Method for preparing rare-earth fluoride nanometer mesoporous spheres

Abstract

The invention relates to a method for preparing rare-earth fluoride nanometer mesoporous spheres, and belongs to the technical field of the preparation process of inorganic nanometer materials. The method comprises the following key points of: mixing ionic liquid purchased at the market, such as typical 1-butyl-3-methylimidazolium tetrafluoroborate and absolute ethyl alcohol serving as an organic solvent in a volume ratio of 1:1-1:3 for ultrasonic processing for 5 to 10 minutes; dissolving rare-earth compounds in the mixed solution for stirring for 10 to 48 hours at the temperature of between 10 and 40 DEG C or ultrasonic processing for 1 to 6 hours, wherein the molar ratio of the using amount of the rare-earth compounds to the ionic liquid is 1:10-1:40; performing centrifugal separation on products, and washing the separated products by using deionized water and the absolute ethyl alcohol; and drying the washed products at the temperature of 60 DEG C to prepare the rare-earth fluoride nanometer mesoporous spheres finally. In alcoholic solution of the rare-earth fluoride nanometer mesoporous spheres, the prepared products have a structure of the mesoporous spheres formed by accumulating nanometer granules, the diameter of the rare-earth fluoride nanometer mesoporous spheres is between 50 and 200 nanometers, and the bore diameter is less than 5 nanometers. The products can be applied in the fields of catalysis, biology, medicine and photics.

Description

technical field [0001] The invention relates to a preparation method of rare earth fluoride nano mesoporous spheres, belonging to the technical field of inorganic nano material preparation technology. Background technique [0002] my country is very rich in rare earth resources, accounting for more than 80% of the world's proven reserves, and its industrial reserves rank first in the world. Rare earth materials have been widely used in high-energy magnetic devices, light-emitting devices, catalysts and other functional materials due to their unique electrical, optical and chemical properties. As an important rare earth compound, rare earth fluoride is widely used in the fields of luminescence, medicine, biology and lubrication. [0003] At present, for the preparation of rare earth fluoride nanostructures, Wang Xun et al. reported a method for preparing rare earth fluoride dispersed nano-ions by hydrothermal method, but this method uses NaF or NH 4 HF 2 and other toxic fl...

AI Technical Summary

Problems solved by technology

Chinese patent CN10106675775A disperses the alcoholic solution of the rare earth compound into the ionic liquid, and under solvothermal conditions at 50-200 degrees, the high temperature and high pressure ionic liquid decomposes to produce fluoride ions and react with the rare earth ions for 5-20 hours to obtain disc-shaped nanoparticles. This reaction requires High temperature and high pressure not only consume more energy, but also the amount of reaction products is very small, which reduces the synthesis efficiency

[0004] To sum up, the method described above generally has many and complicated procedures, and the reaction needs to be carried out under high temperature and high pressure conditions or a toxic fluorine source is used. The entire reaction system must have good anti-fluorine pollution measures, and the production scale is not easy to expand.

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