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Nanocomposite material preparation method based on graphene oxide autocatalysis

A nanocomposite material, graphene technology, applied in the field of functional material chemistry, nanomaterials, can solve the problems of slow progress in nanocomposite materials research, and achieve the effects of environmental friendliness, good electrical conductivity, and high specific surface area

Active Publication Date: 2012-07-11
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Graphene nanocomposites are an important field of graphene applications, although research on graphene nanocomposites has been slow

Method used

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  • Nanocomposite material preparation method based on graphene oxide autocatalysis
  • Nanocomposite material preparation method based on graphene oxide autocatalysis
  • Nanocomposite material preparation method based on graphene oxide autocatalysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) preparation of graphene oxide:

[0030] Add 230mL of concentrated sulfuric acid with a mass fraction of 98% to a dry beaker, cool to 0°C with an ice-water bath, add natural flake graphite (10g), NaNO 3 (5g) and KMnO 4 (30g). Control the temperature of the reaction solution at 10-15°C, stir and react for a certain period of time; then place the beaker in a constant temperature water bath at about 35°C, and continue stirring for 30 minutes when the reaction temperature rises to about 35°C; finally add deionized water while stirring, Control the temperature of the reaction solution within 100°C, and continue stirring for 30 minutes. Dilute the reaction solution to 1000mL with deionized water, then add an appropriate amount of 5% H 2 o 2 , filtered while hot, fully washed with 5% HCl and deionized water until there was no SO in the filtrate 4 2- . (with BaCl 2 Solution detection), promptly obtains the purified graphene oxide.

[0031] 2) Synthesis of graphene ox...

Embodiment 2

[0037] (a) Take 100mL graphene oxide solution (0.5mg / mL) in a clean glass bottle;

[0038] (b) Draw 10mL of 0.1M chloroauric acid solution with a dropper, add dropwise to the above graphene oxide solution under magnetic stirring, mix well, and place at room temperature for 72 hours;

[0039] (c) ultrafiltration or dialysis to remove excess unreacted ions and nanoparticles in the solution to prepare graphene nanocomposites;

[0040] (d) Performance characterization by AFM, SEM and other means.

Embodiment 3

[0042] (a) Take 100mL graphene oxide solution (0.6mg / mL) in a clean glass bottle;

[0043] (b) Draw 50mL of 0.05M silver nitrate solution with a dropper, add dropwise to the above-mentioned graphene oxide solution under the action of magnetic stirring, mix well, and place at room temperature for 72 hours;

[0044] (c) ultrafiltration or dialysis to remove excess unreacted ions and nanoparticles in the solution to prepare graphene nanocomposites;

[0045] (d) Performance characterization by AFM, SEM and other means.

[0046] The graphene nanocomposite material that above-mentioned embodiment obtains, as Figure 1-4 as shown, figure 1 , figure 2 The scanning electron micrograph of the graphene oxide nanocomposite material prepared for the embodiment of the present invention; image 3 , Figure 4 It is the atomic force electron microscope image of the graphene oxide nanocomposite material of the embodiment of the present invention.

[0047] In the invention, the carboxyl g...

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PUM

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Abstract

The invention discloses a nanocomposite material preparation method based on graphene oxide autocatalysis. The method comprises the following steps: 1, slowly adding a metal salt solution to a graphene oxide solution, and utilizing carboxyl groups and hydroxyl groups on the graphene oxide as nucleation sites of nanoparticle crystals; and 2, carrying out crystal growth on the nucleation sites on graphene oxide sheets through an autocatalysis process to form graphene sheets which are respectively attached with a layer of metal nanoparticles, and ultrafiltering or dialyzing to prepare the graphene nanocomposite material. The method which has the characteristics of simple and easily controlled technology, environmental protection, low cost, convenience for popularization and the like provides a feasible way for the industrialized production of the graphene composite material. The prepared graphene nanocomposite material which has the advantages of high specific surface area and good conductivity has important application values in electronic devices, energy storage, drug loading, biological detection and the like.

Description

technical field [0001] The invention relates to a preparation method of a nanocomposite material based on graphene oxide self-catalysis. The graphene nanocomposite material is prepared in one step using graphene oxide and a metal salt as raw materials, and belongs to the technical field of nanomaterials and functional material chemistry. Background technique [0002] Graphene is by far the thinnest material in the world - a single-atom-thick material. Not only has excellent electrical properties, light weight, good thermal conductivity, large specific surface area, Young's modulus and fracture strength comparable to carbon nanotubes, but also has some unique properties, such as quantum Hall effect, quantum tunneling wear effect etc. Due to the above unique nanostructure and excellent performance, graphene can be applied to many advanced materials and devices, such as thin film materials, energy storage materials, liquid crystal materials, mechanical resonators, etc. Graphen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y40/00C01B32/184
Inventor 王贤松崔大祥黄鹏
Owner SHANGHAI JIAO TONG UNIV
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