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Near-full-spectrum fluorescent nanocarbon dots and preparation method thereof

A fluorescent nanometer and full-spectrum technology, applied in the field of carbon nanoluminescent materials, can solve the problems of no synthetic fluorescent carbon dots, etc., and achieve the effects of easy industrial production, cheap and easy-to-obtain sources, and low synthesis cost

Active Publication Date: 2016-06-08
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the currently known carbon dot synthesis field, it is impossible to use one raw material to change the ratio to synthesize carbon dots with multiple fluorescent emissions, let alone synthesize fluorescent carbon dots with yellow and orange emission peaks.

Method used

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  • Near-full-spectrum fluorescent nanocarbon dots and preparation method thereof
  • Near-full-spectrum fluorescent nanocarbon dots and preparation method thereof
  • Near-full-spectrum fluorescent nanocarbon dots and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take monoethanolamine and citric acid at a molar ratio of 1:0.05, add deionized water to dissolve, stir evenly, transfer to a hydrothermal kettle, and conduct a hydrothermal reaction at 160°C-250°C for 5h-24h. After the reaction is completed, Let the hydrothermal kettle cool down to room temperature naturally, and the blue solution can be obtained, which is the carbon dot aqueous solution. After the carbon dot aqueous solution is subjected to high-speed centrifugation at 16,000 rpm to remove impurities, it is then placed in a vacuum drying oven to remove carbon by vacuum drying. Point most of the water in the aqueous solution, and the final solution is the carbon dot solution. Take the excitation wavelength of 395nm as an example to test the spectrum.

Embodiment 2

[0033] Take monoethanolamine and citric acid at a molar ratio of 1:0.20, add deionization to dissolve, stir evenly, transfer to a hydrothermal kettle, and conduct a hydrothermal reaction at 160°C-250°C for 5h-24h. After the reaction is completed, make The hydrothermal kettle is naturally cooled to room temperature, and the green solution can be obtained, which is the carbon dot aqueous solution. After the carbon dot aqueous solution is removed by high-speed centrifugation at 16,000 rpm, it is then placed in a vacuum drying oven to remove the carbon dot aqueous solution by vacuum drying. Most of the water in the solution, the final solution is the carbon dot solution. Take the excitation wavelength of 395nm as an example to test the spectrum.

Embodiment 3

[0035] Take monoethanolamine and citric acid at a molar ratio of 1:0.18 or 1:0.23, add deionized water to dissolve, stir evenly, transfer to a hydrothermal kettle, and conduct a hydrothermal reaction at 160°C-250°C for 5h-24h. After the reaction is completed, let the hydrothermal kettle cool down to room temperature naturally, and the green solution can be obtained, which is the carbon dot aqueous solution. Drying removes most of the water in the carbon dot aqueous solution, and the final solution is the carbon dot solution. Taking the excitation wavelength of 395nm as an example, the spectrum is tested.

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Abstract

The invention discloses near-full-spectrum fluorescent nanocarbon dots and a preparation method thereof and belongs to the field of carbon nano-luminescence materials. The wavelength of an emission peak of the carbon point synthesized by the method is 470nm-700nm; the fluorescent emission peak of the carbon point almost has no change along with the change of the emission wavelength; the carbon dots have the characteristics of high fluorescence intensity and stable quantum yield. The synthesis and preparation method comprises the following steps: adding carboxyl-containing organic acid and organic amine into a certain amount of deionized water according to a mole ratio of (1 to 1)-(1 to 0), uniformly stirring and then transferring the deionized water to a hydrothermal reactor, carrying out hydrothermal reaction, then naturally cooling the hydrothermal reactor to room temperature and preparing a carbon dot aqueous solution. According to the near-full-spectrum fluorescent nanocarbon dots and the preparation method of the carbon dots, the raw materials used for synthesizing the carbon dot are wide in sources and low in cost, and are easily available and almost non-toxic; the carbon dot synthesizing period is short; the carbon dot synthesizing equipment is simple.

Description

technical field [0001] The invention belongs to the technical field of carbon nano-luminescent materials, and in particular relates to a near-full-spectrum fluorescent nano-carbon point and a preparation method thereof. Background technique [0002] In 2004, Scrivens et al. reported in the American Chemical Society (JACS) that when purifying single-walled carbon nanotubes prepared by the arc discharge method, carbon quantum dots (ie, carbon dots) were accidentally isolated. Once this research result was reported, it attracted widespread attention. This carbon nanomaterial overcomes many shortcomings of traditional semiconductor quantum dots. It not only has excellent optical properties, but also has good biocompatibility and is easy to realize functionalization. It has good application prospects in the fields of biosensing, analysis and detection, photocatalytic technology, drug delivery, optoelectronic devices, and optical lighting. [0003] Carbon dots refer to spherical ...

Claims

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Application Information

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IPC IPC(8): C09K11/65C01B31/02B82Y30/00
CPCC01P2004/64C09K11/65
Inventor 陈叶青王超陈世旺曾庆光罗坚义
Owner WUYI UNIV
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