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Preparation method for red fluorescent carbon dot powder

A technology of red fluorescence and carbon dots, applied in the field of LED fluorescence, to achieve the effect of mild reaction conditions, environmental friendliness and easy promotion

Active Publication Date: 2018-07-06
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most of the synthesized carbon dots have photoluminescence properties of blue light, and there are few reports on red light carbon dots. In addition, red light carbon dots also have quantum size effects and concentration quenching effects. Therefore, it is very necessary to find a A simple method to synthesize stable and luminescent red carbon dots using cheap raw materials as carbon sources, thereby overcoming the limitations of carbon dots in the application field

Method used

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  • Preparation method for red fluorescent carbon dot powder
  • Preparation method for red fluorescent carbon dot powder
  • Preparation method for red fluorescent carbon dot powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Dissolve 0.1 g of 1,2,4-benzenetriamine into 10 ml of polyethylene glycol, transfer the solution to a three-necked flask, treat at 100°C for 1 hour, and cool to room temperature naturally to obtain a red carbon dot solution. The obtained carbon dot solution emits bright red fluorescence under the irradiation of 365nm ultraviolet lamp. The red carbon dot solution was dissolved in ethyl acetate, and its fluorescence turned blue.

Embodiment 2

[0020] Dissolve 0.1 g of 1,2,4-benzenetriamine into 10 ml of polyethylene glycol, transfer the solution to a three-necked flask, treat at 100°C for 1 hour, and cool to room temperature naturally to obtain a red carbon dot solution. The obtained carbon dot solution emits bright red fluorescence under the irradiation of 365nm ultraviolet lamp. Dissolve the red carbon dot solution in organosilane, and its fluorescence turns yellow.

Embodiment 3

[0022] Dissolve 0.1 g of 1,2,4-benzenetriamine into 10 ml of polyethylene glycol, transfer the solution to a three-necked flask, treat at 100°C for 1 hour, and cool to room temperature naturally to obtain a red carbon dot solution. The obtained carbon dot solution emits bright red fluorescence under the irradiation of 365nm ultraviolet lamp. Dissolving the red carbon dot solution in ethanol will not change its fluorescence.

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Abstract

The invention discloses a preparation method for red fluorescent carbon dot powder. According to a technical scheme of the invention, the preparation method comprises the following steps: with 1,2,4-benzenetriamine and polyethylene glycol as raw materials, carrying out a reaction under heating so as to obtain a red carbon dot solution, then mixing the carbon dot solution with silica gel powder, and carrying out spin-drying with a rotary evaporator so as to be able to obtain the red fluorescent carbon dot powder. With the scheme of the invention, the preparation method has the advantage of capability of effectively overcoming the problem of fluorescence quenching of carbon dots.

Description

technical field [0001] The invention belongs to the technical field of LED fluorescence, and specifically refers to a preparation method of red fluorescent carbon dot powder. Background technique [0002] Carbon dots (CarbonDots, CDs) are a new type of carbon nanoparticles with a diameter of less than 10 nanometers that have emerged in recent years. Fluorescent performance is the most prominent performance of carbon dots. Carbon dots have excellent fluorescence properties such as tunable excitation wavelength and emission wavelength, stable fluorescence, resistance to photobleaching, and no light flickering phenomenon. At present, most of the synthesized carbon dots have photoluminescence properties of blue light, and there are few reports on red light carbon dots. In addition, red light carbon dots also have quantum size effects and concentration quenching effects. Therefore, it is very necessary to find a A simple method for synthesizing stable and luminescent red carbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C01B32/15
CPCC09K11/65
Inventor 向卫东袁荣荣梁晓娟
Owner WENZHOU UNIVERSITY