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Collosol gel production method of nano NiO material

A technology of sol-gel method and manufacturing method, which is applied in the direction of chemical instruments and methods, colloid chemistry, colloid chemistry, etc., and can solve the problems of poor dispersion of nanoparticles, limited application, high price, etc.

Inactive Publication Date: 2004-05-05
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation method of nano-NiO material needs to use more expensive raw materials, such as Ni metal organic alkoxide, and adopts sol-gel method to prepare nano-NiO material, but this raw material is difficult to prepare and expensive
Now generally use Ni inorganic salts, such as nickel sulfate, nickel oxide, nickel nitrate, etc., and use alkaline solution as a precipitant. This method is easy to introduce impurity ions such as SO 4 2- , Cl - , NO 3 - , must be washed many times to remove these ions, and its application in cutting-edge products requiring higher purity is limited
Therefore, the method has many process steps and the dispersion of nanoparticles is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Commercially available commercially available nickel acetate tetrahydrate is heated in a constant temperature vacuum oven at a temperature of 90° C. to dehydrate it, and then it is dissolved in absolute ethanol to prepare a 0.5 mol / L solution, which is airtight Set aside for later use.

[0023] Dissolve polyethylene glycol 6000 in a certain amount of deionized water, the amount of deionized water is Ni:H 2 O=1:2 molar ratio shall prevail, and a small amount of ammonia water shall be added to adjust the pH value at 7.5-8.

[0024] Slowly add the prepared ethanol solution of nickel acetate into the aqueous solution of polyethylene glycol, and stir at a high speed to keep the solution uniform, heat a small amount of ammonia water intermittently, and adjust the pH value to 7.5-8.

[0025] The mixture was kept in a constant temperature water bath at 70° C. for 2-4 hours with constant stirring.

[0026] After the reaction is over, take out the solution from emera...

Embodiment 2

[0027] Example 2: Commercially available nickel acetate tetrahydrate was heated in a constant temperature vacuum drying oven at a temperature of 90°C to dehydrate it, then dissolved in absolute ethanol to prepare a 0.5 mol / L solution, and placed in an airtight place for future use .

[0028] Dissolve polyethylene glycol 6000 in a certain amount of deionized water, the amount of deionized water is Ni:H 2 O=1:2 molar ratio shall prevail, and a small amount of ammonia water shall be added to adjust the pH value at 7.5-8.

[0029] Slowly add the prepared ethanol solution of nickel acetate into the aqueous solution of polyethylene glycol, and stir at a high speed to keep the solution uniform, heat a small amount of ammonia water intermittently, and adjust the pH value to 7.5-8.

[0030] Then the mixture was kept in a constant temperature water bath at 70° C. for 2-4 hours, and kept stirring.

[0031] After the reaction was completed, the solution was taken out when it changed fro...

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PUM

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Abstract

A process for preparing NiO nanoparticles in the form of tetragonal crystal by sol-gel method includes dissolving polyethanediol in deionized water, adding less ammonia water to regulate pH=7.5-8, dissolving nickel acetate in absolute alcohol, slowly adding the solution to said aqueous solution of polyethanediol, high-speed stirring, holding temp at 70 deg.c for 4 hr while stirring to obtain sol, filtering, drying and calcining at 500 deg.C for 2 hr.

Description

technical field [0001] The invention relates to a sol-gel manufacturing method of nanometer NiO material. More specifically, the invention relates to a manufacturing process for preparing a nano-tetragonal NiO powder or a nano-NiO semiconductor film by a sol-gel method, which belongs to the technical field of chemistry and chemical engineering. Background technique [0002] NiO nanopowder is an important functional material, which is widely used in ceramics, thermosensitive elements, catalysts, magnetic materials, (Ni-MH, Ni-Cd) batteries, etc. In recent years, it has been used in electrochromic materials, gas sensors , The application of supercapacitors has attracted the attention of researchers. At present, the preparation method of nano-NiO material needs to use more expensive raw materials, such as Ni metal organic alkoxide, and adopts sol-gel method to prepare nano-NiO material, but this raw material is difficult to prepare and expensive. Now generally use Ni inorgani...

Claims

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Application Information

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IPC IPC(8): B01J13/00C01G53/04
Inventor 程知萱潘庆谊李琰
Owner SHANGHAI UNIV
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