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Preparation and application of MnO2-Ag nanocomposite

A technology of nanocomposite materials and mixed solutions, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of application limitations, single function of nanomaterials, etc., and achieve good biocompatibility, The effect of simple preparation method and mild reaction conditions

Active Publication Date: 2017-02-22
QUANZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Nanomaterials have always been a research hotspot in various fields. Traditional nanomaterials have a single function, which limits their application in various fields. Nanocomposite materials can overcome this shortcoming.

Method used

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  • Preparation and application of MnO2-Ag nanocomposite
  • Preparation and application of MnO2-Ag nanocomposite
  • Preparation and application of MnO2-Ag nanocomposite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) First mix 5mL, 5mg / mL bovine serum albumin solution with 1mL, 1mM manganese acetate solution at room temperature, and stir and react for 30min at a rotating speed of 300rpm;

[0038] (2) Add 5mL, 70mM sodium hydroxide solution, adjust the pH of the solution to 9-10, and react for 5min;

[0039] (3) Then add 10mL, 10mM silver nitrate solution and react at room temperature for 12h;

[0040] (4) Centrifuge the reacted mixed solution for 30min at a rotating speed of 10000rpm, remove unreacted bovine serum albumin, centrifuge to obtain a black precipitate, and centrifuge twice;

[0041] (5) Take the black precipitate after centrifugation, add water to dissolve it, freeze it in an ultra-low temperature refrigerator for 12 hours, and then freeze it in a freeze dryer to obtain MnO 2 -Ag nanocomposites.

Embodiment 2

[0043] (1) First mix 5mL, 5mg / mL bovine serum albumin solution with 1mL, 5mM manganese acetate solution at room temperature, and stir and react for 30min at a rotating speed of 300rpm;

[0044] (2) Add 5mL, 70mM sodium hydroxide solution, adjust the pH of the solution to 9-10, and react for 5min;

[0045] (3) Then add 10mL, 10mM silver nitrate solution and react at room temperature for 12h;

[0046](4) Centrifuge the reacted mixed solution for 30 min at a speed of 10,000 rpm to remove unreacted bovine serum albumin, centrifuge to obtain a black precipitate, and centrifuge twice;

[0047] (5) Take the black precipitate after centrifugation, add water to dissolve it, freeze it in an ultra-low temperature refrigerator for 12 hours, and then freeze it in a freeze dryer to obtain MnO 2 -Ag nanocomposites.

Embodiment 3

[0049] (1) First mix 5 mL, 5 mg / mL bovine serum albumin solution with 1 mL, 10 mM manganese acetate solution at room temperature, and stir and react for 30 min at a rotating speed of 300 rpm;

[0050] (2) Add 5mL, 70mM sodium hydroxide solution, adjust the pH of the solution to 9-10, and react for 5min;

[0051] (3) Then add 10mL, 10mM silver nitrate solution and react at room temperature for 12h;

[0052] (4) Centrifuge the reacted mixed solution for 30 min at a speed of 10,000 rpm to remove unreacted bovine serum albumin, centrifuge to obtain a black precipitate, and centrifuge twice;

[0053] (5) Take the black precipitate after centrifugation, add water to dissolve it, freeze it in an ultra-low temperature refrigerator for 12 hours, and then freeze it in a freeze dryer to obtain MnO 2 -Ag nanocomposites.

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Abstract

The invention discloses a preparation method of a MnO2-Ag nanocomposite. The preparation method is a novel green synthetic method. Through combination of the advantages of manganese dioxide and nao-silver, the MnO2-Ag nanocomposite is prepared in a self-assembly manner and applied to biological antibacterium. The preparation method is simple, mild in reaction condition and low in cost; MnO2 in the synthesized MnO2-Ag nanocomposite is of a flaky structure, and Ag nano particles are uniform in particle size, good in dispersity and high in stability; and the MnO2-Ag nanocomposite prepared through the method has the strong sterilization and antibacterial action on staphylococcus aureus, escherichia coli, pseudomonas aeruginosa and other bacteria and can be applied to the aspects of the medicine, the biology and the like.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a kind of MnO 2 -Ag nanocomposite preparation method and its application. Background technique [0002] Harmful bacteria have always been one of the main factors affecting human health and life from ancient times to the present, and countless people die from bacterial infections all over the world every year. Antibiotics have long played an important role in the treatment of various microbial infections and diseases, and have made great contributions to people's lives and health. However, due to the widespread use and abuse of antibiotics, the resistance of microorganisms to antibiotics has become stronger and stronger, making the inhibitory effect of many antibiotics on microorganisms significantly weakened, or even completely ineffective. Therefore, it is imminent to develop new antibacterial materials. [0003] With the increasing development of nanotechnol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00B82Y30/00
CPCB22F9/24B82Y30/00B82Y40/00
Inventor 杨大鹏魏锦刘明焕
Owner QUANZHOU NORMAL UNIV
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