Method for ultrasonically synthesizing hyperfluorescent carbon spots, and applications of hyperfluorescent carbon spots

A technology of fluorescent carbon dots and ultrasonic synthesis, which is applied in chemical instruments and methods, luminescent materials, and analysis by making materials undergo chemical reactions, can solve problems such as unsuitable for wide application, harsh synthesis conditions, and complicated preparation processes, and achieve Easy to promote, mild preparation conditions, good water solubility

Inactive Publication Date: 2014-12-24
DINGTAI HUIBEI BIOCHEM INSTR MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The former extracts carbon dots from activated carbon through five steps of chemical oxidation, evaporation, neutralization, centrifugation, and ultrafiltration, which have good fluorescence properties and electrochemiluminescent activity. However, the preparation process of this method is complicated and the synthesis conditions are harsh. There are dangerous steps such as heating concentrated nitric acid solution, so it is not suitable for wide application
The latter uses abundant and cheap plant ash as a carbon source, and synthesizes carbon dots with good water solubility, stable luminescence, and good biocompatibility by one-step hydrothermal synthesis. This method overcomes the complexity of the former preparation process. However, it still needs to heat the strong acid solution, which is more dangerous

Method used

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  • Method for ultrasonically synthesizing hyperfluorescent carbon spots, and applications of hyperfluorescent carbon spots
  • Method for ultrasonically synthesizing hyperfluorescent carbon spots, and applications of hyperfluorescent carbon spots
  • Method for ultrasonically synthesizing hyperfluorescent carbon spots, and applications of hyperfluorescent carbon spots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Prepare a mixed solution with 1 mol / L glucose as a carbon source, and perform ultrasonic treatment on the mixed solution for 2 hours in an environment with a pH of 1;

[0022] (2) Add 1 mol / L methanol to the mixed solution obtained in step (1), and aging for 6 hours under the catalysis of a concentration of 0.05 mol / L magnesium chloride to obtain a strong fluorescent carbon dot aqueous solution. Its fluorescence has the unique properties of carbon dots, and the emission spectrum changes with the wavelength of the excitation light. figure 1 .

[0023] Using the prepared carbon dots as peroxidase, the hydrogen peroxide solution containing 3,3',5,5'-tetramethylbenzidine was successfully developed, and hydrogen peroxide and glucose were detected.

Embodiment 2

[0025] (1) Prepare a mixed solution with 3mol / L glucose as a carbon source, and perform ultrasonic treatment on the mixed solution for 5 hours in an environment with a pH of 11;

[0026] (2) Add 1 mol / L glycerin to the mixed solution obtained in step (1), and aging for 12 hours under the catalysis of a concentration of 100 mmol / L silver nitrate to obtain a strong fluorescent carbon dot aqueous solution. Through the characteristic absorption peak of carbon dot at 280nm in the ultraviolet-visible absorption spectrum and the transmission electron microscope image, refer to figure 2 with image 3 , Proved that the method produced carbon dots.

[0027] Using the prepared carbon dots as peroxidase, the hydrogen peroxide solution containing 3,3',5,5'-tetramethylbenzidine was successfully developed, and hydrogen peroxide and glucose were detected.

Embodiment 3

[0029] (1) Prepare a mixed solution with 5mol / L glucose as a carbon source, and perform ultrasonic treatment on the mixed solution for 3 hours in an environment with a pH of 7;

[0030] (2) Add 2 mol / L ethanol to the mixed solution obtained in step (1), and aging for 24 hours under the catalysis of a concentration of 0.5 mol / L magnesium sulfate to obtain a strong fluorescent carbon dot aqueous solution.

[0031] Using the prepared carbon dots as peroxidase, the hydrogen peroxide solution containing 3,3',5,5'-tetramethylbenzidine was successfully developed, and hydrogen peroxide and glucose were detected. Refer to the UV absorption spectrum Figure 4 .

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Abstract

The invention discloses a method for ultrasonically synthesizing hyperfluorescent carbon spots, and applications of the hyperfluorescent carbon spots, belonging to the field of nano-luminescence materials. The method comprises the following steps: (1) preparing a mixed solution by taking 0.1-5mol / L glucose as a carbon source, performing ultrasonic treatment to the mixed solution for 0.5-5h under the environment of pH ranging from 1 to 14; and (2) adding 0.1-5mol / L alcohol or amino acid into the mixed solution obtained in the step (1) as a modifier, and aging for 1-48h under the catalytic action of an inorganic salt catalyst, to obtain a hyperfluorescent carbon spots water solution. The method is simple to operate, pollution-free and mass production is easy to conduct.

Description

Technical field [0001] The invention belongs to the field of nano luminescent materials, and specifically relates to a strong fluorescent carbon dot synthesized by an ultrasonic method and its application. Background technique [0002] Carbon dots are a kind of dispersed spherical fluorescent carbon nanoparticles with a size of less than 10nm. They have excellent optical properties, good biocompatibility, low toxicity, low cost and easy availability. They are widely used in biomarkers and optoelectronics. Devices, biological sensing, biological testing, environmental testing and catalysis and other fields. [0003] At present, there are two main methods for synthesizing carbon dots. One is the synthesis method from top to bottom, that is, using arc discharge, laser, and electrochemistry to obtain directly from bulk carbon materials or carbon nanotubes; the other is from the bottom The above synthetic methods are obtained from organic substances through microwave treatment, chemica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C01B31/02G01N21/78
Inventor 宋功武储涛朱晶晶何瑜田甜
Owner DINGTAI HUIBEI BIOCHEM INSTR MFG
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