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
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[0028] The present invention provides a method for synthesizing silver nanowires, including the following steps:
[0029] a) Dissolve polyvinylpyrrolidone in an alcohol solvent, control the temperature below 40°C, then add silver nitrate and chloride and mix uniformly to obtain a mixed solution;
[0030] b) After sealing the mixed solution obtained in step a), react to obtain silver nanowires.
[0031] The invention first dissolves polyvinylpyrrolidone in an alcohol solvent, controls the temperature below 40°C, and then adds silver nitrate and chloride to mix uniformly to obtain a mixed solution. In the present invention, there is no special restriction 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 effect of the PVP can make the silver nanocrystals grow along a specific direction, which is beneficial to the formation of silver nanowires of uni...
Example Embodiment
[0047] Example 1
[0048] (1) Put 40mL of glycerol into a three-necked flask, add 1g of PVP, stir in a 60℃ oil bath for 30 minutes to completely dissolve the PVP; then take out the flask, cool in ice water, and reduce the temperature of the solution to 40℃ Next, add 0.3 mL of silver nitrate (0.5 g) solution and 0.2 mL of sodium chloride (30 mg) solution and mix them evenly to obtain a mixed solution.
[0049] (2) Transfer the mixed solution obtained in step (1) into a 50mL polytetrafluoroethylene reactor, heat it in an oven at 180°C for 16h, take it out and cool it to room temperature to obtain silver nanowires (50mL 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 the silver nanowires in the solution is 5.925 mg / mL.
Example Embodiment
[0051] Example 2
[0052] Using the synthesis method provided in Example 1, the difference is: the amount of all reagents is increased by 10 times, and other conditions remain unchanged; silver nanowires (500mL silver nanowire solution, see figure 1 As shown; for further precipitation of silver nanowires, see figure 2 Shown).
[0053] For the transmission electron microscope image of the silver nanowires obtained by the synthesis method provided in Example 2 of the present invention, see image 3 Shown by image 3 It can be seen that the 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 the silver nanowires in the solution is 7.025 mg / mL.
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