Method for preparing Co3O4 nano material by Co2O3 powder

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...

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

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