Preparation method for copper/silver heterojunction nano-particles

A nanoparticle and heterojunction technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as high price, and achieve the effect of solving difficult applications and simple and easy preparation methods.

Inactive Publication Date: 2014-04-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The melt atomization method requires special equipment, and the price of the equipment is relatively expensive, while the electroless plating method is easy to produce waste liquid, and the thickness of the coating has a lot to do with the plating solution and current density

Method used

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  • Preparation method for copper/silver heterojunction nano-particles
  • Preparation method for copper/silver heterojunction nano-particles
  • Preparation method for copper/silver heterojunction nano-particles

Examples

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Embodiment 1

[0032] A preparation method of copper / silver heterojunction nanoparticles, comprising the following steps:

[0033] (1) Under the condition of magnetic stirring (30 rpm), add 0.2L of 0.01mol / L sodium borohydride to 0.001L of 0.1mol / L CuCl at a rate of 1.5mL / min 2 2H 2 In the O solution, react for 1 hour; after the reaction, centrifuge the reaction solution, get the precipitate, and then wash the precipitate with absolute ethanol and distilled water successively to obtain a nano-copper sample;

[0034] (2) Ultrasonically disperse 2 grams of the nano-copper sample obtained in step (1) (120W, time 15 minutes) in glycerol to obtain a nano-copper solution with a mass fraction of 10%; then 5ml of 0.02mol / L AgNO 3 The solution was added to the nano-copper solution, and heated to 150 ° C for 2 hours to react. After the reaction, the reaction solution was centrifuged and the precipitate was taken, and the precipitate was washed with absolute ethanol and distilled water in sequence to ...

Embodiment 2

[0038] A preparation method of copper / silver heterojunction nanoparticles, comprising the following steps:

[0039] (1) Under the condition of magnetic stirring (150 rpm), add 0.2L of 0.01mol / L ascorbic acid solution to 0.1L of 0.5mol / L CuSO at a rate of 2ml / min 4 ·5H 2 In the O solution, react for 1 hour; after the reaction, centrifuge the reaction solution, get the precipitate, and then wash the precipitate with absolute ethanol and distilled water successively to obtain a nano-copper sample;

[0040] (2) Ultrasonically (120W, 15 minutes) disperse 3 grams of the nano-copper sample obtained in step (1) in ethylene glycol to obtain a nano-copper solution with a mass fraction of 3%; then 10ml of 0.01mol / L AgNO 3 The solution was added to the nano-copper solution, and heated to 100°C to react for 3 hours. After the reaction, the reaction solution was centrifuged and the precipitate was taken, and the precipitate was washed with absolute ethanol and distilled water in sequence t...

Embodiment 3

[0043] A preparation method of copper / silver heterojunction nanoparticles, comprising the following steps:

[0044] (1) Under the condition of magnetic stirring (120 rpm), add 0.02L0.01mol / L hydrazine hydrate solution to 0.1L0.2mol / L CuSO at a rate of 2ml / min 4 ·5H 2In the O solution, react for 1 hour; after the reaction, centrifuge the reaction solution, get the precipitate, and then wash the precipitate with absolute ethanol and distilled water successively to obtain a nano-copper sample;

[0045] (2) Ultrasonically (120W, 15min) disperse 0.3 g of the nano-copper sample obtained in step (1) in ethylene glycol to obtain a nano-copper solution with a mass fraction of 36%; then 30ml of 0.01mol / L AgNO 3 The solution was added to the nano-copper solution, and heated to 70°C for 6 hours to react. After the reaction, the reaction solution was centrifuged and the precipitate was taken, and the precipitate was washed with absolute ethanol and distilled water in sequence to obtain th...

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Abstract

The invention discloses a preparation method for copper/silver heterojunction nano-particles. The preparation method comprises the following steps of: (1) adding a reducer in copper salt solution with stirring, and reacting for 1-3 hours; performing centrifugal separation and precipitate extraction on the reaction solution after the reaction is concluded, so as to obtain nano-copper samples; (2) dispersing the nano-copper samples obtained in the step (1) in a solvent, so as to obtain nano-copper solution; then adding silver salt solution in the nano-copper solution, heating to 70-180 DEG C and reacting for 1-6 hours, and performing centrifugal separation and precipitate extraction on the reaction solution after the reaction is concluded, so as to obtain the copper/silver heterojunction nano-particles. According to the preparation method disclosed by the invention, the copper/silver heterojunction nano-particles are prepared by performing a replacement reaction on the surface layer of copper, and the reducer is added to disperse nano-copper during the preparation process, thus solving the technical problem that nano-copper powder is difficult to disperse; moreover, the preparation method is simple in process and low in preparation cost.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a method for preparing copper / silver heterojunction nanoparticles. Background technique [0002] In the past ten years, due to their unique chemical and physical properties, such as catalytic, conductive, optical and magnetic properties, metal nanoparticles have attracted great attention in the field of nanoscience and nanotechnology. Nano-copper has important application value in the fields of lubrication, catalysis, heat transfer fluid, electronic materials, etc. However, due to the high surface activity of nano-copper, it is easy to oxidize, which brings great difficulties to the large-scale production of nano-copper powder. Further application of nano-copper. In order to prevent the oxidation of copper, researchers at home and abroad have successively tried and explored methods such as boric acid solution treatment, phosphate solution treatment, and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F9/04B22F1/02B82Y40/00B82Y30/00
Inventor 张念椿胡建强
Owner SOUTH CHINA UNIV OF TECH
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