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Co-doped red-light fluorescent light-emitting nanocrystalline material as well as preparation method and application thereof

A technology of nanocrystalline materials and red light fluorescence, which is applied in the fields of luminescent materials, fluorescence/phosphorescence, and material analysis through optical means, and can solve the problems of weakened luminous efficiency of organic matter and unstable optical properties

Inactive Publication Date: 2020-04-28
杭州众道光电科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Detection of Pb using fluorescent probes 2+ With the characteristics of high sensitivity and high resolution, the current main research probes include carbon quantum dots, MOF or organic systems, the optical properties of these systems are unstable, for example, the luminous efficiency of organics will decrease with the prolongation of irradiation time

Method used

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  • Co-doped red-light fluorescent light-emitting nanocrystalline material as well as preparation method and application thereof
  • Co-doped red-light fluorescent light-emitting nanocrystalline material as well as preparation method and application thereof
  • Co-doped red-light fluorescent light-emitting nanocrystalline material as well as preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0024] Example 1 10Ca / 6Eu:Bi 2 o 2 Preparation of S nanocrystals

[0025] 1) Add 0.84 mmol of bismuth acetate, 0.06 mmol of europium acetylacetonate, 0.1 mmol of calcium acetate, and 5 ml of oleic acid into a 50 ml three-necked flask at room temperature, raise the temperature to 110°C, and keep it warm for 1 hour;

[0026] 2) After the solution in step 1) is cooled below 50°C, add 10 mmoles of sulfur powder and 20 ml of oleylamine, vacuumize the inside of the three-necked bottle with a mechanical pump for about 10 minutes, then raise the temperature to 120°C, and keep it warm for 30 Minutes, and then under the protection of argon, the temperature was rapidly raised to 310 ° C and kept for 1 hour;

[0027] 3) After the solution in step 2) is cooled to room temperature, add ethanol and centrifuge to obtain a precipitate, and wash the product with a mixture of ethanol:cyclohexane at a ratio of 3:1, and then dry it at 40°C to obtain the final product.

[0028] Powder X-ray diff...

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Abstract

The invention discloses a co-doped red-light fluorescent light-emitting nanocrystalline material as well as a preparation method and application thereof. According to the nanocrystalline material, under the excitation condition of 254 nm, the luminous intensity of Eu<3+> ions is continuously weakened along with the increase of the concentration of Pb<2+> ions; under the excitation condition of 311nm, the luminous intensity of the Eu<3+> ions is not changed along with the increase of the concentration of the Pb<2+> ions; the ratio of the luminous intensity of the Eu<3+> ions to the concentration of the Pb<2+> ions can be applied to ratio type Pb<2+> ion detection; the ratio type fluorescence detection method is not interfered by external factors and has good accuracy. Under the excitationcondition of 254nm, the luminous intensity of the Eu<3+> ions is continuously weakened along with the increase of the concentration of the Pb<2+> ions, the luminous intensity of the Eu<3+> ions is notchanged along with the increase of the concentration of the Pb<2+> ions under the excitation condition of 311 nm, and the ratio of the luminous intensity of the Eu<3+> ions to the Pb<2+> ion concentration can be applied to ratio-type Pb<2+> ion detection.

Description

technical field [0001] The invention belongs to the field of inorganic luminescent materials, and in particular relates to a co-doped red-light fluorescent luminescent nanocrystal material and a preparation method and application thereof. Background technique [0002] Lead is a heavy metal and is toxic. Among all known toxic substances, lead is the most recorded in the book. There are records in ancient books that the use of lead pipes to transport drinking water is dangerous. The public is exposed to lead in many ways. The public is primarily concerned about lead in petroleum products. Pigments contain lead, especially some old brands with high lead content, which has caused many deaths. Therefore, some countries have specially formulated environmental standards to stipulate that the lead content in pigments should be controlled within 600PPM. [0003] The safe limit of lead content in drinking water is generally 100 micrograms per liter, and the maximum acceptable level...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/84G01N21/64
CPCC09K11/7731G01N21/6428
Inventor 陆阳清王凯陈泽楷张鑫洋
Owner 杭州众道光电科技有限公司
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