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Method of preparing silver nanowire by utilization of hydrothermal method

A technology of silver nanowires and hydrothermal method, which is applied in the direction of nanotechnology, can solve the problems of unsuitable for large-scale production of reaction liquid, small amount of reactants, low efficiency, etc., achieves huge application potential, low sensitivity of process parameters, Good process stability

Inactive Publication Date: 2013-05-08
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has disadvantages such as a small amount of reactants (milliliter level) and the solution needs to be added dropwise, resulting in low efficiency, and is not suitable for mass production of a large number of reaction solutions.

Method used

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  • Method of preparing silver nanowire by utilization of hydrothermal method
  • Method of preparing silver nanowire by utilization of hydrothermal method
  • Method of preparing silver nanowire by utilization of hydrothermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Add 34g of silver nitrate to 20L of ethylene glycol, stir and dissolve at room temperature to obtain a solution of silver nitrate in ethylene glycol with a concentration of 0.01M;

[0022] 2) Add 66.6g of PVP and 22mg of sodium chloride into 4L of ethylene glycol, stir and dissolve at room temperature to obtain an ethylene glycol PVP solution with a PVP concentration of 0.15M and a sodium chloride concentration of 0.09mM;

[0023] 3) Pour the ethylene glycol PVP solution into the ethylene glycol silver nitrate solution, stir until evenly mixed, and obtain the reaction mother liquor.

[0024] 4) Put the reaction mother liquor into a self-heating reactor with a capacity of 30L, raise the temperature to 160°C, and react for 3 hours;

[0025] 5) After the reaction is completed, centrifuge the reaction solution at 2000rpm, remove the supernatant, add acetone to wash, then centrifuge at 2000rpm, then add ethanol to wash, and centrifuge at 4000rpm after washing to obtain ab...

Embodiment 2

[0029] 1) Add 1.7Kg of silver nitrate to 100L of ethylene glycol, stir and dissolve at room temperature to obtain a solution of silver nitrate in ethylene glycol with a concentration of 0.1M.

[0030] 2) Add 5Kg of PVP and 0.745g of potassium chloride into 100L of ethylene glycol, stir and dissolve at room temperature to obtain an ethylene glycol PVP solution with a PVP concentration of 0.45M and a potassium chloride concentration of 0.1mM.

[0031] 3) Pour the ethylene glycol PVP solution into the ethylene glycol silver nitrate solution, stir until evenly mixed, and obtain the reaction mother liquor.

[0032] 4) In a hydrothermal reactor with a capacity of 200L, heat the mixed reaction mother liquor to 180°C for 2.5h.

[0033] 5) After the reaction was completed, the reaction solution was centrifuged at 2000 rpm, the supernatant was removed, washed with acetone, and centrifuged at 2000 rpm; finally, ethanol was added to wash and centrifuged at 4000 rpm to obtain about 1000 g ...

Embodiment 3

[0037] 1) Add 6.8Kg of silver nitrate to 200L of ethylene glycol, stir and dissolve at room temperature to obtain a solution of silver nitrate in ethylene glycol with a concentration of 0.2M.

[0038] 2) Add 6.66Kg of PVP and 2.69g of copper chloride to 200L of ethylene glycol, stir and dissolve at room temperature to obtain an ethylene glycol PVP solution with a PVP concentration of 0.3M and a copper chloride concentration of 0.1mM.

[0039] 3) Pour the ethylene glycol PVP solution into the ethylene glycol silver nitrate solution, stir until evenly mixed, and obtain the reaction mother liquor.

[0040] 4) In a hydrothermal reactor with a capacity of 500L, heat the mixed reaction mother liquor to 170°C for 5h.

[0041] 5) After the reaction is completed, the reaction solution is centrifuged at 2000 rpm, the supernatant is removed, washed with acetone, and centrifuged at 2000 rpm. Finally, ethanol was added for washing and centrifuged at 4000 rpm to obtain about 4000 g of silv...

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Abstract

The invention relates to a method of preparing silver nanowire by utilization of a hydrothermal method. The steps including: directly mixing ethylene glycol PVP solution which contains metal chloride with the concentration of 0.01M-2MPVP and the concentration of 1*10M-1*10-2M with ethylene glycol silver nitrate solution with the concentration of 0.01M-1M at normal temperature, stirring the mixed solution to be uniformed mixed, obtaining mixed reaction mother solution; the volume ratio of ethylene glycol silver nitrate solution to ethylene glycol PVP solution is 1:1-10:1; the molar ratio of silver nitrate to the PVP in the mixed reaction mother solution is 1:10-10:1, and the molar ration of silver nitrate to metal chloride is 10:1-104:1; putting the mixed reaction mother solution into an reaction kettle, warming the mixed reaction mother solution to 160 DEG C - 180 DEG C to carry out reduction reaction, the silver salt in the mother solution is restored, and silver nanowire is obtained. The method of preparing silver nanowire by utilization of the hydrothermal method has the advantage of being simple and high-efficient, no need of being preheated when the preliminary reaction is carried out at the normal temperature, easy to control of reaction conditions, and especially applicable to mass production.

Description

technical field [0001] The invention relates to nanometer material preparation technology, in particular to a method for preparing silver nanowires in large quantities by using a hydrothermal method. technical background: [0002] Silver nanowires have attracted much attention as a new type of one-dimensional functional material. In recent years, many studies have shown that silver nanowires have great application potential in the fields of transparent electrodes, solar cells, organic light-emitting diodes, surface-enhanced Raman, and biological sciences. [0003] In the preparation of silver nanowires, Xia Younan et al. [Sun, Y.; Gates, B.; Mayers, B.; Xia, Y.Nano Lett.2002,2,165.Sun, Y.; ,14,833.Sun,Y.;Y in,Y.;Mayers,B.T.;Herricks,T.;Xia,Y.Chem.Mater.2002,14,4736] The polyalcohol reduction method proposed to prepare silver nanowires is the current application The most method. The method utilizes a soft template method to grow silver wires under the premise of prefabrica...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
Inventor 付绍云黄贵文
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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