a yf 3 :eu 3+ Nanoparticle phosphor and preparation method thereof

Abstract

a YF 3 :Eu 3+ The diffraction angle 2θ of the nanoparticle phosphor is 23.636±0.2°, 24.202±0.2°, 25.665±0.2°, 27.485±0.2°, 30.660±0.2°, 35.692±0.2°, 43.471±0.2°, 45.180±0.2°, 46.575 There are diffraction peaks at ±0.2°, 47.111±0.2°, 48.609±0.2°, 50.929±0.2°, 51.605±0.2°, 52.981±0.2°, 54.555±0.2°. The invention has a unique polyhedron and octahedral structure with directional chamfered corners and edges. The purity of the finished product can be as high as 99.8%, and the particle size is small and uniform. The luminous intensity is high, the luminescence is uniform, and the light color difference is small. The finished product has good gas sensitivity, especially for flammable gases; the production rate of the present invention is high, and the production rate can be as high as 99.1%. The method is simple and easy to implement, has low production cost, does not generate HF in the preparation process, is friendly to people and the environment, is easy to realize mass production, and is worthy of market promotion and application.

Description

technical field [0001] The present invention relates to a kind of YF 3 :Eu 3+ nanomaterials, in particular to a Nanoparticle phosphor and its preparation method. Background technique [0002] Rare earth fluoride nanomaterials have wide bandgap, low phonon vibration energy, high thermal and environmental stability, have become good host materials in luminescent materials, and have potential application prospects in the field of optics. Traditional organic fluorescent dyes have poor photochemical stability, wide absorption and emission bands, severe photobleaching and photolysis, and photolysis products often have a killing effect on organisms, which greatly limits its application range. However, semiconductor fluorescent nanocrystals, which have been widely studied in recent years, are still subject to some limitations due to poor chemical stability and unavoidable biological toxicity. In contrast, rare earth nanomaterials have unique optical, electrical, magnetic and ot...

AI Technical Summary

Problems solved by technology

Among them, the aqueous phase synthesis is the simplest and does not require high equipment requirements. However, usually, the nanoparticles synthesized in the aqueous phase are hydrophobic, and the fluorescence intensity of the particle solution is very weak, which cannot be used for biological analysis.

[0005] At present, it seems that the preparation method of rare earth fluoride nanomaterials will produce toxic and harmful substances such as HF during the preparation process, which is not good for people and the environment. At the same time, it also has complex operations, high production costs, low purity of finished products, and large particle size. Technical problems such as poor particle size uniformity, poor coating effect during use, low luminous intensity, uneven luminescence, and light color difference restrict the development of the field of nanoparticle phosphors

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