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Preparation method for copper/silver nanowires of core-shell structures

A technology of copper nanowires and nanowires, which is applied in the field of preparation of copper/silver core-shell nanowires, can solve the problems affecting the performance of metal nanowires, looseness, loose silver layer structure, etc., and achieve low preparation and preservation costs, Good stability and high repeatability

Active Publication Date: 2016-06-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the silver layer structure of the silver-plated copper nanowires prepared by the prior art is generally loose and not compact, which will directly affect the performance of the metal nanowires.

Method used

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  • Preparation method for copper/silver nanowires of core-shell structures
  • Preparation method for copper/silver nanowires of core-shell structures
  • Preparation method for copper/silver nanowires of core-shell structures

Examples

Experimental program
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Effect test

Embodiment 1

[0056] (1) equipped with sodium hydroxide (NaOH) and copper nitrate (CuNO 3 ) aqueous solution, the concentrations are respectively 15mol / L and 0.1mol / L;

[0057] (2) The copper nitrate solution prepared in step (1) is added to the sodium hydroxide solution placed in the single-necked flask, wherein the volume ratio of the copper nitrate solution to the sodium hydroxide solution is 1 / 20, and the two are 31.5ml in total ; Then add 415 μL of ethylenediamine (EDA), then place the flask in an oil bath and stir thoroughly, and heat to 70°C;

[0058] (3) add 85ωt% hydrazine hydrate (N 2 h 4 .H 2 0) 18 μL of solution, fully stirred for 2 to 3 minutes, and left to stand for 35 minutes after insulated to form a bright Cu nanowire film floating on the upper layer of the solution;

[0059] (4) collect the product Cu nanowires obtained in step (3), first wash and shake with deionized water, centrifuge at 6000-8000 rpm for 10 minutes, discard the supernatant; wash and shake with deioni...

Embodiment 2

[0070] (1) equipped with sodium hydroxide (NaOH) and copper nitrate (CuNO 3 ) aqueous solution, the concentrations are respectively 15mol / L and 0.1mol / L;

[0071] (2) The prepared copper nitrate solution is added to the sodium hydroxide solution placed in the single-necked flask, wherein the volume ratio of the copper nitrate solution to the sodium hydroxide solution is 1 / 20, and the two are 31.5ml in total; Diamine (EDA) 415 μL, then, place the flask in an oil bath, stir well, and heat to 70°C;

[0072] (3) add 85ωt% hydrazine hydrate (N to the mixed solution that step (2) obtains 2 h 4 .H 2 0) 18 μL of solution, fully stirred for 2 to 3 minutes, and left to stand for 35 minutes after insulated to form a bright Cu nanowire film floating on the upper layer of the solution;

[0073] (4) Collect the Cu nanowires obtained in step (3), first wash and oscillate with deionized water, centrifuge at 6000 to 8000 rpm for 10 min, discard the supernatant; wash and oscillate again wit...

Embodiment 3

[0082] (1) equipped with sodium hydroxide (NaOH) and copper nitrate (CuNO 3 ) aqueous solution, the concentrations are respectively 15mol / L and 0.1mol / L;

[0083] (2) The prepared copper nitrate solution is added to the sodium hydroxide solution placed in the single-necked flask, wherein the volume ratio of the copper nitrate solution to the sodium hydroxide solution is 1 / 20, and the two are 31.5ml in total; Diamine (EDA) 415 μL, then, place the flask in an oil bath, stir well, and heat to 65°C;

[0084] (3) add 85ωt% hydrazine hydrate (N 2 h 4 .H 2 0) 18 μL of solution, fully stirred for 2 to 3 minutes, and left to stand for 1 hour after insulated to form a bright Cu nanowire film floating on the upper layer of the solution;

[0085] (4) Collect the Cu nanowires obtained in step (3), first wash and oscillate with deionized water, centrifuge at 6000 to 8000 rpm for 10 min, discard the supernatant; wash and oscillate again with deionized water and centrifuge 3 times;

[00...

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Abstract

The invention discloses a preparation method for copper / silver nanowires of core-shell structures. The preparation method comprises the steps of 1, preparing the copper nanowires, cleaning the copper nanowires and then dispersing the copper nanowires into water; 2, adding thiourea into mixed liquid in the step 1 and fully stirring the thiourea and the mixed liquid; 3, preparing silver nitrate solutions, adding the silver nitrate solutios into the mixed liquid obtained in the step 2 drop by drop, and stirring the silver nitrate solutios and the mixed liquid in a light-shaded mode; 4, filtering and cleaning the mixed liquid obtained in the step 3 for obtaining the copper / silver nanowires of the core-shell structures. The copper / silver nanowires of the core-shell structures prepared through the method are compact copper-based nanowires coated with silver uniformly; silver shells are reduced and generated through copper, combination of the core-shell structures is tight, and the stability of the nanowires is good; the preparation method is simple, end products just need to be dispersed in ethyl alcohol for being stored, and the preparation and storage cost is low.

Description

technical field [0001] The invention relates to the technical field of chemical silver plating, in particular to a method for preparing copper / silver core-shell nanowires. Background technique [0002] With the rapid development of transparent optoelectronic devices, flexible optoelectronic devices, and new high-efficiency solar cells, the demand for transparent conductive thin film electrodes is increasing. Indium tin oxide (ITO) is now widely used as a transparent conductive film, but because it has the rare element In and its conductivity limitation, it is prepared with nanowires such as Ag and Cu with better conductivity and higher content in the earth's crust. Transparent conductive electrodes have received great attention. [0003] At present, the research and application of Ag nanowire transparent conductive film has been realized, and excellent light transmittance and conductivity have been obtained. However, due to the material cost of Ag itself and the loss of the...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/0547B22F1/17
Inventor 李东升袁梦杨德仁
Owner ZHEJIANG UNIV
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