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Monodisperse cerium oxide nanoparticle and preparation method thereof

A nanoparticle and cerium oxide technology, applied in chemical instruments and methods, nanotechnology, inorganic chemistry, etc., can solve the problems of wide product particle size distribution, complex preparation process, powder shape and particle size distribution, etc. problems, to achieve the effect of narrow size distribution, good product dispersion and easy operation

Active Publication Date: 2012-07-11
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The preparation process of the above invention is relatively complicated, or requires two hydrothermal reactions, or requires subsequent calcination treatment, or requires the use of precipitants and organic solvents, and the prepared product has a wide particle size distribution, which has great influence on the powder morphology and particle size distribution. There are still difficulties in effectively controlling

Method used

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  • Monodisperse cerium oxide nanoparticle and preparation method thereof
  • Monodisperse cerium oxide nanoparticle and preparation method thereof
  • Monodisperse cerium oxide nanoparticle and preparation method thereof

Examples

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Effect test

Embodiment 1

[0019] Weigh 2.74g of ceric ammonium nitrate, 1.0g of sodium nitrate and 0.1g of PEG 2000, dissolve in 15ml of water, and mix thoroughly by magnetic stirring to obtain a clear solution. Transfer the solution to a reaction kettle, put it in an oven, and conduct a hydrothermal reaction at 200°C for 10 hours. After washing with water, ethanol and centrifugation, the precipitate is dried in an oven at 80°C to obtain monodisperse cerium oxide with a particle size of 240±2nm.

Embodiment 2

[0021] Weigh 4.11g of ceric ammonium nitrate, 1.5g of sodium nitrate and 0.01g of PEO, dissolve in 15ml of water, and mix thoroughly by magnetic stirring to obtain a clear and transparent solution. Transfer the solution to a reaction kettle, put it in an oven, and conduct a hydrothermal reaction at 220° C. for 1 hour. After washing with water, ethanol and centrifugation, the precipitate is dried in an oven at 80°C to obtain monodisperse cerium oxide with a particle size of 270±3nm.

Embodiment 3

[0023] Weigh 2.74g of ceric ammonium nitrate, 2.0g of lithium nitrate and 0.1g of PVP, dissolve in 15ml of water, and mix thoroughly by magnetic stirring to obtain a clear solution. The solution was transferred to a reaction kettle, put into an oven, and reacted hydrothermally at 120° C. for 100 hours. After washing with water, ethanol and centrifugation, the precipitate is dried in an oven at 80°C to obtain monodisperse cerium oxide with a particle size of 180±3nm.

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Abstract

The invention provides a monodisperse cerium oxide nanoparticle and a preparation method thereof. Monodisperse cerium oxide nano-powder with high crystallinity can be prepared by controlling the reaction speed in a way of taking a soluble cerium salt, nitrate and a dispersant as reaction raw materials, taking water as a solvent and taking nitrate as a mineralizing agent and by controlling the concentration of a cerium salt solution, the proportions of reaction raw materials, hydrothermal time and hydrothermal temperature under a hydrothermal condition, and effective regulation and control over the particle diameter of cerium oxide is realized. The cerium oxide nano-powder prepared with the method has the advantages of uniform size distribution, high dispersity, simple preparation process, no need of complex raw material equipment, easiness for operating, low cost and high repeatability.

Description

technical field [0001] The invention belongs to the field of rare earth oxide materials, and relates to monodisperse cerium oxide nanoparticles and a preparation method thereof. Background technique [0002] Cerium is an important lanthanide element with good redox properties. Cerium oxide is the most active catalyst in the rare earth oxide series. It has a unique crystal structure, high oxygen storage capacity and oxygen release capacity, and strong oxidation-reduction performance (Ce 3+ / C 4+ ), which has attracted great attention and has been widely used in industrial catalysis, precision polishing and other fields. The adsorption of nano-cerium oxide on the active carrier material can greatly improve the redox performance of the material. In high-precision polishing, the particle size, shape and uniformity of size distribution of the powder have an important influence. The finer the particles and the more uniform the distribution, the better the polishing effect. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y40/00
Inventor 王丹胡柱东毛丹
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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