Method for preparing nano ferrous acid copper

A copper ferrite, nanotechnology, applied in nanostructure manufacturing, nanotechnology, nanotechnology and other directions, can solve the problems of complex production process, hard agglomeration, and many factors affecting the product by chemical co-precipitation, and achieve a low degree of agglomeration. Effect

Inactive Publication Date: 2008-03-05
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-energy mechanical grinding method consumes a lot of energy, takes a long time to react, and is easy to introduce impurities, and the dispersion is not good enough; the chemical co-precipitation method has many factors that affect the product, making it difficult to control the conditions, and requires high-temperature calcination, which requires high equipment. High energy consumption; the sol-gel method and the self-propagating high-temperature synthesis method are prone to hard agglomeration after drying and high-temperature calcination, and the shrinkage is large during drying; the production process of the microemulsion method is not very mature, and it cannot be applied on a large scale Industrial production, in addition, the cost of raw materials is high, and organic solvents or organic raw materials are often used in the preparation process to pollute the environment, and the obtained precursor needs high temperature treatment
Due to the high production cost, complex production process, harsh reaction conditions, high energy consumption and environmental pollution of the above-mentioned methods, their application in industrial production is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] With ferric nitrate nonahydrate and copper nitrate trihydrate as iron source and copper source, malic acid as complexing agent, take 1.0072g malic acid and dissolve it in 30ml distilled water, after dissolving, add 4.0405g ferric nitrate nonahydrate and 1.2082 nitric acid trihydrate at the same time The molar ratio of copper, iron ions and copper ions is 2:1, and the molar ratio of malic acid and total metal ions is 0.5:1. After it is completely dissolved, stir at room temperature for 1 h, add ammonia water dropwise to adjust the pH value to 4.0, 60 Keep the temperature at ℃ until the gel is formed, then put it in a vacuum drying oven at 70 ℃, dry for 3 hours to get a fluffy and porous dry gel, put the dry gel on a heating plate and directly heat it to about 200 ℃ to make it self-propagating combustion , to obtain nano-copper ferrite powder.

Embodiment 2

[0019] With ferric nitrate nonahydrate and copper nitrate trihydrate as iron source and copper source, malic acid as complexing agent, take 1.6092g of malic acid and dissolve it in 30ml distilled water, after dissolving, add 4.0407g of ferric nitrate nonahydrate and 1.2085g of nitric acid trihydrate at the same time The molar ratio of copper, iron ions and copper ions is 2:1, and the molar ratio of malic acid and total metal ions is 0.8:1. After all of them are dissolved, stir at room temperature for 3 hours, add ammonia water dropwise to adjust the pH value to 6.0, 70°C Keep the temperature at a constant temperature until the gel is formed, then put it into a vacuum drying oven at 80°C, and dry for 5 hours to obtain a fluffy and porous xerogel. Put the xerogel on a heating plate and directly heat it to about 200°C to cause self-propagating combustion. The nano-copper ferrite powder can be obtained.

Embodiment 3

[0021] With ferric nitrate nonahydrate and copper nitrate trihydrate as iron source and copper source, malic acid as complexing agent, take 2.0116g malic acid and dissolve in 30ml distilled water, after dissolving, add 4.0404g ferric nitrate nonahydrate and 1.2083 nitric acid trihydrate at the same time The molar ratio of copper, iron ions and copper ions is 2:1, and the molar ratio of malic acid and total metal ions is 1:1. After it is completely dissolved, stir at room temperature for 4 hours, add ammonia water dropwise to adjust the pH value to 7.0, 50°C Keep the temperature at a constant temperature until the gel is formed, then put it in a vacuum drying oven at 80°C, and dry it for 6 hours to obtain a fluffy and porous xerogel. Put the xerogel on a heating plate and directly heat it to about 200°C to cause self-propagating combustion, that is Nano copper ferrite powder can be obtained.

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Abstract

The present invention relates to preparation process of nanometer copper ferrite, and belongs to the field of superfine copper ferrite powder preparing technology. The preparation process includes the following steps: dissolving malic acid in water, adding ferric nitrate nonahydrate and copper nitrate trihydrate, stirring at room temperature, dropping ammonia water to regulate pH value, evaporating solvent, drying and heating for self-spreading combustion to obtain nanometer copper ferrite powder. The process has facile material, low cost, simple operation, high yield and low power consumption.

Description

technical field [0001] The invention relates to a preparation method of nanometer copper ferrite, which belongs to the technical field of preparation of ultrafine copper ferrite powder. technical background [0002] Nano-copper ferrite is a new multifunctional nanomaterial with spinel structure, which has a wide range of applications. Copper ferrite is widely used in mutual inductance devices, magnetic core bearings, transfer switches and magnetic recording materials due to its magnetic properties. In recent years, it has been found that nano-copper ferrite has good reducibility due to the presence of oxygen vacancies, which can convert CO 2 It is reduced to C, so it has a good application prospect in the control of air pollution, and can be used as a catalyst for CO in the atmosphere 2 , SO 2 , NO 2 The conversion and recycling provide an effective way. Copper ferrite is also an important absorbing agent, which can be used in the development of stealth materials. In a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00B82B3/00
Inventor 王麟生刘甜胡炳元
Owner EAST CHINA NORMAL UNIV
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