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Chemical preparation method of Ag nanoparticle

A silver nanometer and particle technology, applied in the field of solution chemical method synthesis, can solve the problems of difficult reaction, complex structure, high production cost, etc., and achieve the effect of good modification effect and rich source.

Inactive Publication Date: 2007-07-11
SHENYANG POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: the present invention provides a chemical preparation method of silver nanoparticles, the purpose of which is to solve the problem that the existing production method is difficult to control the reaction and needs to prepare a complex reaction precursor and a high-boiling organic solvent as the reaction medium and production cost. problems in large

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  • Chemical preparation method of Ag nanoparticle
  • Chemical preparation method of Ag nanoparticle
  • Chemical preparation method of Ag nanoparticle

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Add 122mg of sodium oleate, 34mg of silver nitrate, and 20ml of toluene into a 250ml three-necked reaction flask. After the temperature is slowly raised to 80°C, react at a constant temperature for 1 hour under the condition of electromagnetic stirring to obtain a yellow silver-containing Hydrosol of rice gold particles. Centrifuge the initial product obtained from the above reaction, discard the supernatant, wash the precipitate with acetone and deionized water 2-3 times, and then dry the precipitate under vacuum for 12 hours at 40°C. The nano-silver particles with surfactant sodium oleate as encapsulating agent are obtained. The obtained silver nanoparticles can be preferably dispersed in non-polar media such as toluene and chloroform, and can also be preferably dispersed in polar media such as water and ethanol. The results of ultraviolet-visible spectrum measurement show that silver nanoparticles in the above non-polar and polar dispersion systems can produce obvio...

Embodiment 2

[0023] Add 61mg of sodium oleate, 17mg of silver nitrate, and 20ml of toluene into a 250ml three-necked reaction flask. After the temperature is slowly raised to 90°C, react at a constant temperature for 1 hour under the condition of electromagnetic stirring to obtain a yellow silver-containing Hydrosol of rice gold particles. Centrifuge the initial product obtained from the above reaction, discard the supernatant, wash the precipitate with acetone and deionized water 2-3 times, and then dry the precipitate under vacuum for 12 hours at 40°C. The nano-silver particles with surfactant sodium oleate as encapsulating agent are obtained. The obtained silver nanoparticles can be preferably dispersed in non-polar media such as toluene and chloroform, and can also be preferably dispersed in polar media such as water and ethanol. The results of ultraviolet-visible spectrum measurement show that silver nanoparticles in the above non-polar and polar dispersion systems can produce obviou...

Embodiment 3

[0025] Add 31mg of sodium linoleate, 10mg of silver perchlorate, and 20ml of xylene into a 250ml three-necked reaction flask. After the temperature is slowly raised to 120°C, react at a constant temperature for 2 hours under the condition of electromagnetic stirring to obtain A yellow hydrosol containing silver, rice and gold particles. Centrifuge the initial product obtained from the above reaction, discard the supernatant, wash the precipitate with acetone and deionized water 2-3 times, and then dry the precipitate under vacuum for 12 hours at 40°C. The nano-silver particles with surfactant sodium oleate as encapsulating agent are obtained. The obtained silver nanoparticles can be preferably dispersed in non-polar media such as toluene and chloroform, and can also be preferably dispersed in polar media such as water and ethanol. The results of ultraviolet-visible spectrum measurement show that silver nanoparticles in the above non-polar and polar dispersion systems can prod...

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Abstract

The invention relates to a method for preparing silver nanometer particles, wherein it is characterized in that: it uses silver nitrate or silver perchlorate as initial reactant; uses sodium oleate or linolic acid sodium as surface activator; mixing them at free ratio; uses toluene, dimethylbenzene, and sub dichlorobenzene or chloroform reaction medium; in organic phase, obtaining silver nanometer particles. The invention has simple control, without preparing forward element and organic solvent with high boiling point, with low cost. The inventive silver nanometer particles can be dispersed in non-polar medium and polar medium.

Description

Technical field: [0001] The invention belongs to the synthesis technology of solution chemical method, in particular to a chemical method for preparing silver nanoparticles. Background technique: [0002] Since silver nanoparticles can produce characteristic absorption peaks in the visible or near-infrared band. Therefore, in the past two decades, research on silver nanomaterials has attracted widespread attention worldwide. At present, silver nanoparticles have shown good application prospects in the preparation of organic / inorganic nano-hybrid light-emitting devices, nano-biosensors and polymer materials with antibacterial functions. [0003] According to the different chemical environments in which silver nanoparticles are located, their preparation methods can be divided into three categories: organic phase, aqueous phase and two-phase reaction. The first method mainly uses sodium borohydride as a reducing agent. Under the action of specific surfactant molecules, under...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 陈延明李凤红李继新马少君王立岩
Owner SHENYANG POLYTECHNIC UNIV
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