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Room-temperature phosphorescent carbon dot compound and preparation method thereof

A room temperature phosphorescence and composite technology, which is applied to carbon dot composite materials, the preparation of the carbon dot composite, the field of carbon dot composite, can solve the problems of complex preparation and processing process, complicated steps, etc., and achieves high phosphorescence efficiency and good Effect of Room Temperature Phosphorescence Properties

Active Publication Date: 2020-09-01
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This requires a complicated preparation and processing process. Generally, a two-step method is used to prepare phosphorescent carbon dots at room temperature, and then compound them with the matrix material, which has the disadvantage of complicated steps.

Method used

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  • Room-temperature phosphorescent carbon dot compound and preparation method thereof
  • Room-temperature phosphorescent carbon dot compound and preparation method thereof
  • Room-temperature phosphorescent carbon dot compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take 10 mL of formamide, mix it with 10 mL of ethylene glycol, and then add 1.6 g of phthalic acid, stir, mix and disperse evenly at room temperature to obtain a reaction solution.

[0035] The above reaction solution was placed in a 40 mL stainless steel autoclave lined with polytetrafluoroethylene, and solvothermally reacted in an oven at 220 ° C for 6 h.

[0036] After the reaction was completed and cooled to room temperature, the obtained solid-liquid mixed product was taken out and vacuum-filtered with a 0.22 μm microporous membrane. After the obtained solid was dried in a drying oven at 60° C., an off-white room temperature phosphorescent carbon dot composite powder solid was obtained.

[0037] figure 1 It is the physical picture of the room temperature phosphorescent carbon dot composite prepared above under the irradiation of fluorescent lamp and 365nm ultraviolet lamp respectively, and after stopping the ultraviolet irradiation. The figure shows that the com...

Embodiment 2

[0050] Take 10 mL of formamide, mix it with 10 mL of ethylene glycol, and then add 2.4 g of phthalic acid, stir, mix and disperse evenly at room temperature to obtain a reaction solution.

[0051] The above reaction solution was placed in a 40 mL stainless steel autoclave lined with polytetrafluoroethylene, and solvothermally reacted in an oven at 220 ° C for 6 h.

[0052] After the reaction was completed and cooled to room temperature, the obtained solid-liquid mixed product was taken out and vacuum-filtered with a 0.22 μm microporous membrane. The obtained solid was dried in a drying oven at 60° C. to obtain an off-white powdery solid.

[0053] After irradiating the powdered solid obtained above with a 365 nm ultraviolet lamp for 3-5 seconds, stop the ultraviolet irradiation, and it can be observed that the powdered solid emits green phosphorescence.

Embodiment 3

[0055] Take 10 mL of formamide, mix it with 10 mL of ethylene glycol, and then add 1.6 g of phthalic acid, stir, mix and disperse evenly at room temperature to obtain a reaction solution.

[0056] The above reaction solution was placed in a 40 mL stainless steel autoclave lined with polytetrafluoroethylene, and solvothermally reacted in an oven at 220 ° C for 4 h.

[0057] After the reaction was completed and cooled to room temperature, the obtained solid-liquid mixed product was taken out and vacuum-filtered with a 0.22 μm microporous membrane. The obtained solid was dried in a drying oven at 60° C. to obtain an off-white powdery solid capable of emitting green phosphorescence.

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Abstract

The invention discloses a room-temperature phosphorescent carbon dot compound, and a preparation method thereof. According to the preparation method, phthalic acid is taken as a carbon source, formamide is taken as a nitrogen source, ethylene glycol is taken as a solvent, and a solvothermal method is adopted to directly prepare the room-temperature phosphorescent carbon dot compound powder. The room-temperature phosphorescent carbon dot compound disclosed by the invention emits blue fluorescence under ultraviolet irradiation, and generates green phosphorescence after irradiation is stopped. The room-temperature phosphorescent carbon dot compound is high in phosphorescent efficiency and can be used as a phosphorescent material to be applied to the technical fields of photoelectric devices,safety anti-counterfeiting, biological imaging and the like.

Description

technical field [0001] The invention belongs to the technical field of phosphorescent luminescent materials, and in particular relates to a carbon dot composite, in particular to a carbon dot composite capable of emitting phosphorescence at room temperature, and a preparation method of the carbon dot composite. Background technique [0002] Carbon dots are quasi-zero-dimensional carbon nanomaterials with a particle size of less than 10nm. They are monodisperse spherical quantum dots with a carbon structure as the basic skeleton and a large number of organic groups distributed on the surface. They often have specific photoluminescent properties. [0003] As a new type of organic phosphorescent material, compared with traditional inorganic and organic phosphorescent materials, carbon dots have the advantages of good biocompatibility, low toxicity, mild and environmentally friendly preparation conditions, flexible and diverse preparation methods, and wide sources of preparation ...

Claims

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Application Information

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IPC IPC(8): C09K11/65C09K11/06B82Y30/00B82Y40/00C01B32/15C09D11/50G01N21/64
CPCC09K11/65C09K11/0883C09K11/06B82Y30/00B82Y40/00C01B32/15C09D11/50G01N21/64
Inventor 郑静霞杨永珍郑延宁卢太平刘旭光许并社
Owner TAIYUAN UNIV OF TECH
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