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Preparation method and application of water-dispersible carbon nano-onion

A carbon nano-onion, dispersive technology, applied in the field of nano-materials, can solve the problems of low photothermal conversion rate of carbon nano-materials, complex preparation of carbon nano-onions, etc., achieve good photothermal stability, high photothermal stability, cell The effect of low toxicity

Active Publication Date: 2019-05-31
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the invention: In view of the complex preparation of carbon nano-onions in the prior art, and the low light-to-heat conversion rate of carbon nano-materials prepared from amorphous carbon, the present invention provides a kind of candle ash as raw material, prepared by a simple method The method of the water-dispersible carbon nano-onion also provides the application of the prepared water-dispersible carbon nano-onion with excellent performance and high light-to-heat conversion rate

Method used

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  • Preparation method and application of water-dispersible carbon nano-onion
  • Preparation method and application of water-dispersible carbon nano-onion
  • Preparation method and application of water-dispersible carbon nano-onion

Examples

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Embodiment 1

[0033] A preparation method of water-dispersible carbon nano-onion, comprising the following steps:

[0034] (1) Preparation of candle ashes: move the glass slide back and forth in the outer flame of the burning candle, remove the flame after the surface of the glass slide is covered with a uniform layer of candle ashes, cool the glass slide to room temperature, and collect the candle ashes;

[0035] (2) Oxidation reaction: add the candle ashes collected in step (1) to a mixed solution of concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 2:1, the concentration is 2 mg / mL, and the temperature is 50 ° C for 4 hours to obtain carbon Nano onion solution;

[0036] (3) Purify and preserve: add water to the carbon nano-onion solution prepared in step (2) and use a rotating speed of 15000 rpm for centrifugal washing, repeat 4 times, the first centrifugation time is 5 minutes, and the last three centrifugation times are 20 minutes; After washing, add water...

Embodiment 2

[0039] The preparation method of this example is the same as that of Example 1, except that the volume ratio of concentrated sulfuric acid to concentrated nitric acid in step (1) is 1:1.

Embodiment 3

[0041] The preparation method of this example is the same as that of Example 1, except that the volume ratio of concentrated sulfuric acid to concentrated nitric acid in step (1) is 3:1.

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Abstract

The invention discloses a preparation method and application of water-dispersible carbon nano onion. According to the preparation method, candle ash is utilized as a raw material, and the candle ash which is not dispersed in water originally is changed into water-dispersible carbon nano-particles through ultrasonic treatment in strong-oxidation acid solution. The carbon nano onion has higher photo-thermal conversion efficiency, also has the advantages of good biocompatibility, good stability, simple preparation, low cost and the like, and can be applied to the field of photo-thermal treatment of tumors and the like. Meanwhile, as carboxyl is on the surface of the carbon nano onion, the carbon nano onion can be modified by molecules with amino; thus, a multifunctional photo-thermal reagent based on the carbon nano onion can be constructed.

Description

technical field [0001] The invention belongs to the field of nanomaterials, and in particular relates to a preparation method of a carbon nano-onion with good water dispersibility and high photothermal conversion rate and its application in photothermal treatment of tumors. Background technique [0002] In 2012, there were about 8 million cancer-related deaths worldwide, and 14 million new cancer patients. At present, the main treatment methods for cancer include surgery, radiotherapy and chemotherapy. However, surgical treatment cannot completely remove cancer cells, and radiotherapy and chemotherapy will cause serious side effects during the treatment process. Photothermal therapy is an emerging cancer treatment method, which has the advantages of less side effects and strong ability to remove tumors. The basic principle of photothermal treatment of tumors is: most biological tissues have weak absorption of near-infrared light with a wavelength of 700-1100nm, while photot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/18B82Y30/00B82Y40/00A61K41/00A61K49/22A61K47/52A61K47/04
CPCA61K41/0052A61K47/02A61K49/222B82Y30/00B82Y40/00C01P2002/84C01P2004/03C01P2004/04C01P2004/62C01P2004/64
Inventor 吴富根孙炜张晓东
Owner SOUTHEAST UNIV
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