A method for regulating the diameter of silver nanowires by using the amount of sodium chloride

A technology of silver nanowires and sodium chloride, applied in the direction of nanotechnology, can solve the problems of changing the length of silver nanowires, and achieve the effects of low cost, mild reaction conditions, and simple preparation process

Active Publication Date: 2016-08-24
山东利特纳米技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Patent 201110311631.1 discloses a method for preparing metallic silver nanowires with adjustable length and diameter, but this method has the following two defects: (1) This method changes the diameter of silver nanowires while changing the diameter of silver nanowires. (2) The minimum diameter of the silver nanowires obtained by this method is only 80 nanometers

Method used

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  • A method for regulating the diameter of silver nanowires by using the amount of sodium chloride
  • A method for regulating the diameter of silver nanowires by using the amount of sodium chloride
  • A method for regulating the diameter of silver nanowires by using the amount of sodium chloride

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Experimental program
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Effect test

Embodiment 1

[0028] Preparation of silver nanowires with a diameter of 30 nm

[0029] (1) Mix and dissolve 0.47g silver nitrate, 0.2mL water and 1mL glycerol at room temperature to make solution A;

[0030] (2) Add 4.4mg of sodium chloride, 2.1g of polyvinylpyrrolidone and 59mL of glycerol to a 250mL three-neck round-bottom flask in sequence, cover the three-neck round-bottom flask with a stopper, and suspend in an oil bath at 180 degrees Celsius Solution B was prepared by heating for 1 hour.

[0031] (3) Add solution A to solution B and keep it warm at 180 degrees Celsius for 15 minutes to obtain silver nanowires.

[0032] (4) After the reaction, the reaction solution was centrifuged, and the lower precipitate was washed to obtain silver nanowires. The prepared silver nanowires have an average diameter of 30 nanometers and a length of 2-20 micrometers.

Embodiment 2

[0034] Preparation of silver nanowires with a diameter of 40 nm

[0035] (1) Mix and dissolve 0.47g silver nitrate, 0.2mL water and 1mL glycerol at room temperature to make solution A;

[0036] (2) Add 17.7mg of sodium chloride, 2.1g of polyvinylpyrrolidone and 59mL of glycerol in sequence to a 250mL three-neck round-bottom flask, cover the three-neck round-bottom flask with a stopper, and suspend in an oil bath at 180 degrees Celsius Solution B was prepared by heating for 1 hour.

[0037] (3) Add solution A to solution B and keep it warm at 180 degrees Celsius for 15 minutes to obtain silver nanowires.

[0038] (4) After the reaction, the reaction solution was centrifuged, and the lower precipitate was washed to obtain silver nanowires. The prepared silver nanowires have an average diameter of 40 nanometers and a length of 2-20 micrometers.

Embodiment 3

[0040] Preparation of silver nanowires with a diameter of 60 nm

[0041] (1) Mix and dissolve 0.47g silver nitrate, 0.2mL water and 1mL glycerol at room temperature to make solution A;

[0042] (2) Add 35.4mg of sodium chloride, 2.1g of polyvinylpyrrolidone and 59mL of glycerol to a 250mL three-neck round-bottom flask in sequence, cover the three-neck round-bottom flask with a stopper, and suspend in an oil bath at 180 degrees Celsius Solution B was prepared by heating for 1 hour.

[0043] (3) Add solution A to solution B and keep it warm at 180 degrees Celsius for 15 minutes to obtain silver nanowires.

[0044] (4) After the reaction, the reaction solution was centrifuged, and the lower precipitate was washed to obtain silver nanowires. The prepared silver nanowires have an average diameter of 60 nanometers and a length of 2-20 micrometers.

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Abstract

The present invention relates to a method for controlling the diameter of silver nanowires by using the amount of sodium chloride. The method is realized by the following measures: (1) Mix 0.47g of silver nitrate with 0.2mL of water and 1mL of glycerol at room temperature Dissolve to make solution A; (2) Add 1‑100mg sodium chloride, 2.1g polyvinylpyrrolidone and 59mL glycerol to a 250mL three-neck round bottom flask in turn to make solution B; (3) Add solution A to the solution In B, keep warm at 160-200° C. for 15 minutes to 4 hours, centrifuge the reaction solution, and wash the lower precipitate to obtain silver nanowires. The method is based on the polyol reduction method. By simply changing a parameter, that is, the amount of sodium chloride, the diameter of the metal silver nanowire can be adjusted conveniently. The preparation process is simple, no inert gas protection is required, and the reaction conditions are mild. , The cost is low, the use of chemicals is green, environmentally friendly and low-toxic, and it is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a method for adjusting and controlling the diameter of silver nanowires through the dosage of sodium chloride, and belongs to the technical field of silver nanowire materials. Background technique [0002] Silver nanowire is a new type of one-dimensional nano-noble metal material. Compared with particle-shaped nanomaterials, silver nanowires have the characteristics of large specific surface area, high surface activity, excellent electrical conductivity, and excellent catalytic performance, as well as a unique surface plasmon resonance effect. At present, this material has been widely used in transparent conductive electrodes, flexible display screens, surface-enhanced Raman technology, biomarkers, imaging and biodetection technologies, functional nanodevices and other fields, and has received widespread attention worldwide. [0003] Many scientific research results have proved that the shape and size of nanomaterials have a s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 郑逸群姚茂茂孙明娟
Owner 山东利特纳米技术有限公司
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