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Method for preparing gold-copper alloy nano particles

A nanoparticle, gold-copper alloy technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve the effect of mild reaction conditions

Active Publication Date: 2018-07-27
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still few reports on the synthesis methods of small particle size (below 10nm) gold-copper alloy particles.

Method used

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  • Method for preparing gold-copper alloy nano particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation and characterization of gold-copper alloy nanoparticles (~2 nm):

[0025] (1) Preparation of copper precursor solution and gold precursor solution

[0026] The cupric chloride that buys is mixed with deionized water 40 milliliters of the copper precursor solution of 0.06 mol / liter, and adds appropriate tetrachloroauric acid, obtains cupric chloride: tetrachloroauric acid mol ratio is the mixed solution of 1:1, Stir well. In addition, sodium borohydride was prepared into a 2.4 mol / liter reducing agent solution with deionized water.

[0027] (2) Phase transfer process

[0028] Add 80 ml of toluene to the above mixed solution, and add a sufficient amount of 0.7 g of tetraoctyl ammonium bromide to form an organic phase, stir for 40 minutes, transfer the copper particles and chloroauric acid to the organic phase, and form a deep red orange . Separate again through a separatory funnel to remove the aqueous layer. The remaining organic mixed solution was trans...

Embodiment 2

[0034] Preparation and characterization of gold-copper alloy nanoparticles (~5 nm):

[0035] (1) Preparation of copper precursor solution and gold precursor solution

[0036] The cupric chloride that buys is mixed with deionized water 52 milliliters of the copper precursor solution of 0.04 mol / liter, and adds appropriate tetrachloroauric acid, obtains cupric chloride: tetrachloroauric acid mol ratio is the mixed solution of 1:1, Stir well. In addition, sodium borohydride was prepared with deionized water to form a 2.0 mol / liter reducing agent solution.

[0037] (2) Phase transfer process

[0038] Add 80 ml of toluene to the above mixed solution, and add a sufficient amount of 0.7 g of tetraoctyl ammonium bromide to form an organic phase, stir for 40 minutes, transfer the copper particles and chloroauric acid to the organic phase, and form a deep red orange . Separate again through a separatory funnel to remove the aqueous layer. The remaining organic mixed solution was tr...

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Abstract

The invention discloses a method for preparing gold-copper alloy nano particles. The method includes the specific steps that (1) a mixed solution of a copper precursor and a gold precursor is prepared, wherein in the mixed solution, the concentration of the copper precursor is the same as the concentration of the gold precursor; (2) methylbenzene and tetraoctyl ammonium bromide are added into themixed solution to be sufficiently stirred, the copper precursor and the gold precursor are transferred into an organic phase, separation is achieved through a liquid dividing hopper, a water layer isremoved, and an organic mixed solution is obtained; and (3) under the inert atmosphere, after the organic mixed solution is stirred, a reducing agent aqueous solution is added drop by drop, room temperature stirring is continuously carried out after the reducing agent aqueous solution is completely added, liquid dividing is finally carried out, obtained nano gold-copper alloy suspension liquid isconcentrated, and the gold-copper alloy nano particles are obtained. According to the method, the organic phase is selected for providing a protection environment for the nano particles, and unstability, agglomeration and other phenomena easily caused when the nano particles are synthesized in a water phase are avoided; and adopted reaction conditions are soft, and a strategy is provided for preparing a duplex metal nano-alloy catalyst.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a method for preparing gold-copper alloy nanoparticles. Background technique [0002] The ability to control the synthesis of parameters such as composition and morphology of nanomaterials is an important prerequisite for promoting the development and application expansion of nanotechnology. [0003] Nanocatalysts are different from traditional catalysts in that they further expand the specific surface area and possess unique surface and structural properties, which is also the main driving force for nanocatalysis research. There are many reports on the design and synthesis of metal nanocatalysts, and alloy nanocatalysts are in a more prominent position in catalytic research. Au-Cu nanoalloys have aroused great interest due to their wide potential applications as bimetallic alloy catalysts with high electrical conductivity and excellent catalytic performance. F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/054B22F1/07
Inventor 成汉文朱丽莹汪翰清魏铭仪王荆刘昌林罗谨
Owner SHANGHAI INST OF TECH
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