A kind of preparation method of nano cerium oxide particle

A technology of nano-cerium oxide and particles, which is applied in the field of preparation of nano-cerium oxide particles, can solve the problems of poor application performance, poor dispersion, and easy agglomeration of nano-CeO, and achieves controllable particle size, simple preparation process, The effect of uniform shape

Active Publication Date: 2021-06-15
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] For the defect of prior art, the object of the present invention is to provide a kind of preparation method of nano cerium oxide particles, for solving the problem of nano CeO in the prior art. 2 Agglomeration is easy to occur during preparation, and the dispersion is not good, which leads to the problem of poor application performance

Method used

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  • A kind of preparation method of nano cerium oxide particle
  • A kind of preparation method of nano cerium oxide particle
  • A kind of preparation method of nano cerium oxide particle

Examples

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Comparison scheme
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Embodiment 1

[0027] Weigh 1.085g Ce(NO 3 ) 3 ﹒ 6H 2 O was dissolved in 1ml of deionized water; then 1.44g of citric acid was weighed and dissolved in 1.5ml of deionized water. After mixing the two solutions, without adjusting the pH value, stirred at 30°C for 1h to form a sol; Hexane, start stirring, control the temperature of the reaction system at 60±2°C, add 0.87g of cetyltrimethylammonium bromide, 1.0ml of n-butanol and 1.5ml of the sol prepared by the surface active wrapping agent to form a stable sol-inverse microemulsion system, keep the temperature of the water bath constant, and continue to stir for 3 hours to form gel particles; cool the gel particles to 0~-30°C to freeze, suction filter at low temperature, and use- Repeated washing with absolute ethanol at 20°C; then vacuum freeze-drying at -60°C for 24 hours to obtain the precursor; calcining the precursor at 500°C for 3 hours to obtain nano-cerium oxide. The measured SEM image is as follows figure 1 shown. The measured p...

Embodiment 2

[0029] Weigh 1.085g Ce(NO 3 ) 3 ﹒ 6H 2 O was dissolved in 1ml of deionized water; then 1.41g of tartaric acid was weighed and dissolved in 1.5ml of deionized water, and the two solutions were mixed without adjusting the pH value, and stirred at 30°C for 1 hour to form a sol; 50ml of cyclohexyl alkane, start stirring, control the temperature of the reaction system at 60±2°C, add 0.87g of cetyltrimethylammonium bromide, 1.0ml of n-butanol and 1.5ml of the prepared sol to the reactor in sequence, the sol is made of surfactant Wrap to form a stable sol-inverse microemulsion system, keep the temperature of the water bath constant, continue to stir for 3 hours, and form gel particles; cool the gel particles to 0~-30°C to freeze, filter at low temperature, and use -20 Repeated washing with absolute ethanol at ℃; then vacuum freeze-drying at -60°C for 24 hours to obtain the precursor; calcining the precursor at 500°C for 3 hours to obtain nano-cerium oxide. The measured particle s...

Embodiment 3

[0031] Weigh 1.085g Ce(NO 3 ) 3 ﹒ 6H 2 O was dissolved in 1ml of deionized water; then 1.44g of citric acid was weighed and dissolved in 1.5ml of deionized water, after mixing the two solutions, the pH was adjusted to 5 with 25% ammonia water, and stirred at 30°C for 1h to form a sol; Add 50ml of cyclohexane into the reactor, start stirring, control the temperature of the reaction system at 60±2°C, add 0.87g of cetyltrimethylammonium bromide, 1.0ml of n-butanol and 1.5ml of the prepared sol to the reactor in sequence, The sol is wrapped by a surfactant to form a stable sol-inverse microemulsion system. Keep the temperature of the water bath constant and continue to stir for 3 hours to form gel particles; cool the gel particles to 0~-30°C to freeze, and pump them at low temperature. Filter and wash repeatedly with -20°C absolute ethanol; then vacuum freeze-dry at -60°C for 24 hours to obtain the precursor; calcinate the precursor at 500°C for 3 hours to obtain nano-cerium ox...

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Abstract

The invention relates to a preparation method of nano cerium oxide particles, which belongs to the field of nano powder materials. The method comprises the following steps: (1) configuring an aqueous solution of cerium nitrate-complexing agent, adjusting the pH, and stirring to form a sol; (2) mixing The sol is dispersed in the mixture of surfactant, co-surfactant and cyclohexane as the water phase to form a stable inverse microemulsion, and the gel particles are obtained through reaction; (3) the gel particles are cooled and frozen, filtered , drying, and calcining to obtain nanometer cerium oxide particles. The nano cerium oxide prepared by the invention has small and controllable particle size, uniform appearance, low agglomeration and high surface activity. The problem of hard agglomeration of colloidal particles during drying and heat treatment in the traditional sol-gel method is solved, and the preparation process of the invention is simple, the solvent can be reused, and industrial production is easy to realize.

Description

technical field [0001] The invention belongs to the field of nano powder materials, in particular to a preparation method of nano cerium oxide particles. [0002] technical background [0003] At present, the research on nano-metal oxide particles in various countries in the world mainly includes preparation, microstructure, macroscopic properties and application. Among them, the preparation technology of nanoparticles is the key, because the preparation process and process control have great influence on the microstructure and properties of nanoparticles. Macro performance has a significant impact. The preparation methods of nanometer metal oxide particles mainly include chemical methods and physical methods. Among them, the chemical method is divided into impregnation method, co-precipitation method, homogeneous deposition method, sol-gel method and microemulsion method. The sol-gel method and reverse microemulsion method have mild reaction conditions, are easy to control...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/10C01F17/235B82Y30/00
CPCB82Y30/00C01P2004/03C01P2004/64C01F17/206
Inventor 肖林久郭宏宇岳姝利刘艺郭建
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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