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Method for preparing metal silver nanostructure in water solution

A nanostructure and aqueous solution technology, which is applied in the field of preparing metallic silver nanostructures, can solve the problems of irregular nanostructure, complex operation, and single size, and achieve the effects of simple preparation process, low reaction temperature, and low cost

Inactive Publication Date: 2012-07-11
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the shortcomings of nano-silver in the prior art, such as irregular shape, single size, and complicated operation, the present invention provides a method for preparing metallic silver nanostructures in aqueous solution, which can prepare nano-silver with adjustable shape and size. Metal silver nanostructure, simple operation, no inert gas protection, low reaction temperature, good repeatability

Method used

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  • Method for preparing metal silver nanostructure in water solution
  • Method for preparing metal silver nanostructure in water solution
  • Method for preparing metal silver nanostructure in water solution

Examples

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Effect test

Embodiment 1

[0027] 1.1 Mix 3 mL of silver nitrate aqueous solution with a concentration of 30 mM and 10 mL of sodium citrate aqueous solution, then add 3 mL of sodium chloride and polyvinylpyrrolidone aqueous solution, mix well, add 1.5 mg of sodium borohydride powder, and stir Finally, a uniform aqueous solution is obtained, wherein the weight ratio of silver nitrate / sodium chloride / sodium citrate / polyvinylpyrrolidone / sodium borohydride is 6:1:5:3:0.5.

[0028] 1.2 Take 10 mL of the aqueous solution described in Example 1.1, put it in an oil bath at 100 °C, and react at a constant temperature for 32 h.

[0029] 1.3 After the reaction was finished, silver nanospheres with an average diameter of 23 nm were obtained after centrifugation and washing, such as figure 1 shown.

Embodiment 2

[0031] 2.1 Mix 2 mL of silver nitrate aqueous solution with a concentration of 450 mM and 10 mL of sodium citrate aqueous solution, then add 3 mL of sodium chloride and polyvinylpyrrolidone aqueous solution, mix well, add 1.5 mg of sodium borohydride powder, and stir Finally, a uniform aqueous solution is obtained, wherein the weight ratio of silver nitrate / sodium chloride / sodium citrate / polyvinylpyrrolidone / sodium borohydride is 6:1:5:7:0.5.

[0032]2.2 Take 10 mL of the aqueous solution described in Example 2.1, put it in an oil bath at 90 °C, and react at a constant temperature for 26 h.

[0033] 2.3 After the reaction was finished, silver nanospheres with an average diameter of 8.5 nm were obtained after centrifugation and washing, such as figure 2 shown.

Embodiment 3

[0035] 3.1 Mix 0.6 mL of 100 mM silver nitrate aqueous solution with 12 mL of ascorbic acid aqueous solution, then add 2 mL of potassium chloride and N-methylpyrrolidone aqueous solution, mix and stir evenly, add 1.5 mg of sodium borohydride powder, and stir A uniform aqueous solution is obtained, wherein the weight of silver nitrate / potassium chloride / ascorbic acid / N-methylpyrrolidone / sodium borohydride is 6:1:5:7:0.5.

[0036] 3.2 Take 10 mL of the aqueous solution described in Example 3.1, put it in an oil bath at 80 °C, and react at a constant temperature for 40 h.

[0037] 3.3 After the reaction, silver nanospheres with an average diameter of 80 nm were obtained after centrifugation and washing.

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Abstract

The invention discloses a method for preparing a metal silver nanostructure in water solution, which includes the steps: determining types and proportions of initial reactants according to requirements of different morphologies and evenly mixing the initial reactants to obtain precursor water solution; growing silver nanostructures in the precursor water solution at the constant temperature of 50-105 DEG C; and centrifugally separating and washing reaction solution to obtain silver nanostructures of different morphologies. Inert gas for protection is omitted, reaction temperature is low, the preparation process is simple, the cost is low, and the method overcomes the shortcomings of complicated preparation procedures, low yield, high cost and the like of a traditional polyhydroxy reduction method, a traditional illumination method and a traditional oxidation reduction method, and has important significance for industrial mass production and practical application of the silver nanostructures of different morphologies.

Description

technical field [0001] The invention relates to a method for preparing a metallic silver nanostructure in an aqueous solution, and belongs to the technical field of nano silver preparation. Background technique [0002] Silver nanostructures with different morphologies have become a very active research area due to their potential applications in nanoelectronics, magnetism, biosensors, data storage, catalysis, surface-enhanced Raman spectroscopy, and antibacterial. The focus of research on nanomaterials has gradually shifted from the preparation of nanomaterials to the development of functional nanodevices. The miniaturization and complexity of nanodevices put forward higher requirements for the diversification of the morphology of nanomaterials. The performance of metallic nanomaterials largely depends on the morphology, size, composition, crystallinity, and structure of the particles. Therefore, the preparation of silver nanostructures with controllable morphology and siz...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 杨萍张玉兰马谦曹永强张爱玉
Owner UNIV OF JINAN
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