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Preparation method of nano-nickel dioxide

A technology of nickel dioxide and nanometer, which is applied in the field of preparation of nanocatalytic materials, can solve the problems of poor thermal stability, particle diameter not in the nanometer range, increase the post-processing process, etc., and achieve the effect of reducing liquid discharge and fine nanostructure

Inactive Publication Date: 2005-03-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is that a large amount of strong oxidizing agent sodium hypochlorite is inevitably used in the reaction. This process increases the post-treatment process due to the removal of available chlorine and the generation of by-product chloride ions at the end, and improper treatment will pollute the environment.
In addition, the nickel dioxide prepared by this method also has the disadvantage of poor thermal stability, and its particle diameter is not in the nanometer range.

Method used

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  • Preparation method of nano-nickel dioxide
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  • Preparation method of nano-nickel dioxide

Examples

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Effect test

Embodiment 1

[0013] Weigh 4g of sodium carbonate and 9g of sodium hydroxide and dissolve in 120mL of water to form a mixed alkali solution, and dissolve 14g of nickel nitrate hexahydrate in 60mL of water. While stirring, slowly drop nickel nitrate into the mixed alkali. After dropping, continue stirring at 50°C for 20h. The precipitate was then washed until the filtrate was neutral. It is then dried at 90°C, calcined at 350°C, and ground to obtain black nickel dioxide with a particle diameter of 10-40nm.

Embodiment 2

[0015] Weigh 8g of sodium carbonate and 7g of sodium hydroxide and dissolve in 120mL of water to form a mixed alkali solution, and dissolve 18g of nickel nitrate hexahydrate in 60mL of water. While stirring, slowly drop nickel nitrate into the mixed alkali. After dropping, continue stirring at 70°C for 15h. The precipitate was then washed until the filtrate was neutral. It is then dried at 120°C, calcined at 500°C, and ground to obtain black nickel dioxide with a particle diameter of 20-40nm.

Embodiment 3

[0017] Weigh 6g of sodium carbonate and 8g of sodium hydroxide and dissolve in 120mL of water to form a mixed alkali solution, and take 19g of nickel nitrate hexahydrate and dissolve in 60mL of water. While stirring, slowly drop nickel nitrate into the mixed alkali. After dropping, continue stirring at 80°C for 10h. The precipitate was then washed until the filtrate was neutral. It is then dried at 100°C, calcined at 450°C, and ground to obtain black nickel dioxide with a particle diameter of 10-40nm.

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Abstract

The invention discloses a process for preparing nickel oxide which comprises, dissolving 13-26 wt% of sodium carbonate and 16-29 wt% of sodium hydroxide into 120mL water so as to obtain mixed queous alkali, dissolving 45-70 wt% of nickel nitrate into 60 ml water, dropping nickel nitrate into the mixed queous alkali of sodium carbonate and sodium hydroxide when stirring, stiring 10-20h at 30-120 deg. C, scouring to neutral, drying at 80- 120 deg. C, and sintering at 300-500 deg. C.

Description

technical field [0001] The invention relates to a preparation method of nanometer catalytic material, in particular to a preparation method of nanometer nickel dioxide. Background technique [0002] The traditional preparation method of nickel dioxide is to add nickel sulfate dropwise in the mixed solvent that sodium hydroxide and sodium hypochlorite form at present, remove available chlorine and other by-products by filtration after the stirring reaction, and then obtain through decompression drying (Nakagawa, K. ; Konaka, R.; Nakata, T. J. Org. Chem. 1962, 27, 1597-1601). Its disadvantage is that a large amount of strong oxidizing agent sodium hypochlorite is inevitably used in the reaction. This process increases the post-treatment process due to the removal of available chlorine and the generation of by-product chloride ions at the end, and improper treatment will pollute the environment. In addition, the nickel dioxide prepared by this method also has the disadvantage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/04
Inventor 纪红兵王婷婷张美英佘远斌
Owner SOUTH CHINA UNIV OF TECH
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