Synthetic method of silver nanowire

A synthesis method and technology of silver nanowires, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of complex operation and uneven morphology of silver nanowires, and achieve broad development prospects. , uniform diameter, good interaction effect

Active Publication Date: 2019-10-25
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is complicated to operate, and only a small amount of silver nanowires with uneven morphology can be obtained.

Method used

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  • Synthetic method of silver nanowire
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  • Synthetic method of silver nanowire

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preparation example Construction

[0028] The invention provides a kind of synthetic method of silver nanowire, comprises the following steps:

[0029] a) dissolving polyvinylpyrrolidone in an alcohol solvent, controlling the temperature below 40°C, adding silver nitrate and chloride and mixing evenly to obtain a mixed solution;

[0030] b) after sealing the mixed solution obtained in step a), performing a reaction to obtain silver nanowires.

[0031] In the invention, polyvinylpyrrolidone is firstly dissolved in an alcohol solvent, the temperature is controlled below 40 DEG C, and then silver nitrate and chloride are added and mixed uniformly to obtain a mixed solution. In the present invention, there is no special limitation on the source of the polyvinylpyrrolidone (PVP), and commercially available products well known to those skilled in the art can be used. In the present invention, the selective adsorption of the PVP can make the silver nanocrystals grow along a specific direction, which is beneficial to ...

Embodiment 1

[0048] (1) Add 40mL of glycerol into a three-necked flask, add 1g of PVP, and stir in a 60°C oil bath for 30min to completely dissolve the PVP; then take out the flask and cool it in ice water to lower the temperature of the solution to 40°C Next, 0.3 mL of silver nitrate (0.5 g) solution and 0.2 mL of sodium chloride (30 mg) solution were added and mixed uniformly to obtain a mixed solution.

[0049] (2) Transfer the mixed solution obtained in step (1) into a 50 mL polytetrafluoroethylene reactor, heat in an oven at 180° C. for 16 h, take it out and cool to room temperature to obtain silver nanowires (50 mL of silver nanowire solution).

[0050] The conversion efficiency of the synthesis method provided in Example 1 of the present invention is 74.8%, and the concentration of silver nanowires in the solution is 5.925 mg / mL.

Embodiment 2

[0052] Adopt the synthetic method that embodiment 1 provides, difference is: the consumption of all reagents is enlarged to original 10 times, other conditions are unchanged; Obtain silver nanowire (the silver nanowire solution of 500mL, refer to figure 1 Shown; Further precipitation of silver nanowires obtained, see figure 2 shown).

[0053] The transmission electron microscope picture of the silver nanowire obtained by the synthesis method provided by the embodiment of the present invention 2 can be found in image 3 shown by image 3 It can be seen that the above-mentioned silver nanowires are uniform in size, with a diameter of about 40 nm.

[0054] The conversion efficiency of the synthesis method provided in Example 2 of the present invention is 88.5%, and the concentration of silver nanowires in the solution is 7.025 mg / mL.

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Abstract

The invention provides a synthetic method of a silver nanowire. The method comprises the following steps that a, polyvinylpyrrolidone is dissolved in an alcohol solvent, the temperature is controlledto be below 40 DEG C, silver nitrate and chloride are added to be evenly mixed, and a mixed solution is obtained; and b, the mixed solution obtained in the step a is sealed and is subjected to the reaction, and the silver nanowire is obtained. Compared with the prior art, the synthetic method of the silver nanowire adopts the specific raw material, the specific synthetic steps, conditions and parameters are combined, mutual effect is achieved, and through one-step reaction, large-scale synthesis of the silver nanowire is achieved. The method is simple, the obtained silver nanowire is uniform in size, the foundation is provided for subsequent functional application, the experiment result shows that the conversion efficiency of the synthetic method is 69.85% to 88.5%, the concentration of the silver nanowire in the solution is 5.54mg / mL to 7.025mg / mL, the diameter of the silver nanowire is uniform, and is about 40 nm, the method can be further applied to preparing of silver nanowire inkused for a conductive circuit, and the development prospect is wide.

Description

technical field [0001] The invention relates to the technical field of nanomaterial synthesis, and more specifically relates to a method for synthesizing silver nanowires. Background technique [0002] Silver is a soft, white, metallic transition metal with the highest electrical, thermal and reflective conductivity of all metals. The British "Nature-Communication" (Nat.Commun 2015 No. 6) pointed out that compared with other silver materials, one-dimensional silver nanowires are the most basic material, and have excellent electrical and thermal conductivity, which deserves our further research. Research. [0003] At present, the following reports can be seen about the synthesis methods of silver nanowires: [0004] "Materials Chemistry Journal A" (Journal of Materials Chemistry A.2016, Volume 4, page 11366) has reported a method for the hydrothermal synthesis of silver nanowires using glucose as a reducing agent, which specifically includes the following steps: silver nitr...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/24B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00B22F1/0547B22F1/07
Inventor 俞书宏王康刘建伟
Owner UNIV OF SCI & TECH OF CHINA
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