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Preparation method of nano cerium oxide with strong ultraviolet shielding performance

A nano-cerium oxide and cerium oxide technology, which is applied in the preparation/treatment of rare earth metal compounds, cerium oxide/cerium hydroxide, nanotechnology, etc., can solve the problems of limited use, achieve performance improvement, strong performance, and reduce particle agglomeration Effect

Pending Publication Date: 2021-02-19
CHANGZHOU GEOQUIN NANO NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nano-cerium oxide has strong ultraviolet absorption performance and good absorption of visible light, but because pure nano-cerium oxide has strong oxidation catalytic activity, it is easy to make Ce 4+ into Ce 3+ , which limits its use to

Method used

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  • Preparation method of nano cerium oxide with strong ultraviolet shielding performance
  • Preparation method of nano cerium oxide with strong ultraviolet shielding performance
  • Preparation method of nano cerium oxide with strong ultraviolet shielding performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) using rare earth cerium chloride as raw material preparation concentration is the cerium chloride solution of 0.6mol / l;

[0032] (2) in the cerium chloride solution, add the calcium chloride solution that the concentration of the cerium oxide quality 6% of metering is 0.2mol / l, mix evenly, then add the sodium lauryl sulfate of the cerium oxide quality 4% of metering, Stir well.

[0033] (3) Sodium carbonate is mixed with the precipitating agent solution that concentration is 2.0mol / l, adopts diaphragm pump to drop in the step (2) rare earth cerium calcium chloride solution with the speed of 140ml / min then, after dropping, control The pH of the precipitate is 10-12, and the hydrogen peroxide with a concentration of 4 mol / l is added dropwise at a speed of 40 ml / min to oxidize the precipitate.

[0034] Wherein, the molar ratio of the measured cerium oxide to the precipitation agent is 1:4, and the molar ratio of the measured cerium oxide to hydrogen peroxide is 1:1. ...

Embodiment 2

[0039] (1) using rare earth cerium chloride as raw material preparation concentration is the cerium chloride solution of 0.6mol / l;

[0040] (2) Adding the concentration of 8% of the mass of cerium oxide to the cerium chloride solution is 0.2mol / l calcium chloride solution, uniformly mixing, then adding sodium lauryl sulfate of 2% of the mass of cerium oxide, stirring uniform.

[0041] (3) Sodium carbonate is mixed with the precipitant solution that concentration is 2.0mol / l, adopts diaphragm pump to drop in the rare earth cerium calcium chloride solution with the speed of 140ml / min then, after dropping, control the pH of precipitate 10-12, then dropwise add hydrogen peroxide with a concentration of 4mol / l at a rate of 40ml / min to oxidize the precipitate.

[0042] Wherein, the molar ratio of the measured cerium oxide to the precipitation agent is 1:4, and the molar ratio of the measured cerium oxide to hydrogen peroxide is 1:1.

[0043] (4) Stir for 1 hour after the addition ...

Embodiment 3

[0047] (1) preparation concentration is the rare earth cerium chloride of 0.8mol / l as raw material;

[0048](2) Add the calcium chloride solution that the quality 8% of metered cerium oxide is 0.3mol / l in the cerium chloride solution, mix evenly, then add the sodium dodecylbenzenesulfonate of the quality 2% of metered cerium oxide , stir well.

[0049] (3) Sodium hydroxide is mixed with the precipitating agent solution that concentration is 1.0mol / l, adopts diaphragm pump to drop in the rare earth cerium chloride solution with the speed of 120ml / min then, after dropping, control the pH of precipitate 10-12, then dropwise add hydrogen peroxide with a concentration of 2mol / l at a rate of 30ml / min to oxidize the precipitate.

[0050] Wherein, the molar ratio of metered cerium oxide to precipitation agent is 1:3.8, and the molar ratio of oxygen metered cerium oxide to hydrogen peroxide is 1:1.

[0051] (4) Stir for 1 hour after the addition of hydrogen peroxide, age for 2 hours,...

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Abstract

The invention belongs to the technical field of preparation of rare earth compounds, and particularly relates to a preparation method of nano cerium oxide with a strong ultraviolet shielding performance. A precipitation method is adopted, Ca<2+> is added into a cerium solution, an alkaline precipitator is used for precipitation, an anionic surfactant is used as an additive, rare earth ions are precipitated, then oxidation, washing with water, alcohol washing, drying and firing are carried out, and finally, airflow crushing is carried out to prepare the nano cerium oxide with an ultraviolet shielding performance. The nano cerium oxide is doped with Ca<2+>, the primary particle size is 10-30 nm the particle size distribution is uniform, the dispersion time in water is as long as 30 days, sedimentation is avoided, and the solid content is high. The method has the advantages of simple process conditions, low production cost and easiness in realization of industrial production, and the whole process meets the environmental protection requirements.

Description

technical field [0001] The invention belongs to the technical field of preparation of rare earth compounds, and in particular relates to a preparation method of nano cerium oxide with strong ultraviolet shielding performance. Background technique [0002] Due to the greater ability of ultraviolet rays to damage the skin, anti-ultraviolet products have developed rapidly in recent years. The main anti-ultraviolet agents currently used include TiO, ZnO, CeO 2 Inorganic particles such as TiO have a large refractive index, and ZnO has a large band gap, both of which have good ultraviolet shielding ability, while CeO 2 The refractive index and forbidden band width are larger, so its ultraviolet shielding ability is better, which is higher than that of TiO and ZnO. Therefore, it is of great significance to develop cerium-based functional materials. [0003] Nano-cerium oxide has strong ultraviolet absorption performance and good absorption of visible light, but because pure nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/235C01F17/10B82Y40/00
CPCC01F17/235C01F17/10B82Y40/00C01P2004/61C01P2004/64C01P2004/32C01P2004/52C01P2006/22
Inventor 杨应亚
Owner CHANGZHOU GEOQUIN NANO NEW MATERIALS
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