Preparation method of silver nanowires

A technology of silver nanowires and silver salts, which is applied in the field of preparation of nanomaterials and can solve problems such as slow reaction and long preparation time

Active Publication Date: 2013-05-15
SHENZHEN INST OF ADVANCED TECH
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  • Abstract
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  • Claims
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Problems solved by technology

As we all know, the one-dimensional nanowire structure is not the most ideal structure for material growth. In order to ensure that the material can grow along the one-dimensional direction, the process of preparing nanowires by the traditional solution chemical method needs to use a relatively mild reduction. agent, which leads to a very slow reaction, which generally takes hours or even days, and the preparation time is relatively long

Method used

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  • Preparation method of silver nanowires

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preparation example Construction

[0030] Such as figure 1 Shown, the preparation method of the silver nanowire of one embodiment, comprises the following steps:

[0031] Step S10, adding the water-soluble silver salt and the dispersant into the aqueous solution containing the polyhydroxy liquid organic matter, and ultrasonically dispersing to obtain a mixed solution.

[0032] The water-soluble silver salt is at least one selected from silver nitrate and silver acetate. When the water-soluble silver salt is silver nitrate, silver nitrate has better solubility in most solvents such as water and ethanol.

[0033] The molar ratio of water-soluble silver salt and dispersant is 1:1~1:10. When the mol ratio of water-soluble silver salt and dispersing agent is 1:5, the silver nanowire prepared is better, and this is because the amount of dispersing agent is too much, easily generates granular silver, and the amount of dispersing agent is insufficient, and It is not conducive to the growth of auxiliary nano-silver w...

Embodiment 1

[0058] In a 200W ultrasonic water bath, mix 6.8g of silver nitrate and 22.2g of polyvinylpyrrolidone K30 and add it into an aqueous solution containing 100mL of ethylene glycol (the volumes of ethylene glycol and deionized water are 50mL and 50mL respectively), and after uniform dispersion and dissolution A clear solution was obtained.

[0059] 5.8 mg of sodium chloride was added to the above clear solution, and after dissolving, a clear reaction mother liquor was obtained.

[0060] The reaction mother liquor was transferred to a self-pressurized reactor, and the self-pressurized reactor was placed in an oil bath at 120° C., and the mixture was obtained after reacting for 20 minutes.

[0061] The above mixture was cooled to room temperature, and the precipitate was collected after centrifugation, then washed with deionized water, and dried in vacuum to obtain solid silver nanowires.

[0062] For field emission scanning electron microscopy (FE-SEM) samples, the powder sample i...

Embodiment 2

[0066] In a 200W ultrasonic water bath, mix 13.6g of silver nitrate and 44.4g of polyvinylpyrrolidone K30 and add it into an aqueous solution containing 100mL of ethylene glycol (the volumes of ethylene glycol and deionized water are 50mL and 50mL respectively), and after uniform dispersion and dissolution A clear solution was obtained.

[0067] 11.7 mg of sodium chloride was added to the above clear solution, and after dissolving, a clear reaction mother liquor was obtained.

[0068] The reaction mother liquor was transferred to a self-pressurized reactor, and the self-pressurized reactor was placed in an oil bath at 120° C., and the mixture was obtained after reacting for 20 minutes.

[0069] The above mixture was cooled to room temperature, and the precipitate was collected after centrifugation, then washed with absolute ethanol, and dried in vacuum to obtain solid silver nanowires.

[0070] For field emission scanning electron microscopy (FE-SEM) samples, the powder sampl...

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Abstract

Provided is a preparation method of silver nanowires. The preparation method of the silver nanowires includes the following steps: adding water-solubility silver salt and dispersing agents into aqueous solution comprising polyhydroxy liquid organic matters, and obtaining mixed liquor after ultrasonic dispersion; adding water-solubility halide into the mixed liquor, and obtaining reaction mother liquor after dissolving; reacting the mother liquor under 100-190 DEG C for 10-60 minutes, and obtaining mixtures; and collecting sediment after centrifugation of the mixtures, drying the sediment after washing of the sediment and obtaining the silver nanowires. The preparation method of the silver nanowires is short in preparation time.

Description

technical field [0001] The invention relates to the technical field of preparation of nanomaterials, in particular to a preparation method of silver nanowires. Background technique [0002] With the development of today's science and technology, materials are required to have the characteristics of intelligence, refinement, high-density integration of components, high energy density and ultra-fast transmission, which provides a broad application space for nanotechnology and nanomaterials. Due to their special optical, point, electrical and magnetic properties, nanomaterials have become a hot research topic. Due to its superiority in performance size and potential application in modern electronics industry, it has attracted more and more attention of scientists. In nanomaterials, because the nanoscale size is equivalent to or smaller than the physical characteristic size such as the wavelength of light, De Broglie wavelength, and superconducting state coherence length, the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 孙蓉梁先文赵涛胡友根
Owner SHENZHEN INST OF ADVANCED TECH
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