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Super carbon nanodots with strong near-infrared absorption and its preparation method and application

A carbon nanodot, near-infrared technology, applied in the fields of nanotechnology, nanocarbon, and nanotechnology for materials and surface science, can solve the problems of low photothermal conversion efficiency and low absorption, and improve photothermal conversion performance. , The effect of high biocompatibility and high conversion efficiency

Active Publication Date: 2017-09-12
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the technical problems of low absorption of carbon nano-dots in the near-infrared region and low photothermal conversion efficiency in the near-infrared region in the prior art, and to provide a super carbon nano-dot with strong near-infrared absorption and its preparation Method and Application

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  • Super carbon nanodots with strong near-infrared absorption and its preparation method and application
  • Super carbon nanodots with strong near-infrared absorption and its preparation method and application
  • Super carbon nanodots with strong near-infrared absorption and its preparation method and application

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Embodiment 1

[0052] combine Figure 1-6 Illustrative Example 1

[0053] Super carbon nano-dots with strong near-infrared absorption, the absorption peak is 700nm, assembled by carbon nano-dots, the surface of the carbon nano-dots has amino and pyrrolyl electropositive groups, and also has pyridyl and carboxyl groups and the electronegative group of the hydroxyl group.

[0054] The preparation method of the above-mentioned super carbon nano-dots with strong near-infrared absorption:

[0055] Dissolve citric acid and urea in deionized water at a mass ratio of 1:2 to obtain a transparent solution, place it in a 50ml polytetrafluoroethylene autoclave, react at 160°C for 4h, and freeze-dry the reacted solution at -40°C to obtain Yellow carbon nano dot powder.

[0056] Put the yellow carbon nano-dot powder in a beaker and place it in an environment with a relative humidity of 60% for 14 days. The carbon nano-dots self-assemble under the action of water molecules, and the surface becomes compl...

Embodiment 2

[0063] Super carbon nano-dots with strong near-infrared absorption, the absorption peak is 714nm, assembled by carbon nano-dots, the surface of the carbon nano-dots has electropositive groups of amino and pyrrolyl groups, and also has pyridyl and carboxyl groups and the electronegative group of the hydroxyl group.

[0064] The preparation method of the above-mentioned super carbon nano-dots with strong near-infrared absorption:

[0065] Dissolve citric acid and urea in deionized water at a mass ratio of 1:2 to obtain a transparent solution, place it in a 50ml polytetrafluoroethylene autoclave, react at 160°C for 4h, and freeze-dry the reacted solution at -40°C to obtain Yellow carbon nano dot powder.

[0066] Put the yellow carbon nano-dot powder in a beaker filled with ethanol, then place the beaker in an airtight container filled with water, and place it at 35°C for 20 days. After the water volatilizes, it enters the ethanol. The carbon nano-dots are under the action of wat...

Embodiment 3

[0068] Super carbon nano-dots with strong near-infrared absorption, the absorption peak is 680nm, assembled by carbon nano-dots, the surface of the carbon nano-dots has electropositive groups of amino and pyrrolyl groups, and also has pyridyl and carboxyl groups and the electronegative group of the hydroxyl group.

[0069] The preparation method of the above-mentioned super carbon nano-dots with strong near-infrared absorption:

[0070] Dissolve citric acid and urea in deionized water at a mass ratio of 1:2 to obtain a transparent solution, place it in a 50ml polytetrafluoroethylene autoclave, react at 160°C for 4h, and freeze-dry the reacted solution at -40°C to obtain Yellow carbon nano dot powder.

[0071] Put the yellow carbon nano-dot powder in a beaker and place it in an environment with a relative humidity of 60% for 8 days. The carbon nano-dots self-assemble under the action of water molecules, and the surface becomes completely black. The obtained black solid is disp...

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Abstract

The invention discloses a super-carbon nano-dot with strong near-infrared absorption, a preparation method and application thereof, and belongs to the technical field of carbon nano-materials. The technical problems of low absorption of carbon nano-dots in the near-infrared region and low light-to-heat conversion efficiency in the prior art are solved. The super-carbon nano-dots are self-assembled by carbon nano-dots with both electropositive and electronegative functional groups on the surface, and have absorption peaks in the spectral range of 470-1000nm, and the photothermal energy in this spectral range The conversion efficiency is 30%‑65%. The ultra-carbon nanodots not only have the advantages of small size, high water solubility and good biocompatibility, but also have strong near-infrared light absorption and high-efficiency near-infrared photothermal conversion performance, and can be used as near-infrared photothermal conversion nanomaterials for In the field of energy conversion and medical field.

Description

technical field [0001] The invention belongs to the technical field of carbon nanomaterials, and in particular relates to a super-carbon nano-dot with strong near-infrared absorption and its preparation method and application. Background technique [0002] Photothermal conversion nanomaterials are functional materials that can absorb certain light and generate heat through plasmon resonance or energy transition, thereby causing high temperature locally. Among them, because the wavelength range of near-infrared light endows it with unique optical safety properties, it can penetrate human skin and deep tissues, so the photothermal conversion nanomaterials of near-infrared light have great application potential in biomedicine. [0003] Photothermal therapy is to use materials with high photothermal conversion efficiency, inject them into the human body, use targeted recognition technology to gather near the tumor tissue, and treat them under the irradiation of an external light...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/15C09K11/65B82Y30/00B82Y40/00
Inventor 曲松楠李迪
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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