Supercharge Your Innovation With Domain-Expert AI Agents!

Preparation method of electron trapping material

An electron capture, rare earth ion technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of poor particle dispersion and uniformity, high preparation cost, large particles of electron capture materials, etc., and achieve mild reaction conditions and luminescent performance. Stable and controllable effect of morphology rules

Inactive Publication Date: 2013-10-09
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-temperature solid-phase synthesis method uses volatile substances that are corrosive to equipment in the preparation process, and contains toxic substances, which is not good for the environment and human health; and its preparation process is complicated, requiring external conditions such as high temperature and even high pressure. High consumption and high preparation cost
What is even more unfavorable is that the electron-capturing material prepared by high-temperature solid-phase synthesis has large particles, poor particle dispersion and uniformity, and the particle shape is difficult to control, which leads to poor luminescence performance of the prepared electron-capturing material. Or the luminous performance is unstable

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
  • Preparation method of electron trapping material
  • Preparation method of electron trapping material
  • Preparation method of electron trapping material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0027] According to one embodiment of the present invention, a method for preparing an electron-trapping material is provided, and the electron-trapping material is doped with rare earth ions Sm 3+ Strontium sulfate, whose chemical formula is Sr 1-x SO 4 :xSm 3+ , where x is the doped rare earth ion Sm 3+ The molar ratio of 0<x≤0.01, said method comprises:

[0028] (1) Prepare Na respectively 2 SO 4 , SrCl 2 and SmCl 3 aqueous solution;

[0029] (2) under stirring conditions, the SmCl 3 solution was added to SrCl 2 in aqueous solution;

[0030] (3) Na 2 SO 4 Aqueous solution is added rapidly in the mixed solution of step (2);

[0031] (4) aging the mixed solution obtained in step (3) for at least 10 hours;

[0032] (5) centrifuging the mixture obtained in step (4) to obtain a solid;

[0033] (6) washing the solid obtained in step (5) with deionized water and ethanol at least three times;

[0034] (7) Vacuum drying the washed solid at a temperature of at least 4...

Embodiment 1

[0045] With constant stirring, 1 mL of absolute ethanol and 0.2% SmCl 3 (relative to the added Sr 2+ molar amount) was added to 10 ml of SrCl 2 (1.0 mol / L) solution. With continued stirring, 5 ml of Na 2 SO 4 (concentration is 1.0 mol / liter), so that [Sr in the mixed solution 2+ ]: [SO 4 2- ] = 2:1, and stirring was continued for 10 minutes. Then, the mixture was aged for 24 hours, then centrifuged, and washed three times with deionized water and ethanol respectively. Finally, vacuum-dry at 60°C for 6 hours to obtain the electron-capturing material Sr 1-x SO 4 :xSm 3+ .

[0046] The morphology and particle size of the materials prepared in Implementation 1 were observed with a Czech TESCAN VEGA II scanning electron microscope. In the SEM electron micrograph of the prepared sample, randomly select 10 particles and test their particle size, see the attached figure 1 . As can be seen from the figure, Example 1 obtains the electron-capturing material Sr 1-x SO 4 :x...

Embodiment 2

[0049] With constant stirring, 1 mL of absolute ethanol and 0.2% SmCl 3 (compared to adding Sr 2+ molar amount) was added to 5 ml of SrCl 2 (1.0 mol / L) solution. With continued stirring, 10 ml of Na 2 SO 4 (1.0 mol / L), so that [Sr in the mixture 2+ ]: [SO4 2- ] = 1:2, and continued stirring for 10 minutes. Then, the mixture was aged for 24 hours, then centrifuged, and washed three times with deionized water and ethanol respectively. Finally, vacuum-dry at 60°C for 6 hours to obtain spherical particles of Sr 1-x SO 4 :xSm 3+ .

[0050] The morphology and particle size of the materials prepared in Implementation 2 were observed with a Czech TESCAN VEGA II scanning electron microscope. In the SEM electron micrograph of the prepared sample, randomly select 10 particles and test their particle size, see the attached figure 2 . As can be seen from the figure, Example 2 obtains the electron-capturing material Sr of spherical particles 1-x SO 4 :xSm 3+ , with an avera...

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
particle sizeaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of an electron trapping material. The electron trapping material is Sr1-xSO4: xSm<3+> doped with raw earth ions Sm<3+>, wherein x is more than 0 and not more than 0.01. The method provided by the invention comprises the steps of: mixing an Na2SO4 aqueous solution, an SrCl2 aqueous solution and an SmCl3 aqueous solution, which are prepared respectively; then ageing the mixed solutions serving as a raw material for at least 10 hours, centrifuging and separating to obtain solids, and washing; vacuumly drying the obtained solids for at least 3 hours at the temperature of at least 45 DEG C to obtain the electron trapping material. According to the method, the electron trapping material with stable luminous property is prepared by regulating the molar ratio R of [Sr<2+>] to [SO4<2->] in the solutions serving as the raw material to be (1:2)-(2:1) and adding / not adding a dispersing agent to control the granularity, shape and the like of the electron trapping material.

Description

technical field [0001] The present invention relates to the technical field of electron capture materials, in particular, the present invention relates to sulfate electron capture materials Sr 1-x SO 4 :xSm 3+ (0<x≤0.01) novel preparation method. Background technique [0002] Electron-trapping materials refer to a class of materials that have a suitable trapping energy level, can trap electrons in the trapping energy level, and can release the trapped electrons in the form of visible light when excited by a certain wavelength of light. Specifically, under the excitation of a certain wavelength of light, the electrons in the ground state are excited to a high-energy excited state, and the electrons that reach the excited state pass through electron tunneling and are then trapped by the local field formed by the trapping center, thereby realizing the energy storage process ; When excited by infrared light, the electrons captured by the trapping center are released from t...

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 Patents(China)
IPC IPC(8): C09K11/56
Inventor 孙家跃杜海燕孙苒荻
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com