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Preparation method for silver nanorings

A silver nanometer and nanosilver technology, which is applied in the field of preparation of silver nanorings, can solve the problems of low yield of silver nanorings and the like, and achieve the effect of high yield

Active Publication Date: 2018-12-04
SHENZHEN HUAKE COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent with publication number CN102658373A discloses a method for preparing silver nanorings, but the yield of silver nanorings produced by this method is low

Method used

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  • Preparation method for silver nanorings
  • Preparation method for silver nanorings
  • Preparation method for silver nanorings

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preparation example Construction

[0029] A kind of preparation method of silver nano ring of the present invention, comprises the following steps:

[0030] (1) Weigh polyvinylpyrrolidone and silver nitrate according to the molar ratio of 1-10:1, polyvinylpyrrolidone includes small molecular weight polyvinylpyrrolidone with a molecular weight of 55000-58000 and large molecular weight polyvinylpyrrolidone with a molecular weight of 360000-1300000 ,;

[0031] (2) respectively dissolving small molecular weight polyvinylpyrrolidone and large molecular weight polyvinylpyrrolidone in ethylene glycol to make small molecular weight polyvinylpyrrolidone-ethylene glycol solution and large molecular weight polyvinylpyrrolidone-ethylene glycol solution for subsequent use;

[0032] (3) silver nitrate is dissolved in the polyvinylpyrrolidone-ethylene glycol solution of small molecular weight under refrigerated environment to make silver nitrate-polyvinylpyrrolidone-ethylene glycol solution for subsequent use;

[0033] (4) T...

Embodiment 1

[0046] A preparation method for silver nanorings, comprising the following steps:

[0047] (1) Take polyvinylpyrrolidone and silver nitrate according to the molar ratio of 2:1. Polyvinylpyrrolidone includes small molecular weight polyvinylpyrrolidone with molecular weight of 55000 and large molecular weight polyvinylpyrrolidone with molecular weight of 360000. Small molecular weight polyvinylpyrrolidone The mass ratio with large molecular weight polyvinylpyrrolidone is 1:1;

[0048] (2) respectively dissolving small molecular weight polyvinylpyrrolidone and large molecular weight polyvinylpyrrolidone in ethylene glycol to make small molecular weight polyvinylpyrrolidone-ethylene glycol solution and large molecular weight polyvinylpyrrolidone-ethylene glycol solution for subsequent use;

[0049] (3) silver nitrate is dissolved in the polyvinylpyrrolidone-ethylene glycol solution of small molecular weight at 0 ℃ to make silver nitrate-polyvinylpyrrolidone-ethylene glycol solutio...

Embodiment 2

[0053] A preparation method for silver nanorings, comprising the following steps:

[0054] (1) Take polyvinylpyrrolidone and silver nitrate according to the molar ratio of 8:1. Polyvinylpyrrolidone includes small molecular weight polyvinylpyrrolidone with molecular weight of 58000 and large molecular weight polyvinylpyrrolidone with molecular weight of 1300000. Small molecular weight polyvinylpyrrolidone The mass ratio with large molecular weight polyvinylpyrrolidone is 0.8:1;

[0055] (2) respectively dissolving small molecular weight polyvinylpyrrolidone and large molecular weight polyvinylpyrrolidone in ethylene glycol to make small molecular weight polyvinylpyrrolidone-ethylene glycol solution and large molecular weight polyvinylpyrrolidone-ethylene glycol solution for subsequent use;

[0056] (3) silver nitrate is dissolved in the polyvinylpyrrolidone-ethylene glycol solution of small molecular weight at 5 ℃ to make silver nitrate-polyvinylpyrrolidone-ethylene glycol solu...

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Abstract

The invention relates to the technical field of metal nanomaterial preparation, in particular to a preparation method for silver nanorings. According to the preparation method, polyvinylpyrrolidone ofdifferent molecular mass is selected as a surface protectant, and silver nitrate is dissolved in a polyvinylpyrrolidone-ethylene glycol solution of small molecular mass in a freezing environment. Anions can be retarded or restrained from being reduced to zero-valent silver. Finally, formation of nanosilver particles jointly cladded and complexed by polyvinylpyrrolidone of big molecular mass and small molecular mass is benefited. Polyvinylpyrrolidone of different molecular mass is provided with different selective adsorptivity on silver, and different stability is provided with different influence degrees on growth rate of silver atoms along different crystal planes. Generation of the silver nanorings is benefited more; and meanwhile, productive rate is higher. According to the preparationmethod for the silver nanorings, the silver nanorings prepared are proved with prefect circles, smooth surface and oval sections; and moreover, the silver nanorings are provided with outstanding crystal structures and can be used as a transparent flexible conductive material.

Description

technical field [0001] The invention relates to the technical field of preparing metal nanomaterials, in particular to a method for preparing silver nanorings. Background technique [0002] Metal nanomaterials refer to metal materials with at least one dimension in the three-dimensional space at the nanoscale or composed of them as basic units. At present, a variety of metal nanomaterials such as gold, silver, nickel, iron, and copper have been studied. At the same time, these metal nanomaterials have various shapes such as spherical, strip, rectangular, and polyhedral. These metal nanoparticles with different morphologies can produce unique physical and chemical properties, thereby exhibiting excellent properties that many bulk metals do not have. These properties play an important role in the fields of electricity, optics, and magnetism. [0003] As a kind of precious metal, silver is widely favored by people because of its stable properties, soft texture and high thermal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
CPCB82Y40/00B22F9/24B22F2009/245B22F1/0549B22F2301/255B22F2304/054B22F1/07
Inventor 王海波曾西平靳世东吴俊青李晓明
Owner SHENZHEN HUAKE COMM TECH CO LTD
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