Graphene supported micron-gold core-shell structure and preparation method thereof

A gold core-shell, graphene technology, applied in the graphene-supported micron gold core-shell structure and the field of preparation thereof

Active Publication Date: 2017-01-25
HUAZHONG UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

[0003] In view of the defects of the prior art, the purpose of the present invention is to provide a method for preparing a graphene-supported micron gold core-she

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  • Graphene supported micron-gold core-shell structure and preparation method thereof
  • Graphene supported micron-gold core-shell structure and preparation method thereof
  • Graphene supported micron-gold core-shell structure and preparation method thereof

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[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0029] The graphene-supported micron gold core-shell structure provided by the present invention includes: an outer gold shell layer and a graphene multilayer with the inner wall of the shell layer as a supporting material. A new chemical immersion method is used to remove the PS in the gold shell layer, and a graphene multilayer with controllable thickness is grown under the catalysis of the gold nanolayer. In the present invention, by improving the soap-free emulsion polymerization method, PS that is controllable in the range of 4 microns to 10 microns is grown. In the present invention, a...

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Abstract

The invention discloses a graphene supported micron-gold core-shell structure and a preparation method thereof. The preparation method comprises the following steps: (1) obtaining polystyrene microsphere emulsion and adding a modified solution into the polystyrene microsphere emulsion; stirring to obtain surface modified polystyrene microsphere emulsion; (2) obtaining a gel solution of microsphere gold seeds; (3) obtaining a gel solution of polystyrene microspheres with gold shell layers on surfaces; and (4) drying the gel solution of the polystyrene microspheres with the gold shell layers on the surfaces to obtain a powdered sample, and immersing the sample in a tetrahydrofuran solution to form a plurality of layers of graphene on inner walls of the gold shell layers and remove the polystyrene microspheres, and drying to obtain the graphene supported micron-gold core-shell structure. According to the graphene supported micron-gold core-shell structure, the grain diameter of the polystyrene microspheres prepared by an improved mono-dispersion method can be controlled to be 4 microns to 10 microns, and the thickness of the graphene multilayered supported gold shell layers can be controlled to be dozens or hundreds nanometers.

Description

Technical field [0001] The invention belongs to the field of nanocomposite materials, and more specifically, relates to a graphene-supported micron gold core-shell structure and a preparation method thereof. Background technique [0002] As a new type of material, nanocomposite materials currently have good performance in mechanics, electricity and energy absorption. They have the characteristics of absorbing and converting electromagnetic waves, and can be widely used in pulsed power supplies and electromagnetic wave shields. The preparation of polystyrene microspheres (PS spheres) is mostly nano-scale, and most of the preparation methods of graphene are vapor deposition growth. Summary of the invention [0003] In view of the defects of the prior art, the purpose of the present invention is to provide a method for preparing a graphene-supported micron gold core-shell structure, which aims to solve the problem of the preparation of the hollow metal core-shell structure and the gr...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00
Inventor 易林董烁顾建国包晨婷刘飒飒
Owner HUAZHONG UNIV OF SCI & TECH
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