Silver/magnetic nanometer particle and its preparation method

A magnetic nanoparticle and nanoparticle technology, applied in the field of silver/magnetic nanoparticles with antibacterial effect, can solve the problems of small size of nanosilver particles, difficult to remove, and limit the application prospect of nanosilver sol

Inactive Publication Date: 2007-07-18
HUNAN UNIV
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  • Abstract
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Problems solved by technology

However, silver-based antibacterial agents currently on the market, especially nano-silver sol, are difficult to remove because the particle size of nano-silver is very small (usually less than 10nm) when treating water and aqueous solutions.
This greatly limits the application prospect of nano-silver sol in domestic water treatment, so it is urgent to solve the recycling problem of silver series water treatment agents after use

Method used

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  • Silver/magnetic nanometer particle and its preparation method
  • Silver/magnetic nanometer particle and its preparation method

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Effect test

Embodiment Construction

[0022] 1. Preparation of silver / magnetic nanoparticles

[0023] 1. Preparation of magnetic ferric iron tetroxide core. 2.7 g FeCl 3 ·6H 2 O dissolved in a small amount of ultrapure water, 1.0g FeCl 2 4H 2 O was dissolved in 2.5 ml of 2 mol / L hydrochloric acid. The above two solutions were mixed into the three-necked flask, and then 125 ml of 6 mol / liter ammonia water was added dropwise into the three-necked flask under stirring. During the dropwise addition, the solution began to slowly turn yellow and finally black. After the dropwise addition was completed, the reaction was continued for half an hour. The experiment was carried out under the protection of nitrogen. After the reaction, pour the obtained product into a beaker, separate it with a magnet, wash it with ultra-pure water for 3-5 times, dissolve it in 125 ml of ultra-pure water, and then add about 2 ml of 25% tetramethylammonium hydroxide , and finally obtained pure magnetic ferric oxide particles by vacuum ...

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Abstract

This invention discloses a silver / magnetic nanometer particle that has bacteriostatic effect and its preparation method. In aqueous phase of antiphase micro emulsion liquid system, silver nitrate cream uses magnetic ferroso-ferric oxide nanometer particle as inside core. Deposit simple substance silver on surface of ferroso-ferric oxide nanometer particle, prepare silver / magnetic nanometer particle having nucleocapsid structure. Silver / magnetic nanometer particle of this invention is of easy preparation method, good particle dispersibility, and uniform particle diameter. Simple substance silver of nanometer particle surface has good bacteriostatic effect. Ferroso-ferric oxide inside core of particle makes this nanometer particle have good magnetism by outside magnetic field effect. It can be convenient to reclaim and reuse from sample product that is bacteriostaticly processed.

Description

technical field [0001] The invention belongs to water treatment agent. Specifically relate to a kind of silver / magnetic nanoparticles with antibacterial effect, Background technique [0002] A variety of infectious diseases caused by microbial infection such as bacteria and viruses have been threatening human health. In order to improve people's level, effectively prevent the cross-infection of microorganisms between people, people and things, and things and things, and prevent the occurrence of various infectious diseases to the greatest extent, it is necessary to put forward more requirements on the aseptic state of the daily life environment. high demands. In order to create a clean and healthy living environment, all kinds of new antibacterial materials and drugs have been continuously developed, and the demand for antibacterial products also constitutes a potentially huge market. Silver and its compounds have been used as antibacterial agents in daily life since anci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/50
Inventor 王柯敏龚萍何晓晓谭蔚泓李惠敏胡建兵
Owner HUNAN UNIV
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