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Up-conversion/down-conversion dual-mode light-emitting nanocrystalline and preparation method and application of up-conversion/down-conversion dual-mode light-emitting nanocrystalline

A nanocrystalline, dual-mode technology, applied in nanotechnology, nanotechnology, nano-optics, etc., to achieve high product purity, uniform particle size distribution, and good dispersion

Active Publication Date: 2020-12-15
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, the scheme or route of preparing high-performance rare earth fluoride nanocrystals with strong up-conversion red and down-conversion near-infrared dual-mode fluorescence using near-infrared light as an excitation light source has not been reported yet.

Method used

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  • Up-conversion/down-conversion dual-mode light-emitting nanocrystalline and preparation method and application of up-conversion/down-conversion dual-mode light-emitting nanocrystalline
  • Up-conversion/down-conversion dual-mode light-emitting nanocrystalline and preparation method and application of up-conversion/down-conversion dual-mode light-emitting nanocrystalline
  • Up-conversion/down-conversion dual-mode light-emitting nanocrystalline and preparation method and application of up-conversion/down-conversion dual-mode light-emitting nanocrystalline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Synthesize gadolinium chloride, ytterbium chloride, cerium chloride, holmium chloride, and erbium chloride respectively: at room temperature, mix 20 mmol of the corresponding metal oxide and 60 mmol of concentrated hydrochloric acid in a container, and heat the mixed solution at a constant temperature Slowly heat to 80°C under magnetic stirring on a magnetic stirrer, add 10mL of distilled water and continue to react for 0.5h, cool the obtained solution and filter to obtain a clear and transparent solution, continue to heat at 80°C until chloride crystals are precipitated on the surface of the solution, transfer to Oven drying at 60°C, the obtained solid powder is the chloride of the corresponding metal element;

[0038] (2) Synthesize gadolinium oleate, ytterbium oleate and cerium oleate respectively: Take 20mmol of the corresponding metal chloride, 60mmol of sodium oleate, 30mL of distilled water, 40mL of ethanol and 70mL of n-hexane into the container, and heat the...

Embodiment 2

[0042] (1) Synthesize gadolinium chloride, ytterbium chloride, cerium chloride, holmium chloride, and erbium chloride respectively: at room temperature, mix 30 mmol of the corresponding metal oxide and 180 mmol of concentrated hydrochloric acid in a container, and heat the mixed solution at a constant temperature Slowly heat to 90°C under magnetic stirring on a magnetic stirrer, add 30mL of distilled water and continue to react for 1h, cool the obtained solution and filter to obtain a clear and transparent solution, continue to heat at 90°C until chloride crystals are precipitated on the surface of the solution, transfer to 70 ℃ oven drying, the obtained solid powder is the chloride of the corresponding metal element;

[0043] (2) Synthesize gadolinium oleate, ytterbium oleate and cerium oleate respectively: Take 30mmol of the corresponding metal chloride, 90mmol of sodium oleate, 50mL of distilled water, 60mL of ethanol and 90mL of n-hexane into the container, and heat the mix...

Embodiment 3

[0047] (1) Synthesize gadolinium chloride, ytterbium chloride, cerium chloride, holmium chloride, and erbium chloride respectively: at room temperature, mix 10 mmol of the corresponding metal oxide and 90 mmol of concentrated hydrochloric acid in a container, and heat the mixed solution at a constant temperature Slowly heat to 85°C under magnetic stirring on a magnetic stirrer, add 20mL of distilled water and continue to react for 0.8h, cool the obtained solution and filter to obtain a clear and transparent solution, continue to heat at 85°C until chloride crystals are precipitated on the surface of the solution, transfer to Oven drying at 65°C, the obtained solid powder is the chloride of the corresponding metal element;

[0048] (2) Synthesize gadolinium oleate, ytterbium oleate and cerium oleate respectively: take 10mmol of the corresponding metal chloride, 30mmol of sodium oleate, 40mL of distilled water, 70mL of ethanol and 110mL of n-hexane into the container, and heat th...

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Abstract

The invention discloses an up / down conversion dual-mode light-emitting nanocrystalline and a preparation method and application thereof, and relates to the technical field of nanocrystalline materials. According to the nanocrystal, rare earth chloride is used as a precursor, and monodisperse rare earth fluoride nanoparticles with small particle sizes are prepared as cores under the joint participation of sodium hydroxide and ammonium fluoride; an epitaxial growth method is used, oleic acid and octadecene are used as a mixed solvent, and the rare earth oleate precursor and sodium fluoride jointly act in a high-temperature solvent to realize coating of the shell rare earth fluoride nanocrystalline. The method is simple in synthetic route operation, uniform in product particle size distribution and high in purity, the nanocrystalline is endowed with stronger red and near-infrared two-region fluorescence by doping different rare earth elements and controlling the sizes of a core and a shell in a core-shell structure, and the nanocrystalline can be used as a potential optical imaging contrast agent due to near-infrared fluorescence, so that the contrast agent has a wide application prospect. Due to red light emission, the prepared nanocrystal can be used as a nano energy converter to be applied to light-triggered therapy.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a "sunflower"-shaped red light (emission peak of about 650nm) and near-infrared second region (emission peak of about 1520nm) up / down conversion dual-mode luminescent nanocrystal and its preparation method and application . Background technique [0002] Up-conversion luminescence is an anti-Stokes process, which refers to a luminescence phenomenon that can absorb two or more long-wavelength photons and emit one short-wavelength photon. The hosts of rare earth up-conversion luminescent materials mainly include oxides, fluorides, oxyfluorides, sulfur-containing compounds, halides, etc. Among them, rare earth fluorides have the characteristics of low phonon energy, less non-radiative transition and high element doping concentration. It is an ideal substrate for up-conversion luminescence, so it has broad application prospects in the field of luminescent materials. At present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85C09K11/02B82Y20/00B82Y40/00G01N21/64A61K49/00A61K47/02A61K47/04
CPCA61K47/02A61K49/0019B82Y20/00B82Y40/00C09K11/02C09K11/7773G01N21/6486
Inventor 徐加廷付玉杰吕武斌焦骄王希清王涛
Owner NORTHEAST FORESTRY UNIVERSITY
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