Rare earth doped lithium yttrium fluoride nanometer material and preparation method and application thereof

A lithium ytterbium fluoride, rare earth doping technology, applied in chemical instruments and methods, nanotechnology, nano-optics and other directions, can solve the problem of inability to meet bioimaging and fluorescent labeling, inability to obtain ytterbium lithium fluoride nanomaterials, nanoparticle shapes. Uneven appearance and other problems, to achieve the effects of excellent luminescence performance, improved quantum yield, and good monodispersity

Inactive Publication Date: 2017-08-11
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The nanoparticles prepared by these two methods have inhomogeneous morphology, large particle size, and poor dispersion, which cannot meet the requirements of biological imaging and fluorescent labeling.
In addition, due to the need for higher nucleation and crystallization temperatures, traditional high-te

Method used

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  • Rare earth doped lithium yttrium fluoride nanometer material and preparation method and application thereof
  • Rare earth doped lithium yttrium fluoride nanometer material and preparation method and application thereof
  • Rare earth doped lithium yttrium fluoride nanometer material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Example 1: LiYbF 4 : Preparation of 2mol% Er nanoparticles. Weigh 1mmol CH 3 COOLi·3H 2 O, 0.02mmol Er(CH 3 COO) 3 4H 2 O and 0.98mmol Yb(CH 3 COO) 3 4H 2 O, then add 8mL oleic acid and 12mL trioctylamine, heat to 120°C with nitrogen gas and keep it warm for 30 minutes to form a transparent solution A, then drop to room temperature; weigh 4mmol of NH 4 F, dissolved in 10mL of methanol, and added dropwise to solution A, continued to stir for 10 minutes to make it fully mixed, heated to 60°C, kept warm for 30 minutes, and formed a transparent solution B; raised to 320°C, kept warm for 1 hour, and cooled to room temperature ; Add 20mL of ethanol to precipitate, separate and wash several times to obtain about 22nm oil-soluble LiYbF 4 : 2mol% Er nanoparticles. Add 112 μL of concentrated hydrochloric acid to 15 mL of absolute ethanol to prepare an acidic solution with pH=1. Disperse oil-soluble nanoparticles in the above-mentioned acidic ethanol solution, centrifug...

Embodiment 2

[0086] Example 2: LiYbF 4 : Preparation of 2mol% Ho nanoparticles. Weigh 1mmol CH 3 COOLi·3H 2 O, 0.02mmol Ho(CH 3 COO) 3 4H 2 O and 0.98mmol Yb(CH 3 COO) 3 4H 2 O, then add 8mL oleic acid and 12mL trioctylamine, heat to 120°C with nitrogen gas and keep it warm for 30 minutes to form a transparent solution A, then drop to room temperature; weigh 4mmol of NH 4 F, dissolved in 10mL of methanol, and added dropwise to solution A, continued to stir for 10 minutes to make it fully mixed, heated to 60°C, kept warm for 30 minutes, and formed a transparent solution B; raised to 320°C, kept warm for 1 hour, and cooled to room temperature ; Add 20mL of ethanol to precipitate, separate and wash several times to obtain about 22nm oil-soluble LiYbF 4 : 2mol% Ho nanoparticles. Add 112 μL of concentrated hydrochloric acid to 15 mL of absolute ethanol to prepare an acidic solution with pH=1. Disperse oil-soluble nanoparticles in the above-mentioned acidic ethanol solution, centrifug...

Embodiment 3

[0087] Example 3: LiYbF 4 : Preparation of 1mol% Tm nanoparticles. Weigh 1mmol CH 3 COOLi·3H 2 O, 0.01mmol Tm (CH 3 COO) 3 4H 2 O and 0.99mmolYb(CH 3 COO) 3 4H 2 O, then add 8mL oleic acid and 12mL trioctylamine, heat to 120°C with nitrogen gas and keep it warm for 30 minutes to form a transparent solution A, then drop to room temperature; weigh 4mmol of NH 4 F, dissolved in 10mL of methanol, and added dropwise to solution A, continued to stir for 10 minutes to make it fully mixed, heated to 60°C, kept warm for 30 minutes, and formed a transparent solution B; raised to 320°C, kept warm for 1 hour, and cooled to room temperature ; Add 20mL of ethanol to precipitate, separate and wash several times to obtain about 22nm oil-soluble LiYbF 4 : 1 mol% Tm nanoparticles. Add 112 μL of concentrated hydrochloric acid to 15 mL of absolute ethanol to prepare an acidic solution with pH=1. Disperse oil-soluble nanoparticles in the above-mentioned acidic ethanol solution, centrifu...

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Abstract

The invention relates to a rare earth doped lithium yttrium fluoride nanometer material and a preparation method and application thereof. A modified high-temperature coprecipitation method is adopted to synthesize the rare earth doped lithium yttrium fluoride nanometer material with upper conversion/lower transfer luminescence, at the same time, epitaxial growth is conducted on the basis of a core, a mono-layer core-shell structure nanometer material which is uniformly covered can be obtained, and a lithium yttrium fluoride based multi-layer core-shell nanometer material is further prepared. The three prepared and obtained materials are good in monodispersity, uniform in particle size and excellent in luminescent property, after acid pickling treatment, water-soluble nanometer particles can be used for biological detection and biological imaging.

Description

technical field [0001] The invention relates to the field of rare earth nano-luminescent materials, in particular to ytterbium-lithium fluoride nano-luminescent materials and a preparation method and application thereof. Background technique [0002] In recent years, rare earth-doped nano-luminescent materials have shown great application value in lighting displays, anti-counterfeiting codes, information storage, optoelectronic devices, solar cells, and biomedicine. Rare earth-doped nanomaterials mainly include phosphates, vanadates, oxides, sulfides, and fluorides. Among them, fluoride is an ideal class of rare earth-doped host materials due to its high chemical stability and low phonon energy. At present, the research on rare earth doped fluorides mainly focuses on sodium yttrium fluoride (NaYF 4 ), sodium gadolinium fluoride (NaGdF 4 ), lithium yttrium fluoride (LiYF 4 ) or lithium lutetium fluoride (LiLuF 4 ) and other systems, for lithium ytterbium fluoride (LiYbF ...

Claims

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Application Information

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IPC IPC(8): C09K11/85B82Y20/00B82Y40/00
CPCC09K11/7773B82Y20/00B82Y40/00
Inventor 陈学元邹麒麟黄萍郑伟
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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