Preparation method of graphene-silver nano particle composite material

A technology of silver nanoparticles and composite materials, applied in the field of preparation of graphene-silver nanoparticle composite materials, can solve problems such as toxic strong reducing agents hydrazine and sodium borohydride, and achieve the effect of narrow distribution range and uniform particle size

Inactive Publication Date: 2011-08-24
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although the reports on graphene-silver nanoparticle composites have a certain basis, some of the above-mentioned preparation methods of graphene-silver nanoparticle composites use toxic and strong reducing agents such as hydrazine and sodium borohydride, and some are under strong corrosion. performed under sexual conditions

Method used

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  • Preparation method of graphene-silver nano particle composite material
  • Preparation method of graphene-silver nano particle composite material
  • Preparation method of graphene-silver nano particle composite material

Examples

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Embodiment 1

[0022] Disperse 50mg of graphite oxide in 100mL of deionized water, and ultrasonicate at 50KHz, 500W power for 10min. Dissolve 40 mg of silver nitrate in 5 mL of deionized water, and add dilute ammonia water with a mass fraction of 2% into the silver nitrate solution dropwise until the formed precipitate just disappears completely. Add the configured silver ammonia solution to the graphene oxide solution that has been sonicated, and stir and preheat in a water bath at 40°C for 10 minutes. 50 mL of aqueous solution dissolved with 85 mg of glucose was added to the preheated mixture of graphene oxide and silver ammonia solution, and the reaction was stirred at 85° C. for 1 h. After the reaction was complete, the product was filtered and washed with deionized water and ethanol several times.

Embodiment 2

[0024] 100 mg of graphite oxide was dispersed in 100 mL of deionized water, and ultrasonically treated at 50 KHz, 500 W power for 30 min. Dissolve 120 mg of silver nitrate in 5 mL of deionized water, and add 3% dilute ammonia water dropwise into the silver nitrate solution until the formed precipitate just disappears completely. Add the configured silver ammonia solution to the graphene oxide solution that has been sonicated, and stir and preheat in a water bath at 50°C for 20 minutes. 50 mL of aqueous solution dissolved with 500 mg of glucose was added to the preheated mixture of graphene oxide and silver ammonia solution, and the reaction was stirred at 95° C. for 4 h. After the reaction was complete, the product was filtered and washed with deionized water and ethanol several times.

Embodiment 3

[0026]100mg of graphite oxide was dispersed in 100mL of deionized water, and ultrasonically treated at 50KHz, 500W power for 40min. Dissolve 157 mg of silver nitrate in 10 mL of deionized water, and add 3% dilute ammonia water dropwise into the silver nitrate solution until the formed precipitate just disappears completely. Add the configured silver ammonia solution to the graphene oxide solution that has been sonicated, and stir and preheat in a water bath at 60°C for 30 minutes. 100 mL of aqueous solution dissolved with 1330 mg of glucose was added to the preheated mixture of graphene oxide and silver ammonia solution, and the reaction was stirred at 95° C. for 8 h. After the reaction was complete, the product was filtered and washed with deionized water and ethanol several times.

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Abstract

The invention provides a preparation method of a graphene-silver nano particle composite material. A specific preparation process comprises the following steps of: preparing solution of silver ammonia at certain concentration from the solution of silver nitrate and aqueous solution of dilute ammonia, adding the prepared solution of silver-ammonia into the solution of graphene oxide which is subjected to ultrasonic processing, preheating the solution at a certain temperature for a certain time; adding an appropriate amount of glucose into the mixed solution of graphene oxide and silver ammonia, and reacting the mixed solution at the set temperature for a certain time with stirring; performing suction-filtration on a reaction product by using deionized water for many times, and then drying the product to obtain the graphene-silver nano particle composite material. The method is simple, convenient, easy, environment-friendly and efficient; and silver nano particles in the prepared composite material are distributed narrowly, have a uniform particle size (about 25 nm), can be better inserted into graphene slices and can effectively prevent aggregation of the graphene.

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 nano particle composite material. Background technique [0002] Graphene is a new type of carbon material that has been extensively studied in recent years. Its structure is a two-dimensional honeycomb lattice structure formed by the close packing of a single layer of carbon atoms. Due to its excellent electrical, thermal and mechanical properties, graphene has become a hot research material in just a few years after its advent. Due to its unique two-dimensional nanostructure, graphene has become an ideal nanocomposite component to prepare graphene composite materials. The inherent excellent properties of graphene also make graphene-based composite materials present many excellent properties and have received great attention. At present, graphene composite materials have shown some superior properties and potential appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50B22F9/24B82Y40/00
Inventor 于美刘鹏瑞刘建华李松梅安军伟
Owner BEIHANG UNIV
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