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Preparation method of graphene foam and precious metal nano-particle composite material

A technology of graphene foam and nano particles, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve problems such as unfavorable industrial practical applications, and achieve the goal of improving its comprehensive performance, simple method, and high specific surface area Effect

Inactive Publication Date: 2013-12-11
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current preparation methods of graphene-noble metal nanoparticles usually require chemical reducing agents such as sodium borohydride and polyols, etc., and the composite materials are obtained as powder or paper packaging, which is not conducive to industrial practical applications

Method used

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  • Preparation method of graphene foam and precious metal nano-particle composite material
  • Preparation method of graphene foam and precious metal nano-particle composite material
  • Preparation method of graphene foam and precious metal nano-particle composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Dissolve 50mg of graphene oxide and 100mg of chloroauric acid in 100ml of deionized water, and mix them uniformly by ultrasonic;

[0018] Immersing the obtained product in liquid nitrogen to freeze, followed by freeze-drying the obtained solid;

[0019] The product obtained after the drying was completed was heated to 250° C. in air for 10 hours to obtain a graphene foam-gold nanoparticle composite material.

[0020] The product was characterized by transmission electron microscopy, and the results were as follows: figure 1 shown. The product was characterized by scanning electron microscopy, and the results were as follows: figure 2 It can be seen that the composite material is a porous structure.

Embodiment 2

[0022] Dissolve 10 mg of graphene oxide and 30 mg of silver nitrate in 20 ml of deionized water, and mix evenly by stirring;

[0023] The obtained product is subjected to refrigerating compressor freezing and drying;

[0024] The obtained product was heated to 500° C. for 10 minutes in hydrogen to obtain a graphene foam-silver nanoparticle composite material.

[0025] The product was characterized by transmission electron microscopy, and the results were as follows: image 3 shown.

Embodiment 3

[0027] Dissolve 100mg of graphene oxide and 100mg of sodium chloroplatinate in 100ml of deionized water, and mix them uniformly by ultrasonic;

[0028] The obtained product is subjected to refrigerating compressor freezing and drying;

[0029] The obtained product was heated to 1100° C. for 5 seconds in argon to obtain a graphene foam-platinum nanoparticle foam composite material.

[0030] The obtained result is similar to Example 1.

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Abstract

The invention discloses a preparation method of a graphene foam and precious metal nano-particle composite material. The method includes the following steps: step I, dissolving oxidized graphene and precious metal salt in water and mixing uniformly; step II, freeze-drying products; and step III, carrying out heat treatment on the products in the step II in certain atmosphere or under a vacuum condition so as to obtain the graphene foam and precious metal nano-particle composite material, wherein the heat treatment temperature is 150-1100 DEG C, and the heat treatment time is within 5 seconds and 10 hours.

Description

technical field [0001] The invention relates to the field of nanomaterial manufacturing, in particular to a method for preparing a graphene foam-noble metal nanoparticle composite material. Background technique [0002] Noble metals are important catalyst components, so they have broad application prospects in industry. The price of precious metals is relatively high. In order to reduce production costs and improve the catalytic efficiency of precious metals, precious metals are often prepared as nanomaterials loaded on oxide ceramic supports. However, the weight of the oxide ceramic carrier material is relatively heavy, which is not conducive to the needs of energy saving and emission reduction. Meanwhile, precious metals supported on oxide ceramics are not easily recycled. [0003] Graphene is a carbon material with a two-dimensional honeycomb structure formed by a single layer of carbon atoms, and has excellent mechanical and electrical properties. At the same time, gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/52B01J23/50B01J23/42B01J35/10B01J37/32B82Y30/00B82Y40/00
Inventor 尹奎波季静孙立涛
Owner SOUTHEAST UNIV
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