Method for preparing upcoversion nanocrystalline on rare-earth adulterating fluoride

Abstract

The present invention relates to an improved method for preparing an upcoversion nanocrystalline on a rare-earth adulterating fluoride which includes steps as follows: weighing rare-earth nitrates Ln(NO3)3 or rare-earth chlorides LnCl3, adding de-ionized water for confecting combined stock solution with 0.05-0.2 mol / l concentration; adding mesoporous molecular screen powder into the solution, ultrasonic treatment, mixing continuously, filtering, deposition bathing, drying; adding the obtained solid powder into fluor oligosol or ammonium fluoride water solution, stirring for reacting thoroughly; moving the reaction mixer into a reactor, water heat treating 8-48 hours under temperature 100-180 deg c; placing the product into a fluohydric acid solution to soak for removing molecular screen forwork, bathing and vacuum drying for obtaining upcoversion irradiancy nanocrystalline of rare-earth adulterating fluoride with less than 10 nm size. The upcoversion irradiancy nanocrystalline does not agglomeration and can obtain globular shape particle with uniform decentralized.

Description

Technical field

[0001] The invention relates to an improved method for preparing rare earth-doped fluoride upconversion nanocrystals. Background technique

[0002] Upconversion luminescence refers to the use of low-energy light excitation to obtain high-energy light. It is widely used in near infrared light detection, imaging and lasers. In recent years, because of its high detection sensitivity, up-conversion fluorescent materials, as a new type of fluorescent markers, have broad application prospects in drug screening, biomolecular recognition, immunoassays and clinical diagnosis. As a fluorescent labeling material for biomolecules, especially when used for in vivo labeling, due to the needs of metabolism, the material itself is required to be small in size, uniform in distribution, good in dispersibility, and soluble in water. At present, the commonly used methods for synthesizing rare earth upconversion luminescent nanocrystals include high-temperature thermal solvent synthes...