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Fused carbon dots and preparation method and application thereof

A technology of carbon dots and fusion, applied in chemical instruments and methods, drug combinations, pharmaceutical formulations, etc., can solve the problems of unstable structure and optical properties, weak interaction, etc., and achieve stable structure and optical properties, low price, good The effect of applying the foreground

Active Publication Date: 2021-09-17
UNIVERSITY OF MACAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods for preparing and assembling carbon dots have weak interparticle interactions, leading to instability in their structural and optical properties.

Method used

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  • Fused carbon dots and preparation method and application thereof
  • Fused carbon dots and preparation method and application thereof
  • Fused carbon dots and preparation method and application thereof

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preparation example Construction

[0031] The present invention provides a method for preparing fused carbon dots, which comprises the following steps: preparing raw carbon dots, and then placing the raw carbon dots in a polar aprotic organic solvent for solvothermal reaction to form fused carbon dots. The reaction temperature of the solvothermal reaction is 200-260°C.

[0032] The surface of the raw carbon dots has active sites, and the active sites include one or more of hydroxyl, carboxyl and amino groups; the particle size of the raw carbon dots is 1 to 8 nm; the raw carbon dots are organic compounds containing hydroxyl or carboxyl groups. Or the black solid prepared by the microwave method of amino acid and urea; the microwave power is 550-650W, the reaction time is 5-10 minutes, and the solvent for preparing the raw material carbon dots is water.

[0033] The above-mentioned polar aprotic organic solvent is selected from N,N-dimethylformamide, formamide or acetone; the dosage ratio of the raw material car...

Embodiment 1

[0058] This embodiment provides a method for preparing fused carbon dots. First, raw carbon dots are prepared, and then a solvothermal reaction is performed with the raw carbon dots to form fused carbon dots.

[0059] The preparation of raw carbon dots includes: dissolving 1 g of citric acid and 1 g of urea in 10 mL of water to obtain a transparent solution, placing it in a microwave oven, and reacting at 650 W for 10 minutes, and obtaining black solids after the reaction, namely raw carbon dots (r-CDs).

[0060] The above-mentioned raw material carbon dots were dissolved in N,N-dimethylformamide according to the consumption of 1g: 15mL, the obtained N,N-dimethylformamide solution was placed in a 30ml polytetrafluoroethylene autoclave, heated The reaction was carried out at a reaction temperature of 220° C. and a reaction time of 2 hours. The heating method was oven heating. The solution after the reaction was added with 60 mL of ethanol, centrifuged, and freeze-dried to obtain...

Embodiment 2

[0062] This embodiment provides a method for preparing fused carbon dots. First, raw carbon dots are prepared, and then a solvothermal reaction is performed with the raw carbon dots to form fused carbon dots.

[0063] The preparation of raw carbon dots includes: dissolving 1 g of citric acid and 1 g of urea in 10 mL of water to obtain a transparent solution, placing it in a microwave oven, and reacting at 650 W for 10 minutes, and obtaining black solids after the reaction, namely raw carbon dots.

[0064] The above-mentioned raw material carbon dots were dissolved in acetone according to the consumption of 1g: 15mL, and the obtained acetone solution was placed in a 30ml polytetrafluoroethylene autoclave, and the reaction was heated. The reaction temperature was 220 ° C, and the reaction time was 2 hours. For heating in an oven, 60 mL of ethanol was added to the reacted solution, centrifuged, and freeze-dried to obtain a black solid powder that is fused carbon dots.

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Abstract

The invention discloses fused carbon dots and a preparation method and application thereof, and relates to the technical field of carbon nanomaterials. The preparation method of the fused carbon dots comprises the following steps: preparing raw material carbon dots, and then placing the raw material carbon dots in a polar aprotic organic solvent for solvothermal reaction to form the fused carbon dots. The small-size raw material carbon dots are prepared by adopting a microwave method, the microwave method has the characteristics of short time consumption, non-toxic solvent and low energy consumption, and the prepared raw material carbon dots have rich surface groups. The fused carbon dot has an enhanced near-infrared emission center, and also has excellent photothermal conversion performance and stable structure and optical properties. The preparation method of the fused carbon dots is simple and easy to implement, low in price and easy for large-scale batch preparation, and has a good application prospect in the fields of photo-thermal conversion materials, photo-thermal therapy, fluorescence imaging and the like.

Description

technical field [0001] The invention relates to the technical field of carbon nanomaterials, in particular to a fusion carbon point, a preparation method and an application thereof. Background technique [0002] Tumor photothermal therapy has the technical advantages of minimally invasive, high efficiency, and low adverse reactions, and tumor photothermal therapy can inhibit tumor metastasis. In theory, it can effectively treat tumors including radiotherapy and chemotherapy failure and drug resistance. The basis of photothermal therapy is to obtain water-soluble nanomaterials with high photothermal conversion efficiency. However, the chemical composition toxicity of nanomaterials itself, or the structural biological toxicity brought by the larger size (>100 nm) is the main obstacle hindering its clinical application. Therefore, it is of great significance to develop novel nanomaterials with small size (<100 nm), non-toxicity, and high photothermal conversion efficienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65B82Y30/00B82Y20/00A61K49/00A61K41/00A61P35/00A61P35/04A61K47/04
CPCC09K11/65B82Y20/00B82Y30/00A61K49/0019A61K41/0052A61P35/00A61P35/04A61K47/02
Inventor 曲松楠吴君汤子康
Owner UNIVERSITY OF MACAU
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