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.