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A kind of amphiphilic graphene quantum dot and its preparation method and application

A graphene quantum dot, amphiphilic technology, applied in the direction of graphene, single-layer graphene, application, etc., can solve the problems of complex methods, limited application scope of graphene quantum dots, etc., and achieves narrow particle size distribution and excellent shape. Appearance control effect, high quality effect

Active Publication Date: 2021-01-26
东营慧达科技创业服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there are only a few reports on amphiphilic graphene quantum dots, all of which use further amphiphilic modification of existing graphene quantum dots. The method is complicated, and as a particle-type surfactant, it can only form Oil-in-water forward emulsion system
The above problems greatly limit the application range of graphene quantum dots

Method used

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  • A kind of amphiphilic graphene quantum dot and its preparation method and application
  • A kind of amphiphilic graphene quantum dot and its preparation method and application
  • A kind of amphiphilic graphene quantum dot and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1. Hydrothermal synthesis of amphiphilic graphene quantum dots

[0053] After hydrothermally reacting a mixed aqueous solution of 1,3,6-trinitropyrene, sodium laurate and sodium hydroxide for a certain period of time, the obtained solution is dialyzed and purified, and then further freeze-dried to obtain an amphiphilic graphene quantum dot solid. Among them, the concentration of 1,3,6-trinitropyrene is 2.0 mg / mL, the concentration of sodium laurate is 10.0 mg / mL, the concentration of sodium hydroxide is 5.0 mg / mL, the hydrothermal reaction temperature is 200 ° C, water The thermal reaction time is 10h. The reaction product was fully dialyzed through a dialysis bag with a molecular weight cut-off of 1000Da, and amphiphilic graphene quantum dots were collected.

[0054] 2. Characterization

[0055] The amphiphilic graphene quantum dots in Example 1 were tested and characterized by ultraviolet light irradiation, atomic force microscope, transmission electron microscope, ...

Embodiment 2

[0073] 1. Hydrothermal synthesis of amphiphilic graphene quantum dots

[0074] After a hydrothermal reaction of a mixed aqueous solution of 1,3,6-trinitropyrene, mercaptoundecanoic acid, and sodium carbonate for a certain period of time, the resulting solution was purified by dialysis and further freeze-dried to obtain an amphiphilic graphene quantum dot solid . Among them, the concentration of 1,3,6-trinitropyrene is 3.0mg / mL, the concentration of mercaptoundecanoic acid is 8.0mg / mL, the concentration of sodium carbonate is 10.0mg / mL, and the hydrothermal reaction temperature is 180°C. The hydrothermal reaction time is 6h. The reaction product was fully dialyzed through a dialysis bag with a molecular weight cut-off of 1000Da, and amphiphilic graphene quantum dots were collected.

[0075] 2. Characterization and detection

[0076] The amphiphilic graphene quantum dots in specific example 2 were tested and characterized by ultraviolet light irradiation, atomic force microsc...

Embodiment 3

[0078] 1. Hydrothermal synthesis of amphiphilic graphene quantum dots

[0079] The mixed aqueous solution of 1,3,6-trinitropyrene, tetradecanoic acid and sodium phosphate is hydrothermally reacted for a certain period of time, and the obtained solution is purified by dialysis and further freeze-dried to obtain the amphiphilic graphene quantum dot solid. Among them, the concentration of 1,3,6-trinitropyrene is 2.0mg / mL, the concentration of myristic acid is 6.0mg / mL, the concentration of sodium phosphate is 10.0mg / mL, the temperature of hydrothermal reaction is 180℃, water The thermal reaction time is 8h. The reaction product was fully dialyzed through a dialysis bag with a molecular weight cut-off of 1000Da, and amphiphilic graphene quantum dots were collected.

[0080] 2. Characterization and detection

[0081] The amphiphilic graphene quantum dots in specific example 3 were tested and characterized by ultraviolet light irradiation, atomic force microscope, transmission ele...

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Abstract

The invention discloses an amphiphilic graphene quantum dot and its preparation method and application, belonging to the technical field of new materials. The preparation method includes: dissolving a carbon source compound, a compound capable of introducing a hydrophilic group, and a compound capable of introducing a hydrophobic group in a solvent to obtain a mixed liquid, and synthesizing amphiphilic graphene quantum dots from bottom to top; The carbon source compound is 1,3,6-trinitropyrene, and the compound capable of introducing a hydrophilic group is a compound containing one or more of amino, amide, carboxyl, mercapto and hydroxyl groups. The compound that can introduce hydrophobic groups is a compound containing alkane group, alkene group or aromatic hydrocarbon group with carbon number ≥ 6, amino group, amide group, carboxyl group, mercapto group, sulfonic acid group or hydroxyl group. The one-step method for preparing amphiphilic graphene quantum dots in the present invention is simple and easy to operate, and the amphiphilic graphene quantum dots with excellent synthesis performance can form a stable water-in-oil reversed phase in a two-phase system that is incompatible with water. Emulsion system.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to an amphiphilic graphene quantum dot and its preparation method and application. Background technique [0002] Graphene quantum dots (GQDs) integrate the quantum confinement effect, size effect and boundary effect, and also have the advantages of good biocompatibility, excellent luminescence performance and adjustable band gap. It has potential application prospects in many fields such as anti-counterfeiting, life imaging, chemical and biological sensing. [0003] However, most of the graphene quantum dots synthesized in the prior art are hydrophilic graphene quantum dots or lipophilic graphene quantum dots, which can only be dissolved in a single solvent and do not have surface and interface effects. Amphiphilic graphene quantum dots have both hydrophilic groups and lipophilic groups, have certain solubility in polar and non-polar solvents, and have unique surface and inte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65B82Y20/00B82Y40/00B01F17/00C08F112/08C08F2/44C09D11/52C01B32/184C09K23/00
CPCC09D11/52C09K11/65B82Y20/00B82Y40/00C08F2/44C08F112/08C01B2204/32C01B2204/02C09K23/002
Inventor 奚凤娜宣玲俐陈鹏刘吉洋
Owner 东营慧达科技创业服务有限公司
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