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Low-temperature preparation method of ceria nano-crystalline microsphere of graduation structure

A technology of nanocrystalline microspheres and cerium oxide, which is applied in the direction of microsphere preparation, chemical instruments and methods, and microcapsule preparations, and can solve problems such as unfavorable industrial production and application, complicated surface of surfactants, and large investment in equipment. To achieve the effect of simple and easy control of the process, less energy consumption and high product purity

Inactive Publication Date: 2009-11-25
XUANCHENG JINGRUI NEW MATERIAL CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The literature [Chemistry of Materials, 2007, 19 (7), 1648-1655] reports the preparation method of three-dimensional flower-like cerium oxide, wherein the disadvantage is that the use of surfactants makes the surface complex and increases the cost, and the material needs to undergo 450 It can only be obtained after calcination at high temperature, which consumes a lot of energy
However, the above two methods are complex in process, many in operation steps, large in equipment investment, and high in energy consumption, which is not conducive to industrial production and application. Therefore, it is of great significance to develop a low-cost method for preparing ceria nanopowders with a three-dimensional structure.

Method used

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  • Low-temperature preparation method of ceria nano-crystalline microsphere of graduation structure

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Effect test

Embodiment 1

[0024] Add cerium nitrate to 10 ml of benzyl alcohol, form a colorless and clear solution after magnetic stirring at room temperature, the concentration of cerium nitrate is 0.05 mol / liter, then put the colorless and clear solution in a flask, and heat it in an oil bath at 100°C Stirring and reacting for 36 hours, a khaki precipitate was formed, and the obtained precipitate was washed with ethanol, separated, and dried at 50°C to obtain a high-purity hierarchical structure ceria nanocrystalline microsphere powder.

Embodiment 2

[0026] Add cerium nitrate to 10 ml of benzyl alcohol, and form a colorless and clear solution after magnetic stirring at room temperature. The concentration of cerium nitrate is 0.05 mol / liter. After heating and stirring for 48 hours, a khaki precipitate was formed, and the obtained precipitate was washed with ethanol, separated, and dried at 50°C to obtain a high-purity hierarchical structure ceria nanocrystalline microsphere powder.

Embodiment 3

[0028] Add cerium nitrate to 10 ml of benzyl alcohol, and form a colorless and clear solution after magnetic stirring at room temperature. The concentration of cerium nitrate is 0.1 mol / liter. After heating and stirring for 60 hours, a khaki precipitate was formed, and the obtained precipitate was washed with ethanol, separated, and dried at 50°C to obtain a high-purity hierarchical structure ceria nanocrystalline microsphere powder.

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Abstract

The invention discloses a low-temperature preparation method of ceria nano-crystalline microsphere of graduation structure. The non-aqueous system low-temperature preparation method is used and cerium chloride, ammonium ceric nitrate, cerium nitrate or cerium sulfate is used as the precursor and benzyl alcohol is used as solvent and surfactant and the raw materials react for a certain time in oil-bath heating condition to obtain the ceria nano-crystalline microsphere powder of graduation structure. The prepared ceria has three-dimensional graduation spheroidal structure. The ceria nano-crystalline microsphere powder of graduation structure can quickly and effectively absorb the inorganic and organic pollutant in waste water at room temperature with very high absorption capacity. The low-temperature preparation method has features of simple technology, low cost, friendly environment, high yield, accordance with the practical production requirement.

Description

technical field [0001] The invention relates to a low-temperature preparation method of ceria adsorption material, in particular to a non-aqueous system low-temperature preparation method of hierarchical structure ceria nanocrystalline microsphere powder adsorption material. Background technique [0002] my country is rich in rare earth resources, and its industrial reserves rank first in the world. Among them, cerium oxide, as a rare earth compound, accounts for about 50% of the proven reserves of rare earths. It has important uses in automobile exhaust purification treatment, solid fuel cells, metal anti-oxidation, anti-corrosion coatings and additives, catalytic cracking of fluids and chemical mechanical polishing abrasives. [0003] Due to the surface effect of nanomaterials, nanomaterials have high surface activity, high surface energy and high specific surface area, so nanomaterials show great potential in the preparation of high-performance adsorption materials. In ...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/06B01J13/02C01F17/00
Inventor 张礼知肖海燕
Owner XUANCHENG JINGRUI NEW MATERIAL CO LTD
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