Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for controllably preparing strong-luminescence rare earth up-conversion material

A rare earth up-conversion, luminescent material technology, applied in luminescent materials, chemical instruments and methods, nano-optics, etc., can solve the problems of low luminous efficiency and incompletely clear mechanism, and achieve high luminous intensity, uniform size, and easy mass production. Effect

Pending Publication Date: 2020-04-07
SHAANXI NORMAL UNIV
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] There are still some unresolved problems in enhancing the upconversion luminous efficiency of the above methods, such as: (1) how to precisely control the optimal doping concentration of various ions when adjusting rare earth doping ions; (2) introducing synergistic sensitivity When the chemical agent changes the excitation wavelength to optimize the upconversion luminescence, the problem of low luminescence efficiency still needs to be solved; (3) When using plasmon resonance to enhance the upconversion efficiency, the mechanism of plasmon resonance to fluorescence enhancement has not yet been fully clarified

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for controllably preparing strong-luminescence rare earth up-conversion material
  • Method for controllably preparing strong-luminescence rare earth up-conversion material
  • Method for controllably preparing strong-luminescence rare earth up-conversion material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 0.2428g (0.80mmol) YCl 3 ·6H 2 O, 0.0698g (0.18mmol) YbCl 3 ·6H 2 O, 0.0076g (0.02mmol) ErCl 3 ·6H 2 O, 6mL oleic acid and 15mL octadecene were added to a 100mL three-necked flask, and stirred at 160°C for 1 hour under the protection of anhydrous, oxygen-free and inert gas to form a homogeneous transparent solution with a slight yellowish tinge. Then the system was lowered to room temperature, and dissolved with 0.1g (2.5mmol) NaOH and 0.1482g (4mmol) NH 4 10mL of methanol solution of F, stir at room temperature for 60min, heat up to 55-60°C, continue to stir for 60min to remove methanol, then heat up to 110-120°C and vacuum for 20min, and finally heat up to 300°C at a speed of 38°C / min and hold for 60min. After cooling down to room temperature, centrifuge and wash with absolute ethanol to obtain a rare earth up-conversion luminescent material NaYF with a size of 10nm 4 : 18% Yb, 2% Er (see figure 1 ).

[0035] 0.2428g (0.80mmol) YCl 3 ·6H 2 O, 0.0698g (0.18mm...

Embodiment 2

[0043] In this example, 20 mg of NaYF with a size of 10 nm 4 : 18% Yb, 2% Er with 40mg of NaYF with a size of 35nm 4 : 18%Yb, 2%Er are uniformly dispersed in 3mL cyclohexane, other steps are the same as in Example 1, and the rare earth up-conversion material NaYF having a size of 36nm is obtained 4 : 18% Yb, 2% Er (see Figure 8 ).

Embodiment 3

[0045] In this example, 20 mg of NaYF with a size of 10 nm 4 : 18% Yb, 2% Er with 80mg of NaYF with a size of 35nm 4 : 18%Yb, 2%Er are uniformly dispersed in 3mL cyclohexane, other steps are the same as in Example 1, and the rare earth up-conversion material NaYF having a size of 36nm is obtained 4 : 18% Yb, 2% Er (see Figure 9 ).

[0046] In the above examples, two different sizes of rare earth up-conversion luminescent materials NaYF 4 : 18%Yb, 2%Er can also use different sizes of NaGdF 4 : 18% Yb, 2% Er, NaLuF 4 : 18%Yb, 2%Er, NaYbF 4 : 18% Yb, 2% Er, NaLuF 4 : 18%Yb, 2%Tm, etc. are replaced, and then the raw materials of these two different sizes are reacted by the method of the present invention, and the rare earth up-conversion luminescent material with obviously enhanced luminescence can also be obtained.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for controllably preparing a strong-luminescence rare earth up-conversion material, which comprises the following steps: blending and heating two rare earth up-conversion luminescent materials with different sizes at high temperature to prepare nanoparticles with uniform and stable sizes. Compared with a rare earth up-conversion luminescent material with the same size prepared by the traditional solvothermal method, the advantage is that the fluorescence intensity is increased. According to the invention, the common problem of low luminous efficiency of up-conversion nano materials is solved; the preparation method can effectively enhance the luminous efficiency of the up-conversion material, provide a simple, feasible and controllable new method for preparing the high-efficiency luminous up-conversion material, simplify the operation steps of the traditional method for improving the luminous efficiency of the up-conversion material, and is convenient for batch production of the up-conversion nano material with high-efficiency luminescence and uniform particle size.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a preparation method of a fluorescence-enhanced rare earth up-conversion nanometer material. Background technique [0002] Up-conversion luminescent materials can convert long-wave radiation into short-wave radiation, and are usually composed of a matrix, an activator, and a sensitizer. Because of its many advantages such as large anti-Stokes shift, long fluorescence lifetime, high photostability, strong chemical stability, and high signal-to-noise ratio, it has been widely used in biomedical imaging, cancer diagnosis, lighting, and optoelectronic devices. . However, due to the small absorption cross-section of the sensitizer of the up-conversion luminescent material, its luminous efficiency is low, which affects the application of the up-conversion material. Therefore, how to improve the luminous intensity of up-conversion materials has become the prim...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85B82Y20/00B82Y40/00
CPCC09K11/7773B82Y20/00B82Y40/00
Inventor 石峰高嘉忆刘苗莫秀兰武燕龙王婷婷
Owner SHAANXI NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com