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A kind of nitrogen-doped graphene quantum dot and its preparation and application of detecting hydrogen peroxide

A technology of graphene quantum dots and nitrogen doping, which is applied in the direction of graphene, single-layer graphene, and analysis through chemical reactions of materials, which can solve complex and harsh synthesis steps and other problems, and achieve simple operation and low cost , the effect of strong anodic electrochemiluminescent properties

Active Publication Date: 2022-08-09
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods often require complex and demanding synthetic steps

Method used

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  • A kind of nitrogen-doped graphene quantum dot and its preparation and application of detecting hydrogen peroxide
  • A kind of nitrogen-doped graphene quantum dot and its preparation and application of detecting hydrogen peroxide
  • A kind of nitrogen-doped graphene quantum dot and its preparation and application of detecting hydrogen peroxide

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Embodiment 1

[0059] 1. Hydrothermal synthesis of nitrogen-doped graphene quantum dots

[0060] After hydrothermal synthesis in a mixed aqueous solution of 1,3-dinitronaphthalene, luminol and sodium hydroxide for a certain period of time, the obtained solution was purified by dialysis and further freeze-dried to obtain nitrogen-doped graphene quantum dot solids. Among them, the concentration of 1,3-dinitronaphthalene was 0.5 mg / mL, the concentration of luminol was 0.05 mg / mL, the concentration of sodium hydroxide was 0.1 mol / L, the hydrothermal reaction temperature was 200 °C, and the hydrothermal reaction The time is 10h. After the reaction product was fully dialyzed through a dialysis bag with a molecular weight cut-off of 500 Da, the solution in the dialysis bag was fully dialyzed through a dialysis bag with a molecular weight cut-off of 3500 Da, and the solution outside the dialysis bag was the nitrogen-doped graphene quantum dot solution.

[0061] 2. Characterization and detection

...

Embodiment 2

[0075] 1. Hydrothermal synthesis of nitrogen-doped graphene quantum dots

[0076]After hydrothermal synthesis in a mixed aqueous solution of 1,3-dinitronaphthalene, luminol and sodium hydroxide for a certain period of time, the obtained solution was purified by dialysis and further freeze-dried to obtain nitrogen-doped graphene quantum dot solids. Among them, the concentration of 1,3-dinitronaphthalene was 1.0 mg / mL, the concentration of luminol was 0.08 mg / mL, the concentration of sodium hydroxide was 0.1 mol / L, the hydrothermal reaction temperature was 180 °C, and the hydrothermal reaction The time is 6h. After the reaction product was fully dialyzed through a dialysis bag with a molecular weight cut-off of 500 Da, the solution in the dialysis bag was fully dialyzed through a dialysis bag with a molecular weight cut-off of 3500 Da, and the solution outside the dialysis bag was the nitrogen-doped graphene quantum dot solution.

[0077] 2. Characterization and detection

[0...

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Abstract

The invention discloses a nitrogen-doped graphene quantum dot and its application in preparation and detection of hydrogen peroxide, belonging to the field of new materials. The method for preparing nitrogen-doped graphene quantum dots includes: hydrothermally reacting 1,3-dinitronaphthalene and luminol under alkaline conditions to prepare nitrogen-doped graphene quantum dots. The method for preparing nitrogen-doped graphene quantum dots provided by the invention has high yield and simple operation. The nitrogen-doped graphene quantum dots prepared by the invention have anode electrochemiluminescence performance in the presence of hydrogen peroxide, and the initial luminescence potential of the anode electrochemiluminescence is significantly lower than that of the existing anode ECL probes; Compared with Mino, the nitrogen-doped graphene quantum dots of the present invention can have high ECL properties under relatively low alkaline conditions, and can have high ECL strength with small dose doping, and have the advantage of low cost. Therefore, it can be applied to the highly sensitive electrochemiluminescence detection of hydrogen peroxide.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a nitrogen-doped graphene quantum dot with anode electrochemiluminescence, a preparation method thereof, and an application in electrochemiluminescence detection of hydrogen peroxide. Background technique [0002] Electrochemiluminescence or electrochemiluminescence (ECL) is a process in which electrochemical substances form excited-state luminescence through electron transfer reactions. Common ECL reagents include 9,10-diphenylanthracene, lucigenin, ruthenium bipyridine, and grass peroxide. acid esters, luminol and quantum dots, etc. As an ingenious combination of chemiluminescence and electrochemistry, ECL has the advantages of simple instrument, convenient operation, no background light signal, high sensitivity, and good controllability (for example, the reaction can be controlled by applying an external potential on the electrode), etc., and is currently the most effective. One ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184G01N21/76
CPCC01B32/184G01N21/76C01B2204/20C01B2204/32C01B2204/02
Inventor 奚凤娜邓小春郑琰艳朱珊珊晏菲
Owner ZHEJIANG SCI-TECH UNIV
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