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Method for preparing Co3O4 nano material by Co2O3 powder

A technology for the preparation of nanomaterials and powders, applied in the fields of nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problems of complex reaction routes, large environmental pollution, and high preparation costs, and achieve reduced process costs, less environmental pollutants, and raw materials. low cost effect

Inactive Publication Date: 2011-06-22
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Co obtained by the above method 3 o 4 The main disadvantages of nanomaterials are: 1) the cost of raw materials is high
The sintering process usually requires a high temperature above 200°C; 4) The preparation cost is high
The production cost of the product prepared by the route of complex reaction route, high reaction temperature and complex equipment; 5) environmental pollution is large
Since the reaction uses cobalt salts and appropriate reactants as raw materials, many by-products will be produced in the process of producing oxides, which will pollute the environment

Method used

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  • Method for preparing Co3O4 nano material by Co2O3 powder
  • Method for preparing Co3O4 nano material by Co2O3 powder
  • Method for preparing Co3O4 nano material by Co2O3 powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 0.5mmol of Co 2 o 3 , 1g of glucose and 16ml of deionized water are mixed evenly and put into the reaction kettle, placed in a thermostat and heated at a constant temperature of 120°C for 6h, cooled, separated, and dried to prepare Co 3 o 4 Nanoparticles, analyzed by scanning electron microscopy, show that what is obtained is a non-uniform spherical aggregate composed of particles with a particle size of about 20 nanometers.

Embodiment 2

[0031] 1mmol of Co 2 o 3 , 8ml of absolute ethanol and 8ml of deionized water are mixed evenly and put into the reaction kettle, placed in a thermostat and heated at a constant temperature of 160°C for 6h, after cooling, separation and drying, Co 3 o 4 Nanoparticles, XRD spectrum see Figure 1 , the figure shows that the peak position of the XRD spectrum of the obtained sample is consistent with that of Co in the international standard spectrum library. 3 o 4 The materials are exactly the same, and the average diameter of the nanoparticles is 30nm by calculation.

Embodiment 3

[0033] 1mmol of Co 2 o 3 , 1.6ml of absolute ethanol and 14.4ml of deionized water are mixed evenly and put into the reaction kettle, placed in a constant temperature box and heated at a constant temperature of 160°C for 24h, after cooling, separation and drying, Co 3 o 4 nanoparticles. According to the analysis of transmission electron microscope, the product is Co with an average particle size of about 40nm. 3 o 4 Nanoparticles.

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Abstract

The invention discloses a method for preparing a Co3O4 nano material by a Co2O3 powder, comprising the following steps: taking the Co2O3 powder as a precursor, wherein, if deionized water and alcohol are taken as solvents, the volume ratio of the deionized water to the alcohol of absolute alcohol is 9:1 to 0:10; or when the water solution of glucose is taken as the solvent, the mass fraction of the glucose is between 5-30 percent; mixing and stirring 0.1-0.2mol / L Co2O3 powder and deionized water and alcohol or glucose aqueous solution solvent to form a uniform mixed material, wherein the alcohol may be ethanol, ethylene glycol or glycerol; putting the mixed material in a container, then putting the container in a constant temperature cabinet, raising the temperature at a speed of 8.5-11.5 DEG C / min, and heating the mixed material within the temperature range of 120-160 DEG C for 6-24h; taking the container out for cooling to the room temperature; alternately washing a synthetic product by the deionized water and the absolute alcohol, and drying at low temperature to obtain the Co3O4 nano material. The Co3O4 nano material prepared by the method has easily controlled shape and granularity, high purity, good crystallinity and environment-friendly production process.

Description

technical field [0001] The invention relates to a low temperature by Co 2 o 3 Powder Preparation Co 3 o 4 methods for nanomaterials. Background technique [0002] spinel-type Co 3 o 4 And its composite nanomaterial is an important multifunctional material with a wide range of applications: such as various types of catalysts, anode lithium-ion rechargeable batteries, solid sensors, magnetism, optical instruments, etc. Since the size and shape of nanoparticles affect the performance of the material, it is possible to control the preparation of Co with different particle sizes and shapes. 3 o 4 Nanomaterials are a major area of ​​interest for researchers. A variety of synthetic strategies have been initially formed so far, among which hydrothermal-solvothermal method is an important category, and has important development. For example, Chen et al. (Adv. Mater. 2008, 20, 1205-1209) first obtained nanostructured hollow spheres CoOOH (cobalt basic oxide) by hydrothermal m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/04B82B3/00
Inventor 马杰张淑平刘伟
Owner UNIV OF SHANGHAI FOR SCI & TECH
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