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Method for preparing carbon-based nanoparticles, carbon-based nanoparticles and application of carbon-based nanoparticles

A technology of carbon-based nanoparticles and particles, which is applied in nano-carbon, nanotechnology, nanotechnology, etc., can solve the problems of complex operation methods, poor stability, and low fluorescence efficiency of carbon-based nanoparticles, and achieve simple process, mild conditions, and good The effect of acid-base stability

Inactive Publication Date: 2018-03-30
CHANGCHUN UNIV OF CHINESE MEDICINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the methods for synthesizing carbon-based nanoparticles mainly include laser ablation, pyrolysis, electrolytic oxidation, etc., but these methods generally require professional equipment, complicated operation methods, and the prepared carbon-based nanoparticles have low fluorescence efficiency, Poor stability and other issues

Method used

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  • Method for preparing carbon-based nanoparticles, carbon-based nanoparticles and application of carbon-based nanoparticles
  • Method for preparing carbon-based nanoparticles, carbon-based nanoparticles and application of carbon-based nanoparticles
  • Method for preparing carbon-based nanoparticles, carbon-based nanoparticles and application of carbon-based nanoparticles

Examples

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preparation example Construction

[0028] In the first aspect, the present invention provides a method for preparing carbon-based nanoparticles. Using leaves of deciduous trees as a carbon source, fluorescent carbon-based nanoparticles with good water solubility are prepared through low-temperature carbonization and oxidation treatment. During the carbonization process, the cellulose and protein molecules in the leaves are pyrolyzed, their own structure is destroyed and carbon deposits are formed. The carbon-deposited sample is oxidized in an oxidant, and the agglomerated particles are decomposed to form independent carbon-based nanoparticles, which are then dispersed in an aqueous solution. Specifically, the preparation method of the carbon-based nanoparticles of the present invention comprises the following steps:

[0029] (1) Carbonize the leaves of deciduous trees to obtain carbon sources

[0030] Deciduous trees are trees that lose all their leaves in autumn and winter or in dry seasons, generally referri...

Embodiment 1

[0053] Wash the fallen leaves of white birch with deionized water, remove the petioles and keep only the leaves. The blades were placed in a tube furnace, and the temperature was raised from room temperature to 400 °C at a rate of 1 °C / min under a slowly flowing nitrogen atmosphere, and then cooled naturally to room temperature after a constant temperature of 400 °C for 3 hours. Take 1 g of carbonized fallen leaves and place them in a round bottom flask, add 100 mL of 5 mol / L nitric acid and stir at room temperature for 6 hours. The obtained solution was centrifuged, and the collected black precipitate was added with 5 mol / L nitric acid and stirred at room temperature for 6 hours, the obtained solution was centrifuged again, and the supernatants obtained by the two centrifuges were combined. Then the supernatant was filtered with slow quantitative filter paper, and the obtained filtrate was dried by rotary evaporation, and the obtained sample was labeled as Def-CNPs-1.

Embodiment 2

[0055] The method adopted in Example 2 is the same as that in Example 1, except that the fallen leaves of weeping willow are used as raw materials, and the finally obtained sample is marked as Def-CNPs-2.

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Abstract

The invention provides a method for preparing carbon-based nanoparticles. The method comprises the steps of: (1) carbonizing leaves of a deciduous tree to obtain a carbon source; (2) adding an oxidizing agent into the carbon source so as to perform an oxidation reaction, and then performing centrifugal separation to obtain a supernatant; (3) filtering the supernatant, and collecting the filtrate;and (4) drying the filtrate to obtain the carbon-based nanoparticles. The invention also provides the carbon-based nanoparticles prepared by the method and application of the carbon-based nanoparticles in biological analysis.

Description

technical field [0001] The invention belongs to the field of nanomaterials, in particular, the invention relates to a preparation method of carbon-based nanoparticles, carbon-based nanoparticles prepared by the method and applications of the carbon-based nanoparticles. Background technique [0002] The discovery of carbon-based nanomaterials with fluorescent properties has brought new hope for the synthesis of new fluorescent materials for biomedicine. Because carbon-based nanomaterials have high chemical inertness, good biocompatibility, and low cytotoxicity, they are very likely to become a substitute for metal element-based fluorescent quantum dots in the biomedical field. [0003] At present, the methods for synthesizing carbon-based nanoparticles mainly include laser ablation, pyrolysis, electrolytic oxidation, etc., but these methods generally require professional equipment, complicated operation methods, and the prepared carbon-based nanoparticles have low fluorescenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15C09K11/65G01N21/64G01N33/58
CPCB82Y30/00B82Y40/00C09K11/65G01N21/64G01N33/582
Inventor 修洋赵幻希孙秀丽万茜淋李雪苗瑞刘淑莹
Owner CHANGCHUN UNIV OF CHINESE MEDICINE
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