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Preparation of Ag/CNTs/GO compound with sandwich structure

A sandwich structure and sandwich technology, which is applied in the field of Ag/CNTs/GO composites with sandwich structure and their preparation, can solve the problems of limiting wide application, reducing bacteriostatic properties, easy oxidation, etc., achieving simple process and improving dispersibility. , easy to operate effect

Inactive Publication Date: 2016-05-25
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, silver nanoparticles are easy to agglomerate, easy to oxidize under light and reduce antibacterial properties, this instability greatly limits its wide application in the medical field

Method used

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  • Preparation of Ag/CNTs/GO compound with sandwich structure
  • Preparation of Ag/CNTs/GO compound with sandwich structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Prepare 100ml of dopamine hydrochloride (DPA) solution with a concentration of 1mg / ml, add 0.1g of carbon nanotubes (CNTs), and stir magnetically at room temperature for 15 hours for the first time;

[0028] (2) Centrifuge the stirred product, wash it with distilled water, add it to 250ml of graphene oxide (GO) aqueous solution with a concentration of 2mg / ml, and magnetically stir for the second time at room temperature for 1h;

[0029] (3) Add 80ml of 1mM silver nitrate solution and 80ml of 1mM sodium borohydride solution in turn to the solution obtained in (2), and stir at room temperature for 20 hours for the third time;

[0030] (4) The stirred product was centrifuged, washed with water and alcohol for 3 times, and dried in vacuum at room temperature for 24 hours to obtain a silver nanoparticle / carbon nanotube / graphene oxide nanocomposite (Ag / CNTs / GO) with a sandwich structure .

Embodiment 2

[0032] (1) Prepare 100ml of dopamine hydrochloride (DPA) solution with a concentration of 2mg / ml, add 0.3g of carbon nanotubes (CNTs), and stir magnetically at room temperature for 16 hours for the first time;

[0033] (2) Centrifuge the stirred product, wash it with distilled water, add it to 250ml of graphene oxide (GO) aqueous solution with a concentration of 4mg / ml, and magnetically stir for the second time at room temperature for 1.5h;

[0034] (3) Add 80ml of 2mM silver nitrate solution and 80ml of 2mM sodium borohydride solution in turn to the solution obtained in (2), and stir at room temperature for 22 hours for the third time;

[0035] (4) The stirred product was centrifuged, washed with water and alcohol for 3 times, and dried in vacuum at room temperature for 24 hours to obtain a silver nanoparticle / carbon nanotube / graphene oxide nanocomposite (Ag / CNTs / GO) with a sandwich structure .

Embodiment 3

[0037] (1) Prepare 100ml of dopamine hydrochloride (DPA) solution with a concentration of 3mg / ml, add 0.5g of carbon nanotubes (CNTs), and stir magnetically at room temperature for 17h for the first time;

[0038] (2) Centrifuge the stirred product, wash it with distilled water, add it to 250ml of graphene oxide (GO) aqueous solution with a concentration of 6mg / ml, and magnetically stir for the second time at room temperature for 2h;

[0039] (3) Add 80ml of 3mM silver nitrate solution and 80ml of 3mM sodium borohydride solution in turn to the solution obtained in (2), and stir at room temperature for the third time for 24 hours;

[0040] (4) The stirred product was centrifuged, washed with water and alcohol for 3 times, and dried in vacuum at room temperature for 24 hours to obtain a silver nanoparticle / carbon nanotube / graphene oxide nanocomposite (Ag / CNTs / GO) with a sandwich structure .

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Abstract

The invention discloses an Ag / CNTs / GO compound with a sandwich structure and a preparation method thereof. In the sandwich structure, the upper layer and the lower layer are graphene oxide thin layers, and the middle is a carbon nanotube layer with a hollow structure, wherein nano-silver particles are uniformly dispersed in graphene oxide and carbon nanotubes. The method provided by the invention has the advantages of simplicity and practicability, convenient operation, easy control, simplicity and environmental protection. Also, the prepared Ag / CNTs / GO compound with a sandwich structure strengthens the collaborative immobilization capacity of graphene and carbon nanotubes to nano-silver, so that the compound can have very good stability, and the dispersibility of nano-silver particles are improved. At the same time, the compound also shows a strong inhibitory effect on Gram positive bacteria (staphylococcus aureus) and Gram negative bacteria (Escherichia coli) and other strains.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to an Ag / CNTs / GO composite with a sandwich sandwich structure and a preparation method thereof. Background technique [0002] Silver and its compounds have been widely used in daily life as a class of antibacterial materials, and nanoscale silver particles are favored as a kind of silver nano antibacterial materials. However, silver nanoparticles are easy to agglomerate and oxidize under light to reduce their antibacterial properties, which greatly limits their wide application in the medical field. In order to increase the stability of silver nanoparticles, people have designed various carriers (such as macromolecules, zeolites and carbon materials) to load silver nanomaterials, and directly load nano silver particles on the carrier materials to obtain composites. The method is simple and easy. , and the antibacterial effect was enhanced. Therefore, increa...

Claims

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Application Information

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IPC IPC(8): A61K33/38A61K47/04A61K47/18A61P31/04
CPCY02A50/30
Inventor 李建华王双双张德彬闫邦锋张其清
Owner FUZHOU UNIVERSITY
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