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Preparation method for nano-silver powder

A technology of nano-silver powder and silver source, applied in the direction of nano-technology, etc., can solve the problem that the preparation method of nano-silver powder cannot be combined with the preparation process, etc.

Pending Publication Date: 2020-05-19
SHENZHEN INST OF ADVANCED TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problem that the preparation method of nano-silver powder in the above-mentioned prior art cannot have the advantages of simplified preparation process, stable reaction, and controllable particle size of the product, the present invention provides a preparation method of nano-silver powder. The preparation method reacts in one step, and its reaction The system is simple, no additional reducing agent is added, and the particle size of nano-silver particles is controllable

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  • Preparation method for nano-silver powder

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preparation example Construction

[0030] Based on the fact that the preparation method of nano-silver powder in the prior art cannot have the problems of simple preparation process, stable reaction, and controllable product particle size, the present invention provides a preparation method of nano-silver powder. The preparation method is one-step reaction, the reaction system is simple, no additional reducing agent is added, and the particle size of the nano-silver particles is controllable.

[0031] The invention provides a kind of preparation method of nano-silver powder, comprising:

[0032] Step A: dissolving silver source and protective agent in polyol to prepare silver-containing solution.

[0033] The silver source is used to provide silver ions, and silver nitrate, silver trifluoroacetate, silver carbonate or silver acetate can be used. Other silver compounds are slightly soluble in polyols and have very little solubility, so silver nitrate is further preferred as the silver source.

[0034] The func...

Embodiment 1

[0056] (1) Weigh 2g of silver nitrate and 2g of polyvinylpyrrolidone into a beaker, add 100g of 1,2-propanediol, stir at room temperature at a speed of 100r / min until the solid particles are completely dissolved, and prepare a solution containing silver ions.

[0057] (2) Simultaneously weigh 0.2 g of sodium hydroxide, add 5 g of deionized water, stir at room temperature until completely dissolved, and prepare an alkaline solution.

[0058] (3) Mix the silver ion-containing solution and the alkaline solution, transfer the mixed solution to a 250mL hydrothermal reaction kettle, place the hydrothermal reaction kettle in an oven at 120°C for constant temperature reaction for 12h, and then naturally cool to room temperature . The reaction product is collected by centrifugation, washed and dried to obtain nano silver powder.

[0059] The nano silver powder of embodiment 1 is carried out X-ray diffraction (being called for short XRD) research, and the collection of illustrative pla...

Embodiment 2

[0062] (1) Weigh 4g of silver nitrate and 2g of sodium dodecylbenzenesulfonate and place it in a beaker, add 100g of ethylene glycol, stir at room temperature at a speed of 150r / min until the solid particles are completely dissolved, and prepare silver-containing ions solution.

[0063] (2) Simultaneously weigh 0.3 g of sodium hydroxide, add 6 g of deionized water, stir at room temperature until completely dissolved, and prepare an alkaline solution.

[0064] (3) Mix the silver ion-containing solution and the alkaline solution, transfer the mixed solution to a 250mL hydrothermal reaction kettle, place the hydrothermal reaction kettle in an oven at 130°C for 6 hours of constant temperature reaction, and then naturally cool to room temperature . The reaction product is collected by centrifugation, washed and dried to obtain nano silver powder.

[0065] Adopt scanning electron microscope to carry out scanning analysis to above-mentioned nano-silver powder, the electron microsco...

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Abstract

The invention discloses a preparation method for nano-silver powder. The preparation method for the nano-silver powder comprises the following steps that a silver source and a protective agent are dissolved in polyol to prepare a silver-containing solution; an alkaline solution is mixed with the silver-containing solution, and hydrothermal reaction is carried out at the reaction temperature of 120-200 DEG C; and a reaction product is collected and separated to obtain the nano-silver powder, wherein the particle size of nano-silver particles in the nano-silver powder is 50 nm - 600 nm. According to the preparation method for the nano-silver powder, the silver source and the polyol are taken as raw materials, and the nano-silver powder is obtained through hydrothermal method one-step reaction; and a reaction system of the preparation method is simple, the additional reducing agent does not need to be added, and the hydrothermal condition is controlled so that the control of the nano-silver particle size can be realized.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a preparation method of nanometer silver powder. Background technique [0002] "Nano" is a unit of length. In the field of nanotechnology research, the size of nanomaterials should be between 1nm and 100nm. The unique microstructure of nanomaterials makes them have small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect. These unique properties make nanomaterials widely used in thermal, optics, electricity, magnetism and catalysis. As a new type of material, nanomaterials have a lot of applications in many fields that are closely related to people in all walks of life. They have been widely used in catalysis science, electronic information science, photography technology and information rapid storage and other fields. Therefore, the study of nanomaterials and their related applications in many fields, especially the synthe...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00
Inventor 赵涛郝放朱朋莉胡友根梁先文孙蓉
Owner SHENZHEN INST OF ADVANCED TECH
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