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Carbon dot-based room-temperature phosphorescent composite material suitable for near-infrared excitation as well as preparation method, application and using method of carbon dot-based room-temperature phosphorescent composite material

A room temperature phosphorescence, composite material technology

Active Publication Date: 2021-11-02
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still deficiencies in the current CDPM: the adjustment of the excitation wavelength of CDPM is still a challenge, and the current CDPM can only be excited by ultraviolet (UV) light. Stimulating CDPM undoubtedly severely limits the application of CDPM in production

Method used

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  • Carbon dot-based room-temperature phosphorescent composite material suitable for near-infrared excitation as well as preparation method, application and using method of carbon dot-based room-temperature phosphorescent composite material
  • Carbon dot-based room-temperature phosphorescent composite material suitable for near-infrared excitation as well as preparation method, application and using method of carbon dot-based room-temperature phosphorescent composite material
  • Carbon dot-based room-temperature phosphorescent composite material suitable for near-infrared excitation as well as preparation method, application and using method of carbon dot-based room-temperature phosphorescent composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment discloses to provide a carbon dot-based room temperature phosphorescent composite material suitable for near-infrared excitation, which is made of NaYF 4 : Composition of Yb, Tm rare earth up-conversion material (UM) and blue afterglow carbon dot-based room temperature phosphorescent material (B-CDPM). The weight ratio of UM to B-CDPM is 1:2.

[0049] In the present embodiment, the preparation method of UM comprises the following steps:

[0050] S101: uniformly mix ethanol, ammonia water, and oleic acid in a formula amount to obtain a first mixed solution, wherein the ratio of the amounts of ethanol, ammonia water, and oleic acid is 20:1:10;

[0051] S102: Adding formula amounts of NaCl and YCl to the first mixed solution 3 ·6H 2 O, YbCl 3 ·6H 2 O and TmCl 3 ·6H 2 0, mixed evenly to obtain the second mixed solution, wherein the addition of NaCl was 0.05mmol / mL, YCl 3 ·6H 2 The amount of O added is 0.1mmol / mL, YbCl 3 ·6H 2 The amount of O added...

Embodiment 2

[0062] This embodiment discloses to provide a carbon dot-based room temperature phosphorescent composite material suitable for near-infrared excitation, which is made of NaYF 4 : Composition of Yb, Tm rare earth up-conversion material (UM) and cyan afterglow carbon dot-based room temperature phosphorescent material (C-CDPM). The weight ratio of UM to C-CDPM is 1:2.

[0063] In the present embodiment, the preparation method of UM comprises the following steps:

[0064] S101: uniformly mix the ethanol, ammonia water and oleic acid in the formulated amount to obtain a first mixed solution, wherein the ratio of the amount of ethanol, ammonia water and oleic acid is 20:4:30;

[0065] S102: Adding formula amounts of NaCl and YCl to the first mixed solution 3 ·6H 2 O, YbCl 3 ·6H 2 O and TmCl 3 ·6H 2 0, mixed evenly to obtain the second mixed solution, wherein the addition of NaCl was 0.1mmol / mL, YCl 3 ·6H 2 The amount of O added is 0.3mmol / mL, YbCl 3 The amount of 6H2O adde...

Embodiment 3

[0076] This embodiment discloses to provide a carbon dot-based room temperature phosphorescent composite material suitable for near-infrared excitation, which is made of NaYF 4 : Composition of Yb, Tm rare earth up-conversion material (UM) and green afterglow carbon dot-based room temperature phosphorescent material (G-CDPM). The weight ratio of UM to B-CDPM is 1:2.

[0077] In the present embodiment, the preparation method of UM comprises the following steps:

[0078] S101: uniformly mix the ethanol, ammonia water and oleic acid in the formulated amount to obtain a first mixed solution, wherein the ratio of the amount of ethanol, ammonia water and oleic acid is 20:3:15;

[0079] S102: Adding formula amounts of NaCl and YCl to the first mixed solution 3 ·6H 2 O, YbCl 3 ·6H 2 O and TmCl 3 ·6H 2 0, mix well, obtain the second mixed solution, wherein, the addition of NaCl is 0.08mmol / mL, YCl 3 ·6H 2 The amount of O added is 0.2mmol / mL, YbCl 3 The amount of 6H2O added is...

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Abstract

The invention relates to the technical field of new materials, in particular to a carbon dot-based room-temperature phosphorescent composite material suitable for near-infrared excitation as well as a preparation method, application and a using method of the carbon dot-based room-temperature phosphorescent composite material. The carbon dot-based room-temperature phosphorescent composite material is prepared from a NaYF4: Yb, Tm rare earth upconversion material and a carbon dot-based room-temperature phosphorescent material. The carbon dot-based room-temperature phosphorescent composite material can emit bright afterglow under near-infrared excitation, and has application in manufacturing of anti-counterfeiting products, sensing products, information encryption products, photoelectric device products or biological imaging products.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a carbon-dot-based room-temperature phosphorescent composite material suitable for near-infrared excitation and its preparation method, application and use method. Background technique [0002] Room temperature phosphorescent materials are a class of long-life luminescent materials that absorb energy at room temperature and still have a visible afterglow after the radiation stops. This long-lived luminescence can eliminate background fluorescence and light scattering interference. Therefore, room temperature phosphorescent materials have irreplaceable advantages over fluorescent materials in the fields of anti-counterfeiting, sensing, information encryption, optoelectronic devices, and biological imaging. [0003] In recent years, room-temperature phosphorescence has been continuously discovered in carbon dots. Carbon dots-based RTP materials (CDPMs), as a new type of room...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C09K11/85
CPCC09K11/7773C09K11/65Y02B20/00
Inventor 庄健乐魏浩鹏郑义浩许晓凯刘应亮胡超凡
Owner SOUTH CHINA AGRI UNIV
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