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Method of regulating and controlling lengths of silver nanorods in polyhydric alcohol reduction method through hydrogen peroxide

A silver nanorod, hydrogen peroxide technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem that the length cannot be easily adjusted, and achieve uniqueness, low cost and simple process. Effect

Active Publication Date: 2015-05-13
山东利特纳米技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for regulating the length of silver nanorods that is simple in process, low in cost and does not require a special reaction device in view of the problem that the length cannot be conveniently regulated in the current polyol reduction preparation method of silver nanorods

Method used

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  • Method of regulating and controlling lengths of silver nanorods in polyhydric alcohol reduction method through hydrogen peroxide
  • Method of regulating and controlling lengths of silver nanorods in polyhydric alcohol reduction method through hydrogen peroxide
  • Method of regulating and controlling lengths of silver nanorods in polyhydric alcohol reduction method through hydrogen peroxide

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Experimental program
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Effect test

Embodiment 1

[0029] (1) Mix 1.0g silver nitrate and 1mL (1.3g) glycerol at room temperature, stir and dissolve to obtain solution A;

[0030] (2) Add 10mg of sodium chloride, 10g of polyvinylpyrrolidone, 59mL (77g) of glycerol and 10μL (0.00001g) of hydrogen peroxide into a three-necked round-bottomed flask in sequence, cover the three-necked round-bottomed flask with a stopper, and suspend in In an oil bath at 180°C, stir and react for 1 hour to obtain solution B;

[0031] (3) Add solution A to solution B, the mass ratio of solution A to solution B is 1:39.6, then stir and react at 180°C for 15 minutes, centrifuge the reaction solution, remove the lower precipitate, wash with water, and obtain a length of 2.10± 0.28 µm silver nanorods.

Embodiment 2

[0033] (1) Mix 1.0g silver nitrate and 1mL (1.3g) glycerol at room temperature, stir and dissolve to obtain solution A;

[0034] (2) Add 10mg of sodium chloride, 10g of polyvinylpyrrolidone, 59mL (77g) of glycerol and 100μL (0.0001g) of hydrogen peroxide into the three-necked round-bottomed flask in turn, cover the three-necked round-bottomed flask with a stopper, and suspend in In an oil bath at 180°C, stir and react for 1 hour to obtain solution B;

[0035] (3) Add solution A to solution B, the mass ratio of solution A to solution B is 1:39.6, then stir and react at 180°C for 15 minutes, centrifuge the reaction solution, remove the lower precipitate, wash with water, and obtain a length of 1.35± 0.22 µm silver nanorods.

Embodiment 3

[0037] (1) Mix 1.0g silver nitrate and 1mL (1.3g) glycerol at room temperature, stir and dissolve to obtain solution A;

[0038] (2) Add 10mg of sodium chloride, 10g of polyvinylpyrrolidone, 59mL (77g) of glycerol and 400μL (0.0004g) of hydrogen peroxide into the three-necked round-bottomed flask in sequence, cover the three-necked round-bottomed flask with a stopper, and suspend in In an oil bath at 180°C, stir and react for 1 hour to obtain solution B;

[0039] (3) Add solution A to solution B, the mass ratio of solution A to solution B is 1:39.6, then stir and react at 180°C for 15 minutes, centrifuge the reaction solution, remove the lower precipitate, wash with water, and obtain a length of 1.12± 0.23 micron silver nanorods.

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Abstract

The invention provides a method of regulating and controlling lengths of silver nanorods in a polyhydric alcohol reduction method through hydrogen peroxide. The method comprises the following steps that silver nitrate and glycerol are blended and stirred and dissolved to obtain a solution A; sodium chloride, polyvinylpyrrolidone, the glycerol and the hydrogen peroxide are blended and stirred and reacted at the temperature which ranges from 160 DEG C to 200 DEG C for 15 minutes to 4 hours to obtain a solution B; the solution A is mixed in the solution B and reacted at the temperature which ranges from 160 DEG C to 200 DEG C for 15 minutes to 4 hours, a centrifugal separation of a reaction solution is conducted, a lower layer sediment is obtained and washed, and the silver nanorods with different lengths are obtained. The method is simple in technology, low in cost, the lengths of the silver nanorods can be changed only by adding the hydrogen peroxide, the lengths of the silver nanorods can be regulated and controlled according to the adding amount of the hydrogen peroxide, the diameter of the silver nanorods has no obvious changes while the lengths are changing, the uniqueness of regulation and control is guaranteed, and the method is incapable of introducing impurities and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and relates to a method for regulating the length of silver nanorods through hydrogen peroxide. Background technique [0002] Metal nanomaterials have special properties different from macroscopic bulk materials, and the shape also has a very important influence on their physical and chemical properties. For silver nanomaterials, common shapes include cubes, octahedrons, spheres, rods, wires, disks, and so on. Among them, rod-shaped silver nanocrystals have attracted much attention due to their structural anisotropy (different lengths in the xy direction and z direction), and their optical properties have attracted much attention. This characteristic has been used in ion detection, molecular dyeing, and surface-enhanced Raman spectroscopy (SERS ), surface fluorescence enhancement, biomedicine and other fields have shown important application value. [0003] The current methods for r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y30/00B82Y40/00
Inventor 郑逸群姚茂茂
Owner 山东利特纳米技术有限公司
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