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Preparation method of nano-silver cube

A cube and nano-silver technology, which is applied in nanotechnology, metal processing equipment, transportation and packaging, etc., can solve the problems of unfavorable expansion of production, long dropping time, complicated process, etc., to save preparation time, short production time, The effect of simple process

Inactive Publication Date: 2018-08-07
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional polyol method has the following problems: (1) using a peristaltic pump to add silver nitrate and PVP solution at the same time, the cost is high and the adding time is long; (2) the preparation of nano silver with different shapes needs to be adjusted Acceleration; (3) The process is complicated, which is not conducive to expanding production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method of nanometer silver cubes, specifically comprising the following steps:

[0020] (1) Mix ethylene glycol and glycerin at a volume ratio of 1.5 to obtain a mixed solvent, and mix FeS at a ratio of 0.2g / L 2 Add to mixed solvent to obtain mixed solution A.

[0021] (2) Dissolving polyvinylpyrrolidone (PVP) and tetraethylammonium bromide in the mixed solvent of step (1) to obtain mixed solution B, the concentration of polyvinylpyrrolidone in mixed solution B is 30g / L, the concentration of tetraethylammonium bromide is 10g / L.

[0022] (3) Add mixed solution B dropwise to mixed solution A at a volume ratio of 1:1 to obtain mixed solution C, and dissolve silver nitrate in a mixed solvent at a ratio of 30 g / L to obtain mixed solution D.

[0023] (4) Add the mixed solution D dropwise to the mixed solution C at a volume ratio of 1:1 to obtain the mixed solution C to obtain the mixed solution E, and the dropping time is controlled within two minutes.

[00...

Embodiment 2

[0027] A preparation method of nanometer silver cubes, specifically comprising the following steps:

[0028] (1) Mix ethylene glycol and glycerin at a volume ratio of 1.6 to obtain a mixed solvent, and mix FeS at a ratio of 0.3g / L 2 Add to mixed solvent to obtain mixed solution A.

[0029] (2) Dissolving polyvinylpyrrolidone (PVP) and tetraethylammonium bromide in the mixed solvent of step (1) to obtain mixed solution B, the concentration of polyvinylpyrrolidone in mixed solution B is 35g / L, the concentration of tetraethylammonium bromide is 12g / L.

[0030] (3) Add mixed solution B dropwise to mixed solution A at a volume ratio of 1:1.1 to obtain mixed solution C, and dissolve silver nitrate in a mixed solvent at a ratio of 33 g / L to obtain mixed solution D.

[0031] (4) Add the mixed solution D dropwise to the mixed solution C at a volume ratio of 1:1.1 to obtain the mixed solution C to obtain the mixed solution E, and the dropping time is controlled within two minutes.

...

Embodiment 3

[0035] A preparation method of nanometer silver cubes, specifically comprising the following steps:

[0036] (1) Mix ethylene glycol and glycerin at a volume ratio of 1.8 to obtain a mixed solvent, and mix FeS at a ratio of 0.4g / L 2 Add to mixed solvent to obtain mixed solution A.

[0037] (2) Dissolving polyvinylpyrrolidone (PVP) and tetraethylammonium bromide in the mixed solvent of step (1) to obtain mixed solution B, the concentration of polyvinylpyrrolidone in mixed solution B is 40g / L, the concentration of tetraethylammonium bromide is 15g / L.

[0038] (3) Add mixed solution B dropwise to mixed solution A at a volume ratio of 1:1.3 to obtain mixed solution C, and dissolve silver nitrate in a mixed solvent at a ratio of 35 g / L to obtain mixed solution D.

[0039] (4) Add the mixed solution D dropwise to the mixed solution C at a volume ratio of 1:1.2 to obtain the mixed solution C to obtain the mixed solution E, and the dropping time is controlled within two minutes.

...

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PUM

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Abstract

The invention discloses a preparation method of a nano-silver cube, belonging to the technical field of three-dimensional nano-silver preparation. The method of the invention comprises the steps of using a mixed solution of ethylene glycol and glycerin as a solvent and a reducing agent, FeS2 as a controlling agent, and polyvinylpyrrolidone (PVP) and tetraethylammonium bromide as a surfactant, andusing silver nitrate to provide a silver source, so as to rapidly synthesize the nano-silver cube with assistance of microwaves. The method of the invention has the advantages that the raw material iseasy to obtain, the process is simple, the equipment is easy to obtain, the process is easy to operate, the production time is short, the efficiency is high, and the size of the product nano-silver cube is uniform.

Description

technical field [0001] The invention discloses a method for preparing nanometer silver cubes, which belongs to the technical field of three-dimensional nanometer silver preparation. Background technique [0002] Due to its unique physical and chemical properties, nano-silver materials are widely used in many fields. At present, the preparation of nano-silver cubes has become one of the research hotspots of nano-silver materials. For nano silver cubes, due to its high surface-enhanced Raman scattering (SERS) activity. It is widely used as a SERS substrate. And with the increase of nano-silver cube size, its SERS activity increases. Compared with the corner-cut silver nanocubes, the complete silver nanocubes have a stronger SERS signal. In order to expand the application range of nano-silver cubes, it is very important to develop a preparation method with simple process and low cost. [0003] In recent years, there are many methods for preparing nano-silver cubes, among w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F1/07
Inventor 甘国友徐杰阳光严继康杜景红易健宏
Owner KUNMING UNIV OF SCI & TECH
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