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Method for one-step synthesis of fluorescent carbon nano-particle solution

A technology of carbon nanoparticles and fluorescence, applied in nanotechnology, chemical instruments and methods, luminescent materials, etc., can solve the problems of low fluorescence performance of carbon nanoparticles, inability to use biological markers, environmental pollution, etc., to achieve low cost, Satisfy industrial application, good water solubility

Inactive Publication Date: 2015-05-06
SHENYANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The equipment requirements for laser ablation and electrochemical method to prepare nanomaterials are relatively high, and the reaction time of concentrated acid oxidation method generally takes more than ten hours, which has the disadvantages of environmental pollution, equipment corrosion, and long time
Most of the carbon nanoparticles prepared by traditional methods have low fluorescence performance and cannot be used for biological labeling. Further passivation modification is required to have better fluorescence

Method used

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  • Method for one-step synthesis of fluorescent carbon nano-particle solution
  • Method for one-step synthesis of fluorescent carbon nano-particle solution
  • Method for one-step synthesis of fluorescent carbon nano-particle solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Dissolution of materials: Weigh 0.5 grams of citric acid and 0.1 grams of ammonium oxalate and mix them, grind them finely in a mortar, pour the finely ground mixture into a beaker, add 20 ml of ethylene glycol, put it into a magnet, and place it under a magnetic force Stir on a blender until the solid is completely dissolved to obtain a colorless transparent solution.

[0020] (2) Generation of fluorescent carbon nanoparticles: Pour the above solution into a reaction kettle lined with Teflon, tighten the lid of the reaction kettle, place it in a constant temperature drying oven at 170°C for 3 hours, and then take it out of the constant temperature drying oven The reaction kettle is naturally cooled to room temperature, the solution in the kettle is brownish yellow, and the obtained liquid is a fluorescent carbon nanoparticle solution.

[0021] The carbon nanoparticle solution in this example was diluted and characterized by fluorescence and ultraviolet spectroscopy...

Embodiment 2

[0023] (1) Dissolution of materials: Weigh 0.5 g of glucose and 0.05 g of ammonium oxalate and mix them, grind them in a mortar, pour the grinded mixture into a beaker, add 20 ml of ethylene glycol, put in a magnet, and place in a magnetic stirrer Stir until the solid is completely dissolved, and the resulting liquid is a fluorescent carbon nanoparticle solution.

[0024] (2) Generation of fluorescent carbon nanoparticles: Pour the above solution into a reaction kettle lined with Teflon, tighten the lid of the reaction kettle, place it in a constant temperature drying oven and heat at 140°C for 3 hours, and then take it out of the constant temperature drying oven The reaction kettle is naturally cooled to room temperature, the solution in the kettle is brownish yellow, and the obtained liquid is a fluorescent carbon nanoparticle solution.

[0025] The carbon nanoparticles in this example were characterized by XRD, as shown in Figure 4: a broad peak appears at 2θ=20°, which is ...

Embodiment 3

[0027] (1) Dissolution of materials: Weigh 0.5 g of tartaric acid and 0.2 g of ammonium oxalate and mix them, grind them finely in a mortar, pour the finely ground mixture into a beaker, add 20 ml of ethylene glycol, put in a magnet, and place in a magnetic stirrer Stir until the solid is completely dissolved, and the resulting liquid is a fluorescent carbon nanoparticle solution.

[0028] (2) Generation of fluorescent carbon nanoparticles: Pour the above solution into a reaction kettle lined with Teflon, tighten the lid of the reaction kettle, place it in a constant temperature drying oven at 180°C for 3 hours, and then take it out of the constant temperature drying oven The reaction kettle is naturally cooled to room temperature, the solution in the kettle is brownish yellow, and the obtained liquid is a fluorescent carbon nanoparticle solution.

[0029] Fluorescent characterization was performed on the diluted carbon nanoparticle solution in this example. See image 3 , i...

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Abstract

The invention discloses a method for one-step synthesis of a fluorescent carbon nano-particle solution, relating to a method for synthesizing a carbon particle solution. According to the method, glycol is used as a solvent and ammonium oxalate and saccharide or organic acid are used as a carbon source to synthesize fluorescent carbon nano-particles through co-heating, and more than two types of carbon source substances are used during synthesis. The method comprises the following steps of: firstly, comminuting ammonium oxalate and carbon source raw materials, and dissolving the raw materials in glycol to prepare a solution; then transferring the solution into a reaction kettle, heating the reaction kettle in a constant temperature box, and reacting to generate the carbon nano-particle solution, wherein the obtained solution has fluorescence and is a fluorescent carbon nano-particle solution. The raw materials used in the method are easy to obtain, the method is simple, less equipment is needed, reagents are cheap, the synthesis speed is high, strong acid and strong alkali are not used, and the obtained carbon nano-particles are nontoxic and can be conveniently used for biological markers. The carbon nano-particle solution synthesized by the method does not need passivation and separation, has a good fluorescent characteristic and can be directly used.

Description

technical field [0001] The invention relates to a method for synthesizing a carbon particle solution, in particular to a method for synthesizing a fluorescent carbon nanoparticle solution in one step. Background technique [0002] Carbon nanoparticles (CNPs) are a new type of fluorescent nanomaterials with high chemical stability, photostability and special optical properties, which are widely used in sensing, imaging, solar energy, optoelectronic devices and other fields. CNPs have similar fluorescence properties to quantum dots, such as strong and stable fluorescence, adjustable excitation and emission wavelengths, up-conversion performance, and excellent fluorescence emission in the visible region. Compared with other fluorescent nanoparticles, fluorescent carbon nanoparticles have the advantages of good water solubility, biocompatibility and easy surface functionalization due to the abundant oxygen element on their surface. Fluorescent carbon nanoparticles have broa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65B82Y40/00
Inventor 李洪仁李锋李永波刘军王立男
Owner SHENYANG UNIV
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