Preparation method of cerium oxide nanoparticles

Abstract

The invention relates to a preparation method of cerium oxide nanoparticles and belongs to the field of rare earth oxide materials. The method comprises steps as follows: S1, cerium salt and a surfactant are prepared in the mass ratio being (1:1)-(1:5) and then mixed, the mixture is dissolved in water and stirred, and a clear solution is obtained; S2, the solution is continuously stirred, the pH value of a reaction solution is regulated to 7-10 with an alkaline solution; S3, the uniformly mixed solution is transferred to a reaction kettle for a hydrothermal reaction until the reaction is full;S4, a product obtained after the reaction is dried and ground, and cerium oxide powder is obtained. The preparation method adopts a simple process, and the prepared cerium oxide nanoparticles have controllable particle size and are uniform and stable.

Description

technical field [0001] The invention belongs to the field of rare earth oxide materials, in particular to a method for preparing nano cerium oxide particles with controllable particle size, and belongs to the technical field of inorganic nano material preparation technology. Background technique [0002] Rare earth is a group of new functional materials with electrical, magnetic, optical, and biological properties. It is called the "vitamin" in resources. Basic materials also play an important role in transforming certain traditional industries, such as agriculture, chemical industry, and building materials. my country's rare earth resources are very rich, accounting for more than 80% of the world's proven reserves, and the industrial reserves rank first in the world, providing unique conditions for the development of my country's rare earth industry. [0003] Cerium is the earliest rare earth element used by humans. It is the main component of flint, and humans have used f...

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Problems solved by technology

[0006] Chinese patent CN1699282 has proposed the preparation method of monodisperse spherical cerium oxide, and the obtained cerium oxide spherical particle size is relatively single (about 300nm), and its use is relatively narrow, and needs to use precipitating agent, and the process is more complicated; Chinese patent CN1371867A has proposed a kind of oxidation A preparation method of cerium sol, but this method is not only complicated in process, but also harsh in conditions, and the finally obtained particle size distribution is wide (at 6-200nm), and its application is limited; Chinese patent CN101792171A proposes a cerium oxide nanosphere Preparation method, but this method requires subsequent calcination treatment, and the steps are complicated; Chinese patent CN1025571A proposes a monodisperse nano-cerium oxide nano-powder with good crystallinity, but the particle size of cerium oxide prepared by this method is relatively large (160-300nm) , cannot be used as a nanomaterial and requires the use of nitrate as a mineralizer

In summary, it is challenging to effectively synthesize cerium oxide nanoparticles with controllable particle size, concentrated particle size, and excellent stability through a simple process.

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