Method for preparing ultra-long silver nanowires through trace-salt-assisted polyol method

A technology of polyol method and silver nanowire, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of difficult to realize large-scale industrial production, low aspect ratio of silver nanowire, production To solve the problem of high cost, achieve the effect of low cost, good dispersion and short reaction time

Inactive Publication Date: 2016-12-21
UNIV OF JINAN
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  • Application Information

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Problems solved by technology

Although the template method can better control the morphology of silver nanowires, the size of the nanowires is strictly controlled by the size of the template, and the production cost is high and the yield is low, making it difficult to achieve large-scale industrial production.
The polyol method has the characteristics of simple operation, low cost, and high yield, and has become the most commonly used preparation method for silver nanowires, but the silver nanowires prepared by the conventional polyol method have a low aspect ratio.

Method used

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  • Method for preparing ultra-long silver nanowires through trace-salt-assisted polyol method
  • Method for preparing ultra-long silver nanowires through trace-salt-assisted polyol method

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Experimental program
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Embodiment 1

[0017] Embodiment 1: (1) get the anhydrous FeCl of 0.0018 g 3 Added to 100 mL of EG solution to prepare FeCl 3 / EG solution, and take 15 mL for later use; (2) Add 0.34g PVP to the above 15 mL FeCl 3 / EG solution at 170 o Heating and stirring under C conditions; (3) 0.13 g of AgNO 3 Dissolve in 5 mL ethylene glycol solution; (4) Take 0.030 g of AgNO 3 Join in step (2), at 170 o Stir at a slow speed under C heating conditions; (5) gradually add the solution prepared in step (3) dropwise to the solution prepared in step (4) within 10 min, at 170 o Continue to stir slowly under the condition of C, and the reaction time is 0.5 h; (6) After cooling the solution prepared in step (5) at room temperature, use a mixture of acetone and ethanol (1:1) and ethanol solution at 9000 rpm respectively Centrifuge and wash 3 times, then disperse in ethanol solution.

Embodiment 2

[0018] Embodiment 2: (1) get the anhydrous FeCl of 0.0018 g 3 Added to 100 mL of EG solution to prepare FeCl 3 / EG solution, and take 15 mL for later use; (2) Add 0.34 g PVP to the above 15 mL FeCl 3 / EG solution at 170 o Heating and stirring under C conditions; (3) 0.16 g of AgNO 3 Dissolve in 5 mL ethylene glycol solution; (4) Take 0.030 g of AgNO 3 Join in step (2), at 170 o Stir at a slow speed under C heating conditions; (5) the solution prepared in step (3) is gradually added dropwise to the solution prepared in step (4) within 5 min, at 170 o Continue to stir slowly under the condition of C, and the reaction time is 0.5 h; (6) After cooling the solution prepared in step (5) at room temperature, use acetone and ethanol mixture (1:1) and ethanol solution at 9000 rpm respectively Centrifuge and wash 3 times, then disperse in ethanol solution.

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Abstract

The invention discloses a method for preparing ultra-long silver nanowires through a trace-salt-assisted polyol method. The method includes the following steps that firstly, FeCl3 is added into an ethylene glycol (EG) solution; secondly, polyvinylpyrrolidone (PVP) is added into the FeCl3 / EG solution and heated and stirred; thirdly, AgNO3 is dissolved in the EG solution; fourthly, AgNO3 is added into the mixture obtained in the second step and heated and stirred; fifthly, the solution prepared in the third step is gradually added into the solution prepared in the fourth step dropwise and reacts for 0.2-5 h, room temperature cooling and centrifugal cleaning are conducted, and the silver nanowires high in length-diameter ratio can be obtained. The method is easy to operate, good in repeatability and stability and capable of being used for mass production.

Description

technical field [0001] The invention belongs to the field of metal nanomaterials, and relates to a method for preparing silver nanowires, in particular to a method for preparing ultra-long silver nanowires by a trace salt-assisted polyol method. Background technique [0002] In recent years, transparent conductive materials have received more and more attention and are widely used in solar cells, touch screens, light-emitting diodes, and flexible thin-film displays. At present, the traditional transparent conductive material indium tin oxide (ITO) has been difficult to meet people's needs due to its high brittleness, high production cost, and lack of indium mineral resources. Silver nanowires have excellent electrical and thermal conductivity, better flex resistance, strong adsorption capacity and unique optical properties, and are considered to be the most likely material to replace traditional ITO transparent electrodes. [0003] At present, the methods for preparing silv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00B82Y30/00B22F1/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/0547
Inventor 杨晓朋乔振松曹丙强段广彬刘凤
Owner UNIV OF JINAN
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