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Preparation method of cobalt oxide/graphene composite nano material

A compound technology of cobalt tetraoxide and graphene, which is applied in the field of materials, can solve the problems of difficult solid-liquid separation, many synthesis steps, and long time, and achieve the effect of simple synthesis equipment, simple process flow, and easy preparation

Inactive Publication Date: 2013-06-12
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In summary, using graphene oxide as raw material, graphene-based inorganic nanocomposites were synthesized by solution in-situ synthesis technology, whether it is water / solvothermal method, liquid phase controlled precipitation method, whether it is water / solvent heat treatment, microwave Assisted, ultrasonically assisted, almost all involve steps such as washing, filtering, drying and calcination. There are many problems such as many synthesis steps, long time, difficult solid-liquid separation, and difficulty in obtaining powder.

Method used

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  • Preparation method of cobalt oxide/graphene composite nano material
  • Preparation method of cobalt oxide/graphene composite nano material
  • Preparation method of cobalt oxide/graphene composite nano material

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Weigh 30 mg of glycine, add 8 ml of cobalt nitrate solution with a concentration of 0.06 mol / L, mix evenly by ultrasonic, add 100 ml of 0.5 mg / ml graphene oxide suspension dropwise, mix evenly by ultrasonic, put the mixture into In the ultrasonic atomization device with circulating cooling, set the nitrogen flow rate to 0.8 L / min, and turn on the atomization device with a piezoelectric ceramic plate frequency of 2.4 MHz. The solid product generated by the combustion reaction was collected by depositing a single crystal silicon wafer placed at the outlet end of the tube furnace.

Embodiment 2

[0035] Weigh 60 mg of glycine, add 15 ml of cobalt nitrate solution with a concentration of 0.06 mol / L, mix evenly by ultrasonic, add 100 ml of 0.5 mg / ml graphene oxide suspension dropwise, mix evenly by ultrasonic, put the mixture into In the ultrasonic atomization device with circulating cooling, set the nitrogen flow rate to 0.8 L / min, and turn on the atomization device with a piezoelectric ceramic plate frequency of 2.4 MHz. The solid product generated by the combustion reaction was collected by depositing a single crystal silicon wafer placed at the outlet end of the tube furnace.

Embodiment 3

[0037] Weigh 115 mg of ethylene glycol, add 25 ml of cobalt nitrate solution with a concentration of 0.06 mol / L, mix evenly by ultrasonic, add 100 ml of 0.5 mg / ml graphene oxide suspension dropwise, mix evenly by ultrasonic, and put the mixed solution into Into the ultrasonic atomization device with circulating cooling, set the nitrogen flow rate to 0.8 L / min, turn on the atomization device with a piezoelectric ceramic sheet frequency of 2.4 MHz, and the generated droplets are loaded into the furnace tube at 800 °C by nitrogen gas, causing The solid product generated by the combustion reaction of the solution is deposited on a single crystal silicon wafer placed at the outlet end of the tube furnace to collect samples.

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Abstract

The invention relates to a preparation method of a cobalt oxide / graphene composite nano material, which is characterized by comprising the following steps: (1) preparing a 0.01-1.00 mol / L cobalt nitrate-organic fuel mixed solution, wherein the mol ratio of organic fuel to metal ions is 0.9-2; (2) preparing a 0.1-1.0 mg / ml graphene oxide dispersion solution; (3) calculating the volumes of the mixed solution obtained in the step (1) and the graphene oxide dispersion solution obtained in the step (2) according to the mass ratio of cobalt oxide to graphene in the designed product and the required preparation amounts, and mixing the mixed solution and the graphene oxide dispersion solution by ultrasonic to obtain a dispersion solution for atomization; (4) filling the dispersion solution obtained in the step (3) into an ultrasonic atomization device, carrying the generated atomized liquid drops into a 500-1100 DEG C pipe furnace by argon or nitrogen gas at the flow rate of 0.3-1.2 L / minute, and initiating solution combustion reaction; and (5) collecting the solid reaction product. The invention has the advantages of shorter technical procedure, simple synthesis equipment and continuous preparation process, can directly obtain the final powder product by one step, and can easily implement industrialized preparation.

Description

technical field [0001] The invention belongs to the technical field of materials and relates to a preparation method of composite nanomaterials. Background technique [0002] Cobalt tetroxide (Co 3 o 4 ) is an important transition metal oxide with a normal spinel structure, which has unique optical, electrical, magnetic, electrochemical, catalytic and other properties. It is widely used in many new fields such as pressure sensitive gas sensor, catalyst, super capacitor, flat panel display, magnetic material and lithium ion battery cathode material. co 3 o 4 The application effects in these aspects are not only affected by the chemical properties of the material itself, but also its microstructure (such as grain size, particle size distribution range and crystal morphology) is a key parameter that affects and determines its performance. Therefore, in recent years, high-quality nano-Co 3 o 4 The controlled synthesis technology of powder has been extensively studied bec...

Claims

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Application Information

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IPC IPC(8): C01G51/04C01B31/04B82Y30/00C01B32/184
Inventor 陈伟凡刘越林玉翠刘铭吴骏飞
Owner NANCHANG UNIV
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