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Nano gold/graphene oxide composite material and preparation method thereof

A composite material and graphene technology, applied in metal material coating process, liquid chemical plating, coating and other directions, can solve problems such as poor electrical conductivity, and achieve the effects of stable state, simple experimental conditions and simple operation methods.

Inactive Publication Date: 2011-10-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

GO has good water solubility and is easy to form a film. It can be mass-produced in ordinary laboratories and is widely used in the field of biosensing. Its disadvantage is that its conductivity is poorer than that of graphene.

Method used

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  • Nano gold/graphene oxide composite material and preparation method thereof
  • Nano gold/graphene oxide composite material and preparation method thereof
  • Nano gold/graphene oxide composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A preparation method of nano gold / graphene oxide, comprising the following steps:

[0016] 1) Weigh 1mg GO, dissolve it in 1mL double distilled water, and prepare 1mg / mL GO solution,

[0017] 2) Weigh 1g HAuCl 4 , dissolved in a 100mL volumetric flask, and prepared with 1% HAuCl 4 solution,

[0018] 3) In a round bottom flask containing 20 mL of distilled water, add 0.2 mL of 1 mg / mL GO solution, stir for 10 minutes, then quickly add 0.1 mL of 1% HAuCl 4 Solution, continue to stir vigorously for 10 minutes, add 0.035mg NaBH 4 . Finally, it was stirred for 20 minutes to obtain a composite material with gold nanoparticles modified on GO.

[0019] In this example, GO and HAuCl 4 The mass ratio is 1:5. The product perspective electron microscope picture is as follows figure 1 shown. The shape of gold nanoparticles on GO is a regular spherical shape with a diameter of about 5nm, the state is stable, and the particle size distribution is uniform.

[0020] figure 2...

Embodiment 2

[0024] A preparation method of nano gold / graphene oxide, comprising the following steps:

[0025] 1) Weigh 1mg GO, dissolve it in 1mL double distilled water, and prepare 1mg / mL GO solution,

[0026] 2) Weigh 1g HAuCl 4 , dissolved in a 100mL volumetric flask, and prepared with 1% HAuCl 4 solution,

[0027] 3) In a round bottom flask containing 20 mL of distilled water, add 0.2 mL of 1 mg / mL GO solution, stir for 10 minutes, then quickly add 0.2 mL of 1% HAuCl 4 Solution, continue to stir vigorously for 10 minutes, 0.07mg NaBH 4 . Finally, it was stirred for 20 minutes to obtain a composite material with gold nanoparticles modified on GO.

[0028] In this example, the GO and HAuCl used 4 The mass ratio is 1:10. The product perspective electron microscope picture is as follows figure 2 shown. The shape of gold nanoparticles on GO is a regular spherical shape with a diameter of about 5nm, the state is stable, and the particle size distribution is uniform.

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Abstract

The invention relates to a nano gold / graphene oxide composite material and a preparation method thereof, which are used for enhancing the conductivity of a material. The preparation method of the nano gold / graphene oxide composite material is as follows: based on graphene oxide dispersed in a water phase as a carrier, nano gold particles with even particle distribution are generated through in situ direct reduction of chloroauric acid on the surface of the carrier so as to obtain the nano gold / graphene oxide composite material; and preferably, sodium borohydride is added in a dispersion obtained by fully mixing the graphene oxide with HAuCl4 under the severe stirring condition so that HAuCl4 is reduced, so as to obtain the nano gold / graphene oxide composite material. According to the invention, experiment conditions are simple, an operation method is simple and easy, and a protective agent is not added in the experiment process; the vast majority of prepared nano gold particles are modified on the surface of graphene oxide (GO), the shape is regular, the state is stable, particle size is evenly distributed, and the conductivity and biocompatibility of GO can be enhanced by modifying the nano gold on the surface of GO.

Description

technical field [0001] The invention relates to a nano gold / graphene oxide composite material and a preparation method thereof. Background technique [0002] Graphene, also known as single-layer graphite, is a single-layer carbon atom surface material exfoliated from graphite materials, and its thickness is only 0.335 nanometers. It is a perfect two-dimensional crystal of single-layer carbon atoms, composed of a layer of hexagonal honeycomb carbon atoms, carbon atoms can be sp 2 The covalent bonds are tightly connected to form a two-dimensional sheet structure. Graphene has a hexagonal plane network structure, three sp in the hexagonal plane 2 The hybrid orbitals are arranged at a 120° angle to each other and form covalent bonds with adjacent carbon atoms. Each carbon atom is connected to another three carbon atoms, and six carbon atoms form a regular hexagonal ring on the same plane, stretching to form a sheet structure. Graphene has attracted much attention due to its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24C23C18/44
Inventor 丁收年朱伟高步红孙岳明
Owner SOUTHEAST UNIV
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