Simple and novel preparation method for silver and gold nano-particles
A technology of silver acetate and silver nitrate, applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of reducing agents and poor economical protection conditions, and achieve simple and economical preparation methods , the effect that the conditions are easy to control
Inactive Publication Date: 2014-10-01
INNER MONGOLIA UNIV OF TECH
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Problems solved by technology
[0005] In the process of preparing silver and gold nanometers, the current preparation methods still have the following disadvantages: (1) most preparation methods need to select specific reducing agents and suitable protection conditions (such as protective agents and protective atmospheres) to prepare silver, gold, and gold nanoparticles. gold nanoparticles and prevent their agglomeration
(2) The selected reducing agent and protection conditions are less economical
Method used
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Embodiment 1
[0023] Configure the mixed solution according to the table below, add it to a 25ml two-necked flask, and heat at 90°C for 2 hours to obtain nano-silver sols with different color depths.
[0024]
Embodiment 2
[0026] Configure the mixed solution according to the table below, add it to a 25ml two-necked flask, and heat at 90°C for 2 hours to obtain nano-silver sols with different color depths.
[0027]
Embodiment 3
[0029] Configure the mixed solution according to the table below, add it to a 25ml volumetric flask, and heat at 90°C for 2 hours to obtain gold nano-sols of different colors.
[0030]
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The invention belongs to the field of nano-material preparation, and provides a simple and novel preparation method for silver and gold nano-particles. The preparation method comprises the following steps of: taking silver acetate, silver nitrate and chloroauric acid as precursor preparation raw materials, taking a sulfonic acid surfactant as a reducing agent and a protecting agent, adjusting the pH value of a preparation system by adding substances of sodium carbonate or ammonia water and the like, and heating the reaction system in a certain temperature range to obtain the silver and gold nano-particles. The product obtained by the method provided by the invention has the characteristics of being uniform in particle size, good in dispersibility and stability, and the like; moreover, the sulfonic acid surfactant is low in price and easy to get, the production process is simple and low in cost; the method is another new preparation way for preparing the silver and gold nano-particles.
Description
Technical field: [0001] The invention is a novel and convenient method for preparing silver and gold nanoparticles. It is a new preparation method of liquid phase chemical reduction method. Background technique: [0002] At present, the preparation technology of silver and gold nanomaterials is very mature and there are many preparation methods. Mainly divided into physical methods and chemical methods. Physical methods mainly include physical crushing method, vacuum condensation method, mechanical grinding ball method and other methods. Chemical methods mainly include chemical reduction method, microemulsion method, template method, electrochemical method, ultrasonic assisted reduction and other methods. For these synthesis methods, each method has its own characteristics, and it is difficult to use simple standards or other criteria to evaluate the advantages and disadvantages of a certain method. Because the requirements for silver and gold nanomaterials may vary grea...
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Login to View More IPC IPC(8): B22F9/24B82Y40/00B82Y30/00
Inventor 杨柯利刘全生张顺白杰
Owner INNER MONGOLIA UNIV OF TECH