A carbon dot-based room temperature phosphorescent composite material suitable for near-infrared excitation and its preparation method, application and use method

A technology of room temperature phosphorescence and composite materials, which is applied in the direction of luminescent materials, chemical instruments and methods, and climate sustainability, and can solve problems such as large radiation, limited CDPM applications, and high light energy

Active Publication Date: 2022-07-12
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A carbon dot-based room temperature phosphorescent composite material suitable for near-infrared excitation and its preparation method, application and use method
  • A carbon dot-based room temperature phosphorescent composite material suitable for near-infrared excitation and its preparation method, application and use method
  • A carbon dot-based room temperature phosphorescent composite material suitable for near-infrared excitation and its preparation method, application and use method

Examples

Experimental program
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Embodiment 1

[0048] This embodiment discloses and provides a carbon dot-based room temperature phosphorescent composite material suitable for near-infrared excitation, which is composed of NaYF 4 : Yb, Tm rare earth upconversion 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 this embodiment, the preparation method of UM comprises the following steps:

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

[0051] S102: add the NaCl, YCl of the formula amount to the first mixed solution 3 ∙6H 2 O, YbCl 3 ∙6H 2 O and TmCl 3 ∙6H 2 O, mix well, obtain the second mixed solution, wherein, the addition of NaCl is 0.05mmol / mL, YCl 3 ∙6H 2 The amount of O added is 0.1 mmol / mL, YbCl 3 ∙6H 2 The amount of O added is 0.2 mmol / mL, Tm...

Embodiment 2

[0062] This embodiment discloses and provides a carbon dot-based room temperature phosphorescent composite material suitable for near-infrared excitation, which is composed of NaYF 4 : Yb, Tm rare earth upconversion 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 this embodiment, the preparation method of UM comprises the following steps:

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

[0065] S102: add the NaCl, YCl of the formula amount to the first mixed solution 3 ∙6H 2 O, YbCl 3 ∙6H 2 O and TmCl 3 ∙6H 2 O, mix well, obtain the second mixed solution, wherein, the addition amount of NaCl is 0.1mmol / mL, YCl 3 ∙6H 2 The amount of O added is 0.3 mmol / mL, YbCl 3 ∙ The amount of 6H2O added is 0.5 mmol / mL...

Embodiment 3

[0076] This embodiment discloses and provides a carbon dot-based room temperature phosphorescent composite material suitable for near-infrared excitation, which is composed of NaYF 4 : Yb, Tm rare earth upconversion 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 this embodiment, the preparation method of UM comprises the following steps:

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

[0079] S102: add the NaCl, YCl of the formula amount to the first mixed solution 3 ∙6H 2 O, YbCl 3 ∙6H 2 O and TmCl 3 ∙6H 2 O, 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 0.2 mmol / mL, YbCl 3 ∙ The amount of 6H2O added is 0.4 mmol / mL, TmC...

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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 and a preparation method, application and use method thereof. The carbon dot-based room temperature phosphorescent composite material is composed of NaYF 4 : Yb, Tm rare earth up-conversion material and carbon dot based room temperature phosphorescent material, the carbon dot based room temperature phosphorescent composite material can emit bright afterglow under near-infrared excitation, the carbon dot based room temperature phosphorescent composite material is used in the manufacture of anti-counterfeiting products, transmission It has applications in sensing products, information encryption products, optoelectronic 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 a preparation method, application and use method thereof. Background technique [0002] Room temperature phosphorescent materials are a class of long-lived luminescent materials that absorb energy at room temperature and still have a visible afterglow after the radiation stops. This long-life luminescence can eliminate background fluorescence and light scattering interference, so 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. Carbondots-based RTP materials (CDPMs), as a new type of room te...

Claims

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Application Information

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Patent Type & Authority Patents(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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