Blue room-temperature phosphorescent carbon dot and preparation method thereof

A room temperature phosphorescence, carbon dot technology, applied in chemical instruments and methods, nano-carbon, nano-optics, etc., can solve the problems of undiscovered patent publications, difficulty in generating room temperature phosphorescence, poor phosphorescence performance, etc., achieve good phosphorescence performance, avoid Background interference, good stability

Inactive Publication Date: 2020-09-25
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few methods for preparing phosphorescent carbon dots at room temperature and most of them have the following problems: 1. The phosphorescence performance is poor (broad phosphorescence peak, multiple phosphorescence peaks, low phosphorescence intensity, short phosphorescence time, etc.); 2. It is difficult to produce Room te

Method used

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  • Blue room-temperature phosphorescent carbon dot and preparation method thereof
  • Blue room-temperature phosphorescent carbon dot and preparation method thereof
  • Blue room-temperature phosphorescent carbon dot and preparation method thereof

Examples

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Embodiment 1

[0025] Water-soluble room-temperature phosphorescent carbon dots were synthesized by hydrothermal method, and the reagents required for the synthesis of the carbon dots were polyacrylic acid (PAA) and 3-aminopropyltrimethoxysilane (APTES). The volume of polyacrylic acid (PAA) is 0.826mL, and the volume of 3-aminopropyltrimethoxysilane (APTES) is 2.369mL. Mix them with 56.73mL of deionized water and react in a hydrothermal kettle at 200°C for 8h After the reaction, the reaction solution was put into a dialysis bag and dialyzed for 2 days to obtain a carbon dot dialysate, and then the obtained carbon dot dialysate was transferred to a 100mL round bottom flask, 2mL ammonia water and 8.0mL TEOS were added, and refluxed at 105°C for 5h. Dialysis was continued for another 3 days, and finally the blue room temperature phosphorescent carbon dots were obtained. Its excitation and emission spectra are shown in figure 1 As shown, the solid line part is the excitation spectrum, and the d...

Embodiment 2

[0027] Water-soluble room-temperature phosphorescent carbon dots were synthesized by hydrothermal method, and the reagents required for the synthesis of the carbon dots were polyacrylic acid (PAA) and 3-aminopropyltrimethoxysilane (APTES). The volume of polyacrylic acid (PAA) is 1.055mL, the volume of 3-aminopropyltrimethoxysilane (APTES) is 3.943mL, mix them with 44.90mL of deionized water, and react in a hydrothermal kettle at 210°C for 6h After the reaction, the reaction solution was put into a dialysis bag and dialyzed for 2 days to obtain a carbon dot dialysate, and then the obtained carbon dot dialysate was transferred to a 100mL round bottom flask, 1.5mL ammonia water and 5.0mL TEOS were added, and refluxed at 95°C for 6h , and then continued dialysis for 3 days, and finally obtained the blue room temperature phosphorescent carbon dots. The excitation wavelength of carbon dots is 355nm, the emission peak is at about 417nm, and the phosphorescence duration can reach 30s....

Embodiment 3

[0029] Water-soluble room-temperature phosphorescent carbon dots were synthesized by hydrothermal method, and the reagents required for the synthesis of the carbon dots were polyacrylic acid (PAA) and 3-aminopropyltrimethoxysilane (APTES). The volume of polyacrylic acid (PAA) is 1.376mL, the volume of 3-aminopropyltrimethoxysilane (APTES) is 4.500mL, mix them with 24.0mL of deionized water, and react in a hydrothermal kettle at 220°C for 10h After the reaction, the reaction solution was put into a dialysis bag and dialyzed for 2 days to obtain a carbon dot dialysate, and then the obtained carbon dot dialysate was transferred to a 100mL round bottom flask, 1.0mL ammonia water and 7.0mL TEOS were added, and refluxed at 100°C for 3h , and then continued dialysis for 3 days, and finally obtained the blue room temperature phosphorescent carbon dots. The excitation wavelength of the carbon dots is 349nm, the emission peak is at about 423nm, and the phosphorescence duration can reach...

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Abstract

The invention discloses a blue room-temperature phosphorescent carbon dot and a preparation method thereof, and belongs to the technical field of luminescent carbon materials. Polyacrylic acid, 3-aminopropyltrimethoxysilane and deionized water are uniformly mixed, the mixed solution is transferred into a reaction kettle for hydrothermal reaction, dialysis is carried out at the end of reaction, theobtained dialysate, ammonia water and tetraethyl orthosilicate are subjected to reflux silicon coating treatment, the room-temperature phosphorescent carbon dot with good water solubility is obtainedthrough dialysis, the excitation wavelength range is 290-400nm, the fluorescence emission peak can be adjusted between 410nm and 440nm along with the change of the excitation wavelength, and the phosphorescence duration can reach 30s. The method disclosed by the invention is simple, feasible, green and environment-friendly, the required raw materials are easy to obtain, no toxic reagent is addedin the synthesis process, the method is convenient and safe, and the synthesized room-temperature phosphorescent carbon dot is stable in performance and has excellent properties such as strong phosphorescence intensity and long phosphorescence time.

Description

technical field [0001] The invention belongs to the technical field of luminescent carbon materials, and in particular relates to a blue room-temperature phosphorescent carbon point and a preparation method thereof, which can be used for biomarkers, biosensing, biochemical analysis, and the like. Background technique [0002] In recent years, as a new type of fluorescent nanomaterial, carbon dots not only resist photobleaching, have tunable wavelength, and have good optical properties, but also can achieve surface functionalization to improve biocompatibility. Catalysis and other fields show great application potential. Although previous studies have extensively explored the photoluminescence properties of carbon dots, their phosphorescence and delayed fluorescence properties have been less studied. As a new afterglow material, room temperature phosphorescent carbon dots can make up for the shortcomings of traditional afterglow materials due to their advantages such as low ...

Claims

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Application Information

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IPC IPC(8): C01B32/15C09K11/65B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/65C01B32/15
Inventor 潘再法顾丹玉邵康
Owner ZHEJIANG UNIV OF TECH
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