous solution, ultrasonically vibrate for 30 minutes, then transfer to a three-necked beaker, adjust the pH value to 7, and place in a water bath at 60°C Vigorously stir the reaction for 30 minutes, after the completion of the reaction, static precipitation for 24 hours, filter the precipitated product and wash it with ethanol, acetone, and deionized water in turn, and dry it at ro...

Embodiment 2

[0031] Take 10mg of graphene and disperse it in 30mL of DMF, then add 3mg of sodium lauryl sulfate, and ultrasonically treat it at 40KHz, 100W power for 60min, so as to break the agglomeration of graphene, so that the graphene sheets are evenly dispersed in the DMF solution ; Weigh 80 mg of silver nitrate and dissolve it in 15 mL of deionized water, stir it magnetically for 7 minutes to make it fully dissolved; mix the above two solutions, ultrasonically vibrate for 60 min, then transfer to a three-necked beaker, and use a mass fraction of 5% Adjust the pH value to 8 with ammonia water, stir vigorously in a water bath at 65°C for 60 minutes, and settle for 20 hours after the reaction is completed. Filter the precipitated product and wash it with ethanol, acetone, and deionized water in sequence, and dry it in a blast drying oven at room temperature. The graphene / silver powder obtained in 24 hours is the product of the present invention: graphene-silver nanoparticle composite ma...

Embodiment 3

[0034] Take 10mg of graphene and disperse it in 30mL of DMF, then add 3mg of sodium lauryl sulfate, and ultrasonically treat it at 40KHz, 100W power for 120min, so as to break the agglomeration of graphene, so that the graphene sheets are evenly dispersed in the DMF solution , Weigh 120 mg of silver nitrate and dissolve it in 15 mL of deionized water, stir it magnetically for 10 min to make it fully dissolved, mix the above two solutions, oscillate ultrasonically for 50 min, then transfer to a three-necked beaker with a mass fraction of 5% Adjust the pH value to 8 with enammonia water, and stir vigorously in a water bath at 65°C for 80 minutes. After the reaction is completed, the precipitation is static for 18 hours. The precipitated product is filtered and washed with ethanol, acetone, and deionized water in sequence, and placed in a blast drying oven at room temperature After drying for 24 hours, the obtained graphene / silver powder is the product of the present invention: gr...

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Abstract

The invention discloses a method for preparing a grapheme / silver nanoparticles composite material by using a liquid phase method. N and N-dimethyl formamide (DMF) serve as a reducing agent, grapheme powder with purity as high as 99% serves as a carrier, and silver forms a core and grows on a grapheme layer under a soft reaction condition to obtain the grapheme / silver nanoparticles composite material. The preparation method has the advantages of being simple, convenient, rapid and high-efficient in process, the grapheme / silver nanoparticles composite material prepared by using the method is high in purity and less in impurity content, and silver nanoparticles generated on the surface layer of the grapheme are small in particle size, uniform in distribution and high in bond strength with the grapheme. The silver nanoparticles are closely absorbed on the grapheme layer, aggregation of the grapheme is effectively avoided, and application of the grapheme / silver nanoparticles composite material in the fields of electron, catalysis, antibiosis and the like can be enlarged.

Description

technical field [0001] The invention relates to a method for preparing a nanocomposite material, in particular to a method for preparing a graphene-silver nanoparticle composite material. Background technique [0002] Graphene is a single atomic layer crystal in which carbon atoms are distributed on a two-dimensional honeycomb crystal lattice. Since graphene was discovered, due to its excellent physical and chemical properties and broad application prospects, research related to graphene Work has become a current research hotspot in related disciplines. [0003] Graphene has a unique two-dimensional nanostructure, making graphene an ideal nanoparticle carrier to prepare graphene-based composite materials. The inherent excellent properties of graphene also make graphene-based composite materials present many excellent properties and have received great attention. For example, adding graphene to SnAgCu solder can significantly increase the strength of the solder; using graph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50B01J21/18B82Y30/00B82Y40/00
Inventor 徐连勇杨高阳韩永典荆洪阳
Owner TIANJIN UNIV
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