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A kind of colorful fluorescent powder and its microwave preparation method and application

A kind of colorful and fluorescent powder technology, applied in the field of fluorescent materials, can solve the problems of limited application and difficult preparation of fluorescent powder, achieve good luminous characteristics, eliminate aggregation-induced quenching effect, and simple synthesis method

Active Publication Date: 2021-04-06
QINGDAO AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although these fluorescent substances have excellent optical properties in solution, in the solid state, the fluorescence will be quenched due to self-aggregation, which limits their application in the solid state, and it is difficult to prepare phosphors

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  • A kind of colorful fluorescent powder and its microwave preparation method and application
  • A kind of colorful fluorescent powder and its microwave preparation method and application
  • A kind of colorful fluorescent powder and its microwave preparation method and application

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preparation example Construction

[0049] The invention provides a microwave preparation method of colorful fluorescent powder, comprising the following steps:

[0050] (1) Preparation of fluorescent substance solution: the substance capable of fluorescing is prepared into an aqueous solution of a certain concentration or an ethanol solution; in the present invention, it can be understood that the substance capable of fluorescing in an aqueous medium is prepared into an aqueous solution of a certain concentration, Or prepare a substance that can fluoresce in an ethanol medium into an ethanol solution of a certain concentration;

[0051] (2) Preparation of saturated salt solution: the salt is prepared into a saturated salt solution, and stirred evenly after adding a certain amount of polyethylene glycol to the saturated salt solution;

[0052] (3) Pipette a certain volume of the fluorescent substance solution in step (1) and the saturated salt solution containing polyethylene glycol in step (2), and add the fluo...

Embodiment 1

[0066] 1. Preparation of green carbon quantum dots: 1.0 mL of polyethylene glycol 400 and 30.0 mg of rhodamine B were dissolved in 15.0 mL of 0.67M sodium hydroxide solution. Subsequently, the solution was transferred to a stainless steel autoclave lined with polytetrafluoroethylene and heated hydrothermally at 180 °C for 8 hours. After naturally cooling to room temperature, the green solution was neutralized with dilute hydrochloric acid solution. The solution was dialyzed with ultrapure water for 72 hours through a dialysis membrane with a molecular weight cut-off of 1000 Da, then filtered through a 0.45 μm filter membrane to remove large particles, and then concentrated by a rotary evaporator at 65 °C and reduced pressure. Finally, the green light carbon quantum dots (Green light carbon quantum dots hereinafter referred to as G-CDs) powder were collected by freeze-drying.

[0067] 2. The preparation of the yellow fluorescent powder in this embodiment:

[0068] (1) Prepara...

Embodiment 2

[0074] 1. Preparation of blue-light carbon quantum dots: Dissolve 100.0 mg of citric acid and 2.0 mL of ethylenediamine in 15.0 mL of ultrapure water. Subsequently, the solution was transferred to a stainless steel autoclave lined with polytetrafluoroethylene and heated hydrothermally at 180 °C for 8 h. After naturally cooling to room temperature, the blue solution was neutralized with dilute hydrochloric acid solution. The solution was subjected to ultrapure water dialysis for 48 hours through a dialysis membrane with a molecular weight cut-off of 1000 Da, then filtered through a 0.45 μm filter membrane to remove large particles, and then concentrated under reduced pressure by a rotary evaporator at 65 °C. Finally, blue-light carbon quantum dots (blue-light carbon quantum dots hereinafter referred to as B-CDs) powders were collected by freeze-drying.

[0075] 2. Preparation of the blue light phosphor in this embodiment:

[0076] (1) Preparation of B-CDs solution: Weigh 10 m...

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Abstract

The invention provides a microwave preparation method of colorful fluorescent powder. The fluorescent substance is prepared into a certain concentration of aqueous solution or ethanol solution; the salt is prepared into a saturated salt solution, and a certain amount of polyethylene glycol is added to the saturated salt solution. Stir evenly after alcohol; pipette a certain volume of fluorescent substance solution into a saturated salt solution containing polyethylene glycol and mix evenly; put the mixed solution in the above steps into a microwave oven for microwave reaction to solid powder, and the product is fluorescent powder . The preparation and synthesis method of the fluorescent powder in the invention is simple and the reaction is rapid. The prepared fluorescent powder has the superior optical properties of the fluorescent substance, maintains and improves the luminous properties of the fluorescent substance in solution, and realizes efficient solid luminescence. Moreover, the prepared fluorescent powder has the advantages of being environmentally friendly, low in cost, difficult to agglomerate, simple and practical, can be used for laser lighting, LED lighting or luminous materials, and is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of fluorescent materials, in particular to a colorful fluorescent powder and a microwave preparation method and application thereof. Background technique [0002] Due to the characteristics of good thermal stability, safety and environmental protection, phosphor powder has been widely used in the production of LED and luminous materials. The traditional fluorescent materials are mainly composed of two categories: antimony, manganese-activated calcium halophosphorus phosphors and rare earth three-color phosphors. These two types of phosphors contain heavy metal ions or rare earth metal ions, and these phosphors The preparation process of phosphor is complex and expensive, which limits the application of phosphor powder in various fields such as photoelectric screens and LEDs. In particular, some phosphors containing heavy metal ions or radioactive substances will cause serious environmental pollution and cause harm to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65H01L33/50
CPCC09K11/65H01L33/502
Inventor 孙晓波王进平马攀攀
Owner QINGDAO AGRI UNIV
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