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Multi-level structure alpha type nickel hydroxide prepared by microwave auxiliary and method thereof

A microwave-assisted nickel hydroxide technology, which is applied in the direction of nickel oxide/nickel hydroxide, nanostructure manufacturing, and manipulation of single atoms, can solve the problems of long reaction time and achieve fast reaction time, simple preparation process, and short preparation process Effect

Inactive Publication Date: 2010-01-06
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, the preparation of α-type nickel hydroxide nanomaterials mostly involves the introduction of surfactants or other organic solvents into the reaction system, and the reaction time is relatively long.

Method used

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  • Multi-level structure alpha type nickel hydroxide prepared by microwave auxiliary and method thereof
  • Multi-level structure alpha type nickel hydroxide prepared by microwave auxiliary and method thereof
  • Multi-level structure alpha type nickel hydroxide prepared by microwave auxiliary and method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: α-type nickel hydroxide nano petals

[0028] 0.581 g of nickel nitrate and 0.119 g of urea were dissolved in a mixed solution of 10 ml of ultrapure water and 10 ml of ethanol, and magnetically stirred to obtain a uniformly dispersed solution. The solution was transferred to a 30 ml quartz reaction vial and sealed. Put the reaction vial into a microwave reaction device, and react rapidly at 120°C for 1 minute. The reaction flask was quickly cooled to room temperature under the blowing of compressed air, and the product was separated by centrifugation. The obtained product was washed repeatedly with ultrapure water and absolute ethanol, and dried in air at 80°C. figure 2 It is clearly seen from the scanning electron microscope photo that the obtained nano petals are flakes, and a large number of petals are stacked together irregularly.

Embodiment 2

[0029] Embodiment 2: α-type nickel hydroxide nanoflowers

[0030] 0.581 g of nickel nitrate and 0.119 g of urea were dissolved in a mixed solution of 10 ml of ultrapure water and 10 ml of ethanol, and magnetically stirred to obtain a uniformly dispersed solution. The solution was transferred to a 30 ml quartz reaction vial and sealed. Put the reaction bottle into a microwave reaction device, and react rapidly at 100°C (or 180°C) for 30 minutes. The reaction flask was quickly cooled to room temperature under the blowing of compressed air, and the product was separated by centrifugation. The obtained product was washed repeatedly with ultrapure water and absolute ethanol, and dried in air at 80°C. image 3 a and 3b are scanning electron micrographs of samples obtained at 100 and 180 °C, respectively, and the generation of nanoflower-like morphology can be seen. Each flower is composed of more than a dozen nano-petals connected to each other, and the thickness of the nano-petal...

Embodiment 3

[0031] Embodiment 3: α-type nickel hydroxide nanoflowers

[0032] 0.474g of nickel chloride and 0.119g of urea were dissolved in a mixed solution of 10 ml of ultrapure water and 10 ml of ethanol, and magnetically stirred to obtain a uniformly dispersed solution. The solution was transferred to a 30 ml quartz reaction vial and sealed. Put the reaction bottle into a microwave reaction device, and react rapidly at 120°C for 30 minutes. The reaction flask was quickly cooled to room temperature under the blowing of compressed air, and the product was separated by centrifugation. The obtained product was washed repeatedly with ultrapure water and absolute ethanol, and dried in air at 80°C. Figure 4 From the corresponding scanning electron micrographs, it can be seen that its appearance is still flower-like, but the thickness of the nano-petals that make up the flower is relatively thin.

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Abstract

The invention relates to multi-level structure alpha type nickel hydroxide prepared by microwave auxiliary and a method thereof. Soluble nickel salt as a raw material, urea as precipitator and mixed solution of ultrapure water and ethanol as solvent are stirred and mixed at room temperature to form uniform solution; and the solution is transferred to a microwave reaction quartz flask, and a microwave device is set to react in a temperature range of between 100 and 180 DEG C. After the reaction is finished, products are separated, washed and dried to obtain alpha type nickel hydroxide nanopowder. The shape of the product can be controlled through changing the microwave reaction temperature, time, and type of the nickel salt raw material, volume ratio of the ultrapure water and the ethanol, and other preparation conditions. The method has the characteristics of low cost of the raw material, simple process, convenient operation, quick and high efficient reaction, controllable shape and the like.

Description

technical field [0001] The present invention relates to a kind of preparation method of nickel hydroxide, relate to the method for preparing α-type nickel hydroxide by microwave heating in the mixing system of water and ethanol under the condition of urea as precipitating agent more precisely by soluble nickel salt, It belongs to the field of nanometer material preparation. Background technique [0002] In recent years, due to the rapid development of the global information industry, secondary batteries have played an important role in our lives. Nickel-based secondary batteries widely used at present, such as nickel / cadmium (Ni / Cd), nickel / iron (Ni / Fe), nickel / zinc (Ni / Zn), nickel / metal hydride (Ni / MH), etc. Nickel hydroxide is used as the active material, so the research on nickel hydroxide materials with high activity, high capacity and excellent comprehensive performance has important practical significance. [0003] In recent years, nickel hydroxide nanomaterials have...

Claims

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Application Information

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IPC IPC(8): C01G53/04B82B1/00
Inventor 李红芳曹荣
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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