Method for preparing graphene oxide/ silver antibacterial composite material through intermediate pneumatic plasma jet

A plasma and composite material technology, applied in the field of graphene oxide composite materials, can solve problems such as affecting biological safety, affecting bacteriostatic properties, and complicated steps, and achieve the effects of reducing the loss of precious metals, efficient preparation, and low vacuum requirements.

Active Publication Date: 2014-02-12
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The above-mentioned prior art methods are all chemical methods carried out in solution, the steps are cumbersome, and some chemical reducing agents and surface stabilizers that affect biological safety are introduced, which are pollutants to the samples to be prepared and affect the quality of the samples. Bacteriostatic properties

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  • Method for preparing graphene oxide/ silver antibacterial composite material through intermediate pneumatic plasma jet
  • Method for preparing graphene oxide/ silver antibacterial composite material through intermediate pneumatic plasma jet
  • Method for preparing graphene oxide/ silver antibacterial composite material through intermediate pneumatic plasma jet

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, without any limitation to the present invention.

[0025] 1. Preparation of graphene oxide suspension: dissolving graphite oxide powder in deionized water, ultrasonic treatment for 8 hours to obtain brown graphene oxide suspension;

[0026] 2. Immersion silver precursor: Add 3 mmol / L silver nitrate solution to the obtained graphene oxide suspension while stirring, then place the resulting solution in a vacuum drying oven and dry at 80°C for 24 hours to obtain graphene oxide and silver precursor flake mixture;

[0027] 3. Plasma reduction: put the flake mixture of graphene oxide and silver precursor into the jet plasma generator, turn on the vacuum pump to pump the air pressure in the device below 5 Pa; Pa, turn on the AC high-voltage power supply, adjust the peak voltage to 5000V, obtain a stable medium-pressure hydrogen-cooled plasma je...

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Abstract

The invention discloses a method for preparing a graphene oxide / silver antibacterial composite material through intermediate atmosphere plasma jet. The method comprises the following steps of: dipping a silver precursor; loading silver ions on the surface of graphene oxide; treating through intermediate pneumatic hydrogen-cooling plasma jet under room temperature; and reducing the silver ions into silver nanoparticles to obtain the graphene oxide / silver composite material. According to the method, the precursor is reduced through plasma, so that a chemical agent bringing pollution to environment is avoided using; the reduction is performed in a dry state that the loss of precious metal is greatly reduced, and the graphene oxide / silver antibacterial composite material can be prepared efficiently. A sample transmission electron microscope image also shows that the silver nano ions are uniformly distributed on the surface of graphene oxide.

Description

technical field [0001] The invention relates to a graphene oxide composite material, in particular to a preparation method of a graphene oxide / silver antibacterial composite material. Background technique [0002] In recent years, graphene and graphene oxide have received a lot of research and attention due to their huge specific surface area and chemical stability. One of the important applications is to load metal nanoparticles on the surface of graphene and graphene oxide to prepare graphene / metal nano Composite materials of particles and graphene oxide / metal nanoparticles can be used in sensors, catalysts and other fields. [0003] Silver metal has been considered as an effective antibacterial material for centuries, and current research has also proved that silver nanoparticles (AgNPs) can effectively inhibit a variety of bacteria, fungi and viruses, so AgNPs are used in medical devices , wound treatment, and water purification treatment are also research hotspots toda...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01P1/00
Inventor 方世东孟月东沈洁程诚魏钰李绪奇左潇陈龙威
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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