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Preparation method of cobalt ferrite/polydopamine/silver composite nano-cube antibacterial agent

A polydopamine and cube technology, which is applied in the field of nanomaterials, can solve the problems of low silver content and insignificant bactericidal effect, and achieves the effect of a simple and convenient synthesis method.

Active Publication Date: 2021-03-16
甘肃兰博研创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, magnetic silver nanoparticles are generally spherical, with low silver content, and the bactericidal effect is not obvious

Method used

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  • Preparation method of cobalt ferrite/polydopamine/silver composite nano-cube antibacterial agent
  • Preparation method of cobalt ferrite/polydopamine/silver composite nano-cube antibacterial agent
  • Preparation method of cobalt ferrite/polydopamine/silver composite nano-cube antibacterial agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of Ag / AgCl-PDA-CoFe 2 o 4 The preparation method of magnetic nano cube antibacterial agent, it comprises the following steps:

[0026] Step 1. Synthesis of CoFe 2 o 4 Nanoparticles: 1.35g FeCl 3 ·6H 2 O and 0.59gCoCl 2 4H 2 O was dissolved in 20 mL of ethylene glycol solvent to form a clear solution, and 3.6 g of CH was added to the solution 3 COONa and 1.8g polyethylene glycol, and the mixture was stirred at a speed of 350rpm for 30 minutes, then the solution was transferred and sealed into a polytetrafluoroethylene stainless steel autoclave, reacted at 200°C for 8h, and cooled to room temperature; The black product was washed several times with ethanol and dried at 60°C for 6 hours to obtain CoFe with a particle size of 200nm 2 o 4 nanoparticles;

[0027] Step 2. Synthesis of hollow CoFe 2 o 4 Nanoparticles: take the CoFe synthesized in step 1 2 o 4 0.4 g of nanoparticles was washed 5 times with 0.076 mol / L glucose solution, transferred to a polyt...

Embodiment 2

[0045] A kind of Ag / AgCl-PDA-CoFe 2 o 4 The preparation method of magnetic nano cube antibacterial agent, it comprises the following steps:

[0046] Step 1. Synthesis of CoFe 2 o 4 Nanoparticles: 1.35g FeCl 3 ·6H 2 O and 0.59gCoCl 2 4H 2 O was dissolved in 20 mL of ethylene glycol solvent to form a clear solution, and 3.6 g of CH was added to the solution 3 COONa and 1.8g polyethylene glycol, and the mixture was stirred at a speed of 350rpm for 30 minutes, then the solution was transferred and sealed into a polytetrafluoroethylene stainless steel autoclave, reacted at 200°C for 8h, and cooled to room temperature; The product was washed several times with ethanol and dried at 60 °C for 6 h to obtain CoFe with a particle size of 200 nm. 2 o 4 nanoparticles;

[0047] Step 2. Synthesis of hollow CoFe 2 o 4 Nanoparticles: take the CoFe synthesized in step 1 2 o 4 0.4 g of nanoparticles was washed 5 times with 0.076 mol / L glucose solution, transferred to a polytetraflu...

Embodiment 3

[0054] A kind of Ag / AgCl-PDA-CoFe 2 o 4 The preparation method of magnetic nano cube antibacterial agent, it comprises the following steps:

[0055] Step 1. Synthesis of CoFe 2 o 4 Nanoparticles: 1.35g FeCl 3 ·6H 2 O and 0.59gCoCl 2 4H 2 O was dissolved in 20 mL of ethylene glycol solvent to form a clear solution, and 3.6 g of CH was added to the solution 3 COONa and 1.8g polyethylene glycol, and the mixture was stirred at a speed of 350rpm for 30 minutes, then the solution was transferred and sealed into a polytetrafluoroethylene stainless steel autoclave, reacted at 200°C for 8h, and cooled to room temperature; The product was washed several times with ethanol and dried at 60 °C for 6 h to obtain CoFe with a particle size of 200 nm. 2 o 4 nanoparticles;

[0056] Step 2. Synthesis of hollow CoFe 2 o 4 Nanoparticles: take the CoFe synthesized in step 1 2 o 4 0.3 g of nanoparticles, washed 5 times with 0.076 mol / L glucose solution, transferred to a polytetrafluoro...

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Abstract

The invention discloses a preparation method of a cobalt ferrite / polydopamine / silver composite nano cubic antibacterial agent. The method comprises the following steps: hollow CoFe2O4 particles whichare formed by mixed acid etching and have a particle size of 200 nm are used as substrates; a polydopamine solution is added for a reaction; then a silver ammonia solution prepared from a silver nitrate solution with a concentration of 9-11 g / L and ammonia water is added; pores of the hollow CoFe2O4 spheres provides channels for Ag<+> and Cl<-> to enter the channels and gradually grow into a cube;and after a reaction is completed, the Ag / AgCl-PDA-CoFe2O4 cubic nano antibacterial agent is obtained. In a synthetic process of the antibacterial agent, addition of external chlorine sources or surfactants is not needed, and external energy such as high temperature or high pressure is not needed. The prepared Ag / AgCl-PDA-CoFe2O4 cubic nano antibacterial agent has dual antibacterial performance,and has excellent magnetic performance. The cubic nano antibacterial agent has good application prospects in the aspects of biomedicine, water treatment and the like.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to an Ag / AgCl-PDA-CoFe 2 o 4 A preparation method of a magnetic nanocube antibacterial agent. Background technique [0002] As a traditional antibacterial material, silver was widely used for antibacterial and antiseptic in ancient times. Nano-silver particles have superior characteristics unmatched by other antibacterial agents. The preparation method of commonly used nano-silver particles is mostly pure silver nanoparticles. Pure nano-silver particles are expensive as catalysts and antibacterial agents, and it is difficult to separate them from the system. Unseparated silver particles will cause pollution after discharge. environmental pollution. [0003] Immobilizing silver nanoparticles on solid supports is considered to be an effective way to improve their stability. Among various auxiliary materials, magnetic materials show clear advantages, they can not only preven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/04C08K7/24C08K3/08C08K3/16C08K9/12C08G73/06A01N59/16A01N25/08A01N25/10A01P1/00
Inventor 张春古义男金成召马维刚滕桂香靳晓东王丽萍
Owner 甘肃兰博研创科技有限公司