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Sliver nanoparticles and production method thereof

A technology of nano-silver particles and silver salts, applied in the field of nanometers, to achieve the effect of reducing waste water and simple process

Inactive Publication Date: 2014-07-16
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the preparation process, sodium borohydride, ascorbic acid, and sodium citrate can only be used as reducing agents. When preparing Ag NPs, additional solvents and protective agents are required; while N,N-dimethylformamide and ethylene glycol can both It can be used as a reducing agent and as a solvent, but a protective agent must still be added

Method used

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  • Sliver nanoparticles and production method thereof
  • Sliver nanoparticles and production method thereof

Examples

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Effect test

Embodiment 1

[0030] Example 1: First, add 20 grams of CL into a 100 ml round-bottomed flask, heat to 60°C to make it melt completely; take 0.1 gram of AgNO 3 It was added to the above mixture, and the reaction was continued for 1 hour under stirring. After the reaction, 20 g of water was added to dissolve, and Ag NPs could be obtained after centrifugation.

Embodiment 2

[0031] Example 2: First, add 40 grams of CL into a 100 ml round-bottomed flask, heat it to 80°C to melt it completely; add 0.1 grams of PVP into the CL melt, and after the PVP is completely dissolved, take 0.3 grams of AgNO 3 Add to the mixture of CL melt and PVP, and continue to react for 3 hours under stirring. At the end of the reaction, 40 g of water was added to dissolve the caprolactam, and Ag NPs could be obtained after centrifugation.

Embodiment 3

[0032] Example 3: First, add 60 grams of CL into a 100 ml round-bottomed flask, heat it to 100°C to melt it completely; add 0.5 grams of PVP into the CL melt; after the PVP is completely dissolved, take 0.5 grams of AgNO 3 Add to the mixture of CL melt and PVP, and continue to react for 6 hours under stirring. At the end of the reaction, 60 g of water was added to dissolve the caprolactam, and Ag NPs could be obtained after centrifugation.

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Abstract

The invention provides sliver nanoparticles and a production method thereof. The sliver nanoparticles are made with, 20-200 parts of caprolactam, 0.1-0.2 part of sliver salt, and 0-11.1 parts of povidone. The caprolactam is used as reducing agent, AgNO3 or AgClO4 is added to melt of the reducing agent, and Ag+ is mixed and heated so as to evenly deposit to form black deposition which is the sliver nanoparticles. The caprolactam serves as both the reducing agent and solvent in a system; in the absence of PVP, the caprolactam further serves as protectant; accordingly, fewer other chemical agents are added, namely fewer waste water, waste gas and volatile components are produced, and economic efficiency and environment protection are achieved.

Description

technical field [0001] The invention relates to the field of nanotechnology, in particular to a nano silver particle and a preparation method thereof. [0002] Background technique [0003] In recent years, due to the unique small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect, noble metal nanoparticles have shown excellent and unique properties in terms of light, electricity, magnetism, corrosion resistance, and catalysis. This makes it a research focus in the field of nanomaterials. Compared with gold and platinum, silver has outstanding advantages in cost performance (Rycenga, M.; Cobley, C. M.; Zeng, J.; Li, W.; Moran, C. H.; Zhang, Q.; Qin, D.; Xia, Y. Chemical reviews, 2011, 111 (6), 3669-3712.), the reducing agents used in the preparation of silver nanoparticles (referred to as Ag NPs) mainly include sodium borohydride, ascorbic acid, sodium citrate, N,N -Dimethylformamide and ethylene glycol (Huang, T.; Xu, X. H. N. J. Ma...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 杨桂生段建平
Owner HEFEI GENIUS NEW MATERIALS
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