Method for preparing carbon quantum dots by using conjugated polymer and application

A technology of conjugated polymers and carbon quantum dots, which is applied in the fields of nanotechnology, nanocarbon and nanotechnology for materials and surface science, can solve the problem of difficult to prepare carbon quantum dots in large quantities, and achieves water-solubility and high quality. Non-toxic, clear structure, good water solubility

Active Publication Date: 2013-01-30
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Carbon quantum dots have broad application prospects in biomarkers, fluorescent sensing, and photothermal therapy for cancer, but these methods are difficult to realize the macro volume preparation

Method used

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  • Method for preparing carbon quantum dots by using conjugated polymer and application
  • Method for preparing carbon quantum dots by using conjugated polymer and application
  • Method for preparing carbon quantum dots by using conjugated polymer and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of method utilizing conjugated polymer to prepare carbon quantum dot, comprises the following steps:

[0046]1) Put 10mg of polymer PT1 solid powdery conjugated polymer into a beaker, add 40mL of 0.5M sodium hydroxide aqueous solution, and mix well;

[0047] 2) Transfer the uniformly mixed reaction liquid into a hydrothermal reaction kettle, control the reaction temperature at 250°C, and the reaction time is 12 hours;

[0048] 3) Naturally cool to 30° C. after the reaction, collect the reaction solution, separate and purify to obtain blue fluorescent carbon quantum dots.

Embodiment 2

[0050] A kind of method utilizing conjugated polymer to prepare carbon quantum dot, comprises the following steps:

[0051] 1) Put 10 mg of polymer PT2 solid powdery conjugated polymer into a beaker, add 10 mL of water with a concentration of 1M potassium hydroxide aqueous solution, and mix well;

[0052] 2) Transfer the uniformly mixed reaction liquid into a microwave reactor, control the reaction temperature at 130° C., and the reaction time is 3 hours;

[0053] 3) Naturally cool to 25° C. after the reaction, collect the reaction solution, separate and purify to obtain yellow fluorescent carbon quantum dots.

Embodiment 3

[0055] A kind of method utilizing conjugated polymer to prepare carbon quantum dot, comprises the following steps:

[0056] 1) Put 20mg of polymer PT3 solid powdered conjugated polymer into a beaker, add 40mL of 0.1M hydrochloric acid aqueous solution, and mix well;

[0057] 2) transfer the uniformly mixed reaction liquid into a hydrothermal reaction kettle, control the reaction temperature at 150°C, and the reaction time is 5 hours;

[0058] 3) Naturally cool to 15° C. after the reaction, collect the reaction solution, separate and purify to obtain green fluorescent carbon quantum dots.

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Abstract

The invention discloses a method for preparing carbon quantum dots by using a conjugated polymer, which is characterized in that an aqueous solution with 0-1M of acid or alkali possessing the mass of 0.01-1000 times of conjugated polymer is added in the conjugated polymer, and uniformly mixing to obtain a reaction liquid; the uniformly mixed reaction liquid is placed in a reactor, reacted for 1-24 hours under the temperature of 100-500 DEG C; cooled to the room temperature after the reaction, the reaction liquid is collected, separated and purified to obtain the carbon quantum dots. The carbon quantum dots have the advantage of low cost, realization of macro quantity preparation, good water solubility and no toxicity, and are an inorganic nonmetal nano material having great application prospect in the fields of biological labeling, fluorescent sensing, cancer treating by photothermy.

Description

technical field [0001] The invention relates to a preparation method and application of carbon quantum dots, in particular to a method for preparing carbon quantum dots by using a conjugated polymer and its application. Background technique [0002] The element carbon is the basis of all known life on Earth. Due to its diverse electron orbital characteristics (sp 1 , sp 2 , sp 3 ), so many substances with peculiar structures and properties can be formed. Carbon quantum dots have the characteristics of adjustable luminescence, high fluorescence quantum efficiency, good photobleaching resistance, good biocompatibility, non-toxicity, easy functionalization, and high yield preparation. Carbon quantum dots are expected to be used in optoelectronic devices, nanocatalysts, Bioanalysis, fluorescence imaging, and photothermal therapy for cancer have broad application prospects [Angew.Chem.Int.Ed, 2010, 49, 6726-6244; Chem.Comm.2012, 48.3686-3705]. [0003] At present, there are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y30/00C01B32/15
Inventor 汪鹏飞蓝敏焕葛介超刘卫敏张洪艳吴加胜
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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