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Method for preparing silver dendritic matter

A technology of dendrites and silver nitrate, which is applied in the preparation of dendrites and the production of metal nano/micro materials, can solve the problems of difficult preparation of high-purity silver dendrites, difficulties in separation and purification, and achieve easy laboratory The effect of preparation and industrial production, simple operation and mild preparation conditions

Inactive Publication Date: 2013-11-13
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are patent documents and scientific magazines that have introduced several preparation methods of silver dendrites, but these preparation methods often contain substances such as compound reducing agents and surfactants, so it is difficult to separate and purify, and it is not easy to obtain high-purity silver dendrites.

Method used

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  • Method for preparing silver dendritic matter
  • Method for preparing silver dendritic matter
  • Method for preparing silver dendritic matter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] After washing 5.0g of copper sheet or copper wire, place it in 5 mL of 10 mmol / L silver nitrate aqueous solution for replacement reaction, the reaction temperature is 20°C, and the reaction time is 5min, take out the copper sheet loaded with silver dendrites, Wash 10 times with deionized water, place it in absolute ethanol, after ultrasonic treatment, take out the copper sheet, centrifuge and separate the ethanol liquid, the precipitate is silver dendrite, the TEM picture of the product is as follows figure 1 , 2 shown.

[0021] Depend on figure 1 , 2 It can be seen that the obtained product is dendritic, composed of 100-200nm silver flakes, and the length can reach 10μm.

Embodiment 2

[0023] After washing 3.0g of copper mesh, place it in 5 mL of 100 mmol / L silver nitrate aqueous solution for replacement. The reaction temperature is 30°C, and the reaction time is 10min. Washed 10 times, the optical micrograph of the product is as follows image 3 shown.

[0024] Depend on image 3 It can be seen that the obtained product is branched, and the length can reach 200 μm.

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Abstract

The invention discloses a method for preparing a silver dendritic matter and relates to the technical field of production of metallic nano / micro materials. The method comprises the steps of putting copper into a silver nitrate aqueous solution, carrying out replacement reaction at the temperature of 20-50 DEG C, and washing solids by using deionized water after the reaction is ended, thus obtaining the silver dendritic matter. According to the method, copper and silver nitrate have replacement reaction in the aqueous solution, and the prepared silver is of a dendritic structure which is composed of silver particles with the particle diameter of 10-300 nm and the size of 1-500 microns. The method has the advantages that the preparation steps are simple, the preparation conditions are mild, and the product is easy to purify.

Description

technical field [0001] The invention relates to the technical field of metal nano / micro material production, in particular to the technical field of preparation of silver dendrites. Background technique [0002] Silver nanoparticles are being widely used due to their unique properties. Nowadays, a large number of studies report the preparation technology of silver particles with different shapes and sizes. Among them, the silver with dendritic structure has a supramolecular structure, large specific surface area and excellent connectivity between different regions in the structure. Substrate materials superior in enhanced spectroscopy testing have received extensive attention. There are patent documents and scientific magazines that have introduced several preparation methods of silver dendrites, but these preparation methods often contain substances such as compound reducing agents and surfactants, so it is difficult to separate and purify, and it is not easy to obtain hig...

Claims

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Application Information

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IPC IPC(8): C30B7/14C30B29/02C30B29/66
Inventor 杨继生姜正东
Owner YANGZHOU UNIV
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