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Preparation method of colloidal silver nanometer granule

A silver nanoparticle and nanoparticle technology, applied in the field of preparation of colloidal silver nanoparticles, can solve the problems of uneven distribution, low light utilization rate, unfavorable production and preparation, etc., and achieve the effect of easy particle size and continuous large-scale production.

Inactive Publication Date: 2008-06-11
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional photochemical preparation method, not only the light utilization rate is low, but also the size of the prepared particles is large and the distribution is uneven, which is not conducive to large-scale production and preparation.

Method used

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  • Preparation method of colloidal silver nanometer granule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: referring to accompanying drawing, at first, the K15 aqueous solution that concentration is 2mg / mL and the silver nitrate solution that concentration is 250 μ g / mL are mixed by the mass ratio of silver ion in K15 and silver nitrate as 15: 1; Then, after obtaining Acetone is added to the mixed solution, and the mass ratio of the added acetone to silver ions in silver nitrate is 8:1; finally, the mixed solution is irradiated by a 200W ultraviolet lamp 2 with a radiation wavelength of 253.7nm and a constant flow pump 3 to 30mL The flow rate of / min flows through the quartz serpentine tube 1 with a quartz tube diameter of 20 mm, a quartz tube spacing of 2 mm, and a spiral tube length of 5 cm to obtain silver nanoparticles with uniform size distribution and an average particle diameter of 10 nm.

Embodiment 2

[0010] Example 2: First, the K25 aqueous solution with a concentration of 1 mg / mL and the silver nitrate solution with a concentration of 5000 μg / mL are mixed according to the mass ratio of K25 and silver ions in silver nitrate as 8:1; then, in the obtained mixed solution Add acetone, and the mass ratio of the added acetone to silver ions in silver nitrate is 10:1; finally, the mixed solution is irradiated by a 100W ultraviolet lamp with a radiation wavelength of 300nm and flows through the quartz crystal at a flow rate of 2mL / min. The diameter of the tube is 2 mm, the distance between the quartz tubes is 5 mm, and the length of the spiral tube is 160 cm, so that silver nanoparticles with uniform size distribution and an average particle size of 20 nm can be obtained.

Embodiment 3

[0011] Embodiment 3: first, the K30 aqueous solution that is 0.5mg / mL is mixed with the silver nitrate solution that concentration is 3000 μ g / mL by K30 and the mass ratio of silver ion in silver nitrate is 5: 1; Then, in the mixed solution that obtains Add acetone to the solution, the mass ratio of the added acetone to the silver ions in the silver nitrate is 5:1; finally, the mixed solution is irradiated with ultraviolet light with a radiation wavelength of 253.7nm and a power of 1200W with a constant flow pump at a flow rate of 10mL / min. Silver nanoparticles with a uniform size distribution and an average particle diameter of 15 nm can be obtained through a quartz serpentine tube with a diameter of 18 mm, a distance between the quartz tubes of 20 mm, and a spiral tube length of 30 cm.

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Abstract

The invention discloses a making method of colloidal nanometer particle, which comprises the following steps: mixing the PVP solution and silver nitrate solution at 1-15:1 weight ratio; adding acetone in the mixing solution at 5-10:1 weight ratio for acetone and silver ion of silver nitrate; flowing the quartz snake pipe through radiating by 253.7-300 nm wavelength, irradiating by 14-2000 W ultraviolet at 0.5-60 mL / min speed. The invention doesn't produce toxic material or pollute environment, which is easy to control the grain size in the large-scale continuous production.

Description

technical field [0001] The invention relates to a preparation method of colloidal silver nanoparticles, in particular to a preparation method of colloidal silver nanoparticles. technical background [0002] Silver nanoparticles have great potential application prospects in nanoelectronics, optoelectronic devices, nano-coating materials, nano-catalysis, and nano-silver antibacterial materials. Especially antibacterial materials based on nano silver particles have been widely used in daily life, such as broad spectrum antibacterial drugs based on nano silver, textiles based on nano silver antibacterial properties, cosmetics based on nano silver and so on. [0003] There have been a lot of literature reports on the preparation methods of silver nanoparticles, but in order to obtain monodisperse silver nanoparticles, some long-chain thiols and long-chain amines are used for the preparation of colloidal silver nanoparticles, or more expensive hydroboration substances as reducing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 杨生春张露张太蔚王仕兴杨志懋丁秉钧
Owner XI AN JIAOTONG UNIV
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