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Boron-doped graphene quantum dot, and preparation method and application thereof

A graphene quantum dot and boron doping technology, applied in the field of fluorescent materials and catalytic properties, can solve the problem of difficult doping of B atoms, and achieve the effects of good fluorescence stability, high stability, and obvious selective recognition ability.

Active Publication Date: 2018-01-16
菏泽市金沃泰化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the difficulty of B atom doping in the prior art, the present invention provides a boron-doped graphene quantum dot with high stability and peroxidase-like catalytic activity that can be prepared in one step through a simple liquid phase reaction.

Method used

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  • Boron-doped graphene quantum dot, and preparation method and application thereof
  • Boron-doped graphene quantum dot, and preparation method and application thereof
  • Boron-doped graphene quantum dot, and preparation method and application thereof

Examples

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Embodiment 1

[0036] 1. Hydrothermal synthesis of boron-doped graphene quantum dots

[0037] The mixed aqueous solution of 1,3,6-trinitropyrene and borax is added into a hydrothermal kettle for hydrothermal reaction synthesis, purified by dialysis, and freeze-dried to obtain the boron-doped graphene quantum dots.

[0038] In this reaction system, the concentration of 1,3,6-trinitropyrene is 2 mg / mL, the concentration of borax is 0.10 mol / L, and the hydrothermal reaction is carried out in a hydrothermal kettle at 200°C for 4 hours. The volume of the hot kettle is 15%; the product dialysis purification method is: after the reaction product is fully dialyzed through a dialysis bag with a molecular weight cut-off of 500Da, the solution outside the dialysis bag is fully dialyzed through a dialysis bag with a molecular weight cut-off of 3500Da to remove unreacted small molecules, The solution in the dialysis bag is the boron-doped graphene quantum dot solution.

[0039] 2. Characterization and d...

Embodiment 2

[0055] 1. Hydrothermal synthesis of boron-doped graphene quantum dots

[0056] The mixed aqueous solution of 1,3,6-trinitropyrene and borax is added into a hydrothermal kettle for hydrothermal reaction synthesis, purified by dialysis, and freeze-dried to obtain the boron-doped graphene quantum dots.

[0057] In this reaction system, the concentration of 1,3,6-trinitropyrene is 1mg / mL, the concentration of borax is 0.15mol / L, and the hydrothermal reaction is carried out in a hydrothermal kettle at 180°C for 10h. The volume of the hot kettle is 20%; the product dialysis purification method is: after the reaction product is fully dialyzed through a dialysis bag with a molecular weight cut-off of 500Da, the solution outside the dialysis bag is fully dialyzed through a dialysis bag with a molecular weight cut-off of 3500Da to remove unreacted small molecules. The solution in the dialysis bag is the boron-doped graphene quantum dot solution.

[0058] 2. Characterization and detecti...

Embodiment 3

[0061] 1. Hydrothermal synthesis of boron-doped graphene quantum dots

[0062] The mixed aqueous solution of 1,3,6-trinitropyrene and borax is added into a hydrothermal kettle for hydrothermal reaction synthesis, purified by dialysis, and freeze-dried to obtain the boron-doped graphene quantum dots.

[0063] In this reaction system, the concentration of 1,3,6-trinitropyrene is 4 mg / mL, the concentration of borax is 0.15 mol / L, and the hydrothermal reaction is carried out in a hydrothermal kettle at 160°C for 9 hours, and the volume of the reaction solution accounts for 1% of water The volume of the hot kettle is 20%; the product dialysis purification method is: after the reaction product is fully dialyzed through a dialysis bag with a molecular weight cut-off of 500Da, the solution outside the dialysis bag is fully dialyzed through a dialysis bag with a molecular weight cut-off of 3500Da to remove unreacted small molecules. The solution in the dialysis bag is the boron-doped g...

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Abstract

The invention discloses a boron-doped graphene quantum dot and a preparation method thereof. The boron element-doped graphene quantum dot is prepared by one-step hydrothermal synthesis in a mixed aqueous solution of 1,3,6-trinitropyrene and borax, and the prepared boron-doped graphene quantum dot can emit yellow fluorescence and has good fluorescence stability, and the fluorescence intensity afterthe boron-doped graphene quantum dot is placed for 3 months still keeps 99% of initial fluorescence intensity. The high-stability boron-doped graphene quantum dot provided by the invention has peroxidase-like reaction activity, and can catalyze a color reaction that hydrogen peroxide oxidizes 3,5,3',5'-tetramethylbenzidine. The boron-doped graphene quantum dot has obvious selective recognition ability on iron ions, and the iron ions can quench fluorescent signals of the boron-doped graphene quantum dot, and corresponding stability is achieved within 3 minutes.

Description

technical field [0001] The invention belongs to the field of fluorescent materials and catalytic properties, and in particular relates to a boron-doped graphene quantum dot and its preparation method and application. Background technique [0002] Graphene quantum dots (GQDs) are quasi-zero-dimensional carbon nanomaterials, whose particle size is generally less than 100nm, and whose thickness is less than 10 layers of graphene. In addition to inheriting graphene's good water solubility, large surface area, and high carrier mobility In addition to many excellent properties, such as good mechanical flexibility and stable optical performance, due to its small size, it also has significant quantum confinement effect and edge effect, thus showing the special photoluminescence performance of fluorescence. This property makes GQDs a potential application prospect in the field of fluorescence sensing. However, the currently synthesized GQDs have problems such as low fluorescence qua...

Claims

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Application Information

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IPC IPC(8): C09K11/65B82Y20/00B82Y30/00B82Y40/00G01N21/64G01N21/78
Inventor 奚凤娜葛淑燕沈超江晓梅黄碧婷
Owner 菏泽市金沃泰化工有限公司
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