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Method for preparing beta-type lead dioxide nanometer particles

A nanoparticle and lead dioxide technology, applied in the field of nanomaterials, can solve the problem that the particle size and morphology of lead dioxide nanopowders cannot be controlled, are not suitable for large-scale industrial applications, and lead dioxide nanoparticles are rare, etc. problems, to achieve high conversion efficiency and catalytic activity, wide industrial use, controllable particle size and morphology

Inactive Publication Date: 2010-05-26
无锡润鹏复合新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But the research about lead dioxide nanoparticle is rare at present, only disclosed a kind of synthetic method of lead dioxide nanocrystal in Chinese patent ZL02100264.9, this method mainly is to add lead salt or lead oxide into water earlier, Then add sodium hydroxide to it, adjust the pH value of the solution between 9 and 14, and then react with oxidants such as chlorine gas in liquid phase to obtain β-type lead dioxide nanocrystals at a temperature of 60 to 200 ° C.
However, the process of the above method is relatively complicated, and the particle size and shape of the lead dioxide nanopowder cannot be controlled, so it is not suitable for large-scale industrial application

Method used

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  • Method for preparing beta-type lead dioxide nanometer particles
  • Method for preparing beta-type lead dioxide nanometer particles
  • Method for preparing beta-type lead dioxide nanometer particles

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Dissolve 0.4979g of lead nitrate in 50ml of 1M sodium hydroxide solution, add 0.3g of sodium dodecylbenzenesulfonate and 0.5406g of sodium persulfate successively under stirring, and react in a water bath at 80°C in a closed reaction kettle for 6 hours, after cooling to room temperature, centrifuge the above reaction product at a speed of 1500r / min for 10 minutes, separate the obtained solid, rinse it with a large amount of ethanol aqueous solution for 3 times, and dry it in vacuum at 50°C for 2 hours, and the obtained powder is lead dioxide nanoparticles.

[0019] The product of this embodiment is scanned by electron microscope to observe its microscopic appearance, and the obtained SEM pictures are as follows: figure 1 shown.

Embodiment 2

[0021] Dissolve 0.4979g of lead nitrate in 50ml of 1M sodium hydroxide solution, add 0.15g of polyethylene glycol and 0.5406g of potassium persulfate successively under stirring, react in a water bath at 130°C for 18 hours in a closed reactor, and cool to room temperature Finally, the above reaction product was centrifuged at 1500r / min for 10 minutes to separate the obtained solid, rinsed three times with a large amount of ethanol aqueous solution, and dried in vacuum at 50°C for 2 hours, and the obtained powder was lead dioxide nanoparticles.

[0022] The product of this embodiment is scanned by electron microscope to observe its microscopic appearance, and the obtained SEM pictures are as follows: figure 2 shown.

Embodiment 3

[0024] Dissolve 0.2650g of lead nitrate in 40ml of 1M sodium hydroxide solution, add 0.02g of polyvinylpyrrolidone and 0.3651g of ammonium persulfate successively under stirring, react in a water bath at 180°C for 24 hours in a closed reactor, and cool to room temperature Finally, the above reaction product was centrifuged at 1500r / min for 10 minutes to separate the obtained solid, rinsed three times with a large amount of ethanol aqueous solution, and dried in vacuum at 50°C for 2 hours, and the obtained powder was lead dioxide nanoparticles.

[0025] The product of this embodiment is scanned by electron microscope to observe its microscopic appearance, and the obtained SEM pictures are as follows: image 3 shown.

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Abstract

The invention discloses beta-type lead dioxide nanometer particles and a preparation method thereof. In the method, by a hydrothermal method, lead nitrate serving as a raw material is added with proper amount of oxidant and additive at a lower temperature to prepare a large amount of beta-type lead dioxide nanometer particles. The method has the advantages that: the cost is low; the production process is greatly simplified; and the lead dioxide nanometer particles, prepared by the method, have a controllable particle size and shape, a big specific surface area, high conversion efficiency and catalytic activity and wide application prospect in fields of electrochemistry and catalysis. Therefore the method is suitable for mass industrialized production.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to a β-type lead dioxide nanoparticle and a preparation method thereof. Background technique [0002] Lead dioxide is a widely used strong oxidant and an important electrode material, especially in acidic media, it exhibits excellent chemical stability, and is one of the basic components of lead-acid battery plates. Treatment has a wide range of applications, and the tetragonal β-type lead dioxide is more excellent in conductivity and corrosion resistance than the orthorhombic α-type lead dioxide. Due to the small size and large specific surface area of ​​lead dioxide nanoparticles, the surface atoms are incompletely coordinated and the bonding and electronic states on the surface are different from those inside the particles, so there are more active sites on the surface, which can show the characteristics of lead dioxide bulk materials. It has the characteristics that it does not hav...

Claims

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Application Information

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IPC IPC(8): C01G21/08B82B3/00B82B1/00
Inventor 李长生王芳菲唐华李国伟曹可生
Owner 无锡润鹏复合新材料有限公司
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