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Preparation method and applications of zinc oxide-graphene oxide composite nanomaterial

A graphene composite and nanomaterial technology, which is applied in the preparation and application of nanomaterials, and the preparation and application of nanocomposite materials, can solve the problems of unsatisfactory antibacterial effect, other cell damage, weakened antibacterial ability, etc., and achieves inhibition of the growth of Escherichia coli , high antibacterial activity, simple and feasible operation method

Inactive Publication Date: 2014-04-23
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problem of nano-ZnO antibacterial materials is that: the effective antibacterial concentration will also cause damage or even death of other cells; ZnO nanomaterials with large specific surface area are easy to agglomerate, weakening their antibacterial ability
The latest research shows that GO can also inhibit the growth of bacteria to a certain extent by destroying the cell membrane of Escherichia coli, but its antibacterial effect is not ideal yet.

Method used

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  • Preparation method and applications of zinc oxide-graphene oxide composite nanomaterial
  • Preparation method and applications of zinc oxide-graphene oxide composite nanomaterial
  • Preparation method and applications of zinc oxide-graphene oxide composite nanomaterial

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Effect test

Embodiment 1

[0031] In the present embodiment, the steps of the preparation method of zinc oxide-graphene oxide composite nanomaterial are as follows:

[0032] Use absolute ethanol as a solvent to form a reaction solution mixed system: that is, weigh 0.0025mol of Zn(Ac) 2 2H 2 O was dispersed in 50 mL of absolute ethanol to form a zinc source, and the reaction was vigorously stirred at 80°C for 20 minutes. At the same time, GO was prepared by Hummer’s oxidation method, weighing 0.2g LiOH·2H 2 O and 60mgGO were respectively dispersed in 20mL and 30mL of absolute ethanol, and the two were mixed under vigorous stirring, and the mixed solution was added dropwise to the zinc acetate mixed solution, and the stirring reaction was continued for 30 minutes. The OH that is gradually ionized by the LiOH lye in the reaction solution mixed system - with Zn 2+ The Zn-OH complex is formed, and then fully contacted with the oxygen-containing groups of GO to bind to the surface of GO. The reaction solu...

Embodiment 2

[0035] This embodiment is basically the same as Embodiment 1, especially in that:

[0036] In the present embodiment, the steps of the preparation method of zinc oxide-graphene oxide composite nanomaterial are as follows:

[0037] Weigh 0.0025mol of Zn(Ac) 2 2H 2 O was dispersed in 50 mL of absolute ethanol, and the reaction was vigorously stirred at 80°C for 20 minutes. At the same time, GO was prepared by Hummer’s oxidation method, weighing 0.2g LiOH·2H 2 O and 60mgGO were dispersed in 20mL and 30mL of absolute ethanol respectively, and the two were mixed under vigorous stirring, and the mixture was added dropwise into the zinc acetate mixed solution, and the reaction was continued for 1h. After the reaction was completed, after cooling to room temperature, n-hexane equivalent to twice the volume of the mixture was added, and placed in a refrigerator at 4° C. to settle overnight. After discarding the supernatant, the substrate was thoroughly washed three times with absol...

Embodiment 3

[0040] This embodiment is basically the same as the previous embodiment, and the special features are:

[0041] In this embodiment, weigh 0.0025mol of Zn(Ac) 2 2H 2 O was dispersed in 50 mL of absolute ethanol, and the reaction was vigorously stirred at 80°C for 20 minutes. At the same time, GO was prepared by Hummer’s oxidation method, weighing 0.2g LiOH·2H 2 O and 60mgGO were respectively dispersed in 20mL and 30mL of absolute ethanol, and the two were mixed under vigorous stirring, and the mixture was added dropwise into the zinc acetate mixed solution, and the reaction was continued for 5h. After the reaction was completed, after cooling to room temperature, n-hexane equivalent to twice the volume of the mixture was added, and placed in a refrigerator at 4° C. to settle overnight. After discarding the supernatant, the substrate was thoroughly washed three times with absolute ethanol and deionized water, and dried in a vacuum oven at 60 °C. For structural and performanc...

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Abstract

The invention discloses a preparation method of a zinc oxide-graphene oxide composite nanomaterial, which is implemented through the following steps: by taking soluble divalent zinc ions as a zinc source, taking the soluble divalent zinc ions, graphene oxide and alkali liquor as reactants together, according to a situation that the mass ratio of the zinc ions to the graphene oxide is (1-3): 1, forming a solute composition; by taking alcohol as a solvent, forming a reaction solution mixed system; and after a reaction is performed for 30 min-5 h, purifying a substrate by using centrifugation and washing methods, so that the zinc oxide-graphene oxide composite nanomaterial is obtained. The zinc oxide-graphene oxide composite nanomaterial prepared according to the invention has an effective antibacterial ability at low concentration, and has no obvious toxic action on cells. According to the invention, the operation process is simple, the reaction process has no obvious pollution to the environment, the production cost is low, and the prepared nanomaterial can be applied to the antisepsis of medical apparatuses and instruments, and has a potential in commercial large-scale production.

Description

technical field [0001] The invention relates to the preparation and application of a nanometer material, in particular to the preparation and application of a nanocomposite material with graphene oxide as a carrier, which is applied in the technical fields of nanometer inorganic materials, antibacterial applications and cytotoxicology. Background technique [0002] With the increasingly serious environmental pollution in the 21st century, pathogenic microorganisms have become one of the important factors threatening human health. However, some traditional fungicides have problems such as high toxicity and bacterial resistance, so the research on the development of new green antibacterial materials is imminent. [0003] ZnO itself has good antibacterial properties, and has antibacterial effects on both Gram-negative and positive bacteria. When the size of ZnO is reduced to nanoscale, its antibacterial activity tends to increase. With the development of the preparation and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01P1/00B82Y30/00B82Y40/00
Inventor 王海芳王艳雯马辛姜雨武迪曹傲能
Owner SHANGHAI UNIV
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