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A kind of sulfide near-infrared long afterglow luminescent material and its preparation method and application

A technology of luminescent materials and sulfides, applied in luminescent materials, chemical instruments and methods, and material analysis through optical means, can solve the problems of fewer luminescent centers and fewer types, and achieve simple preparation process, enhanced afterglow intensity and afterglow Decay time, effect of improving defect distribution

Active Publication Date: 2017-10-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But now there are still very few types of this near-infrared material, and there are very few luminescent centers.

Method used

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  • A kind of sulfide near-infrared long afterglow luminescent material and its preparation method and application
  • A kind of sulfide near-infrared long afterglow luminescent material and its preparation method and application
  • A kind of sulfide near-infrared long afterglow luminescent material and its preparation method and application

Examples

Experimental program
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Embodiment 1

[0030] A preparation method of a trivalent thulium ion-doped calcium sulfide near-infrared long-lasting luminescent material:

[0031] According to the following composition: matrix is ​​CaS, Tm 3+ The doping amount is 0.1mol%; Weigh calcium sulfate and thulium oxide respectively, grind and mix them in reducing atmosphere (5% H 2 +95%N 2 ) from room temperature to 1000°C, after calcination for 5 hours, turn off the nitrogen and hydrogen gas, and pass in CS 2 gas or H 2 S gas, calcined for 1 hour and then cooled to room temperature with the furnace.

[0032] The long afterglow spectrum of the near-infrared long afterglow luminescent material prepared in this embodiment is as follows: figure 1 As shown, after irradiating with 254 nm ultraviolet light for 10 minutes, after testing at an interval of 30 seconds, near-infrared long afterglow luminescence was obtained, and the luminescence peaks were located at 365, 450, 704, 790, and 810 nm. like figure 2 As shown, the near-i...

Embodiment 2

[0034] A preparation method of a trivalent thulium ion-doped calcium sulfide near-infrared long-lasting luminescent material:

[0035] According to the following composition: matrix is ​​CaS, Tm 3+ 、Er 3+ The doping amount is respectively 10mol%, 20mol%; Calcium sulfate, thulium oxide, erbium oxide are weighed respectively, after being ground and mixed, they are placed in a reducing atmosphere (5% H 2 +95%N 2 ) from room temperature to 1000°C, after calcination for 5 hours, turn off the nitrogen and hydrogen gas, and pass in CS 2 gas or H 2 S gas, calcined for 1 hour and then cooled to room temperature with the furnace.

[0036] The long afterglow spectrum of the near-infrared long afterglow luminescent material prepared in this embodiment is as follows: Figure 4 As shown, after irradiating with 254 nm ultraviolet light for 10 minutes, after testing at an interval of 30 seconds, near-infrared long afterglow luminescence was obtained, and the luminescence peaks were locat...

Embodiment 3

[0038] A preparation method of a trivalent thulium ion-doped calcium sulfide near-infrared long-lasting luminescent material:

[0039] According to the following composition: matrix is ​​CaS, Tm 3+ 、Er 3+ The doping amount is 5mol%, 0.01mol% respectively; Calcium sulfate, thulium oxide, erbium oxide are weighed respectively, after being ground and mixed, they are placed in a reducing atmosphere (5% H 2 +95%N 2 ) from room temperature to 1000°C, after calcination for 5 hours, turn off the nitrogen and hydrogen gas, and pass in CS 2 gas or H 2 S gas, calcined for 1 hour and then cooled to room temperature with the furnace.

[0040] The near-infrared long-lasting luminescent material prepared in this example was irradiated with ultraviolet light at 254 nanometers for 10 minutes, and tested after an interval of 30 seconds. The near-infrared long-lasting luminescence was obtained, and the luminescence peaks were located at 365, 450, 704, 790, and 810 nanometers. . like Imag...

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Abstract

The invention discloses a near-infrared long-afterglow sulfide luminescent material. CaS is taken as a base material, and the base material is doped with 0.1-10mol% of Tm2O3 and 0-20mol% of Er2O3. The invention further discloses a preparation method of the near-infrared long-afterglow sulfide luminescent material. The method comprises steps as follows: (1) weighing of materials: weighing CaS, Tm2O3 and Er2O3 respectively; (2) grinding and evenly mixing the materials, and then calcining the materials in a reducing atmosphere at 950-1,050 DEG C for 4-5 h. The afterglow luminescence peaks of the near-infrared long-afterglow sulfide luminescent material are located at 365, 450, 704, 790 and 810 nanometers, the afterglow decay time of the luminescence peak at the 810 nano is as long as 100 min, and the material can be used for fluorescence labeling for near-infrared optical bioimaging.

Description

technical field [0001] The invention relates to a near-infrared long-lasting luminescent material, in particular to a sulfide near-infrared long-lasting luminescent material and a preparation method and application thereof. Background technique [0002] Optical imaging, using photons as an information source, represents a rapidly expanding field with direct applications in pharmacology, molecular cell biology, and diagnostics. However, this technique still has many limitations, especially the tissue autofluorescence produced by in vivo illumination and the weak tissue permeability under short-wave excitation light irradiation. In order to overcome these difficulties, scientists have studied a series of inorganic light-emitting materials, which emit light in the near-infrared region (NIR). Molecules emit near-infrared light (700-1100nm), which can be used for the detection of living molecular targets, because biological blood and Tissue is relatively transparent in this wave...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/56G01N21/64
CPCC09K11/7768G01N21/6428
Inventor 邱建荣李杨陈汝春刘时剑
Owner SOUTH CHINA UNIV OF TECH