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Macroscopic preparation method for high yield carbon quantum dot

A carbon quantum dot, high-yield technology, applied in the field of high-yield carbon quantum dot preparation, can solve the problems of complex raw material pretreatment process, low carbon quantum dot yield, cumbersome process steps, etc., and achieve convenient large-scale production , high yield and quantum yield, wide-ranging effects

Inactive Publication Date: 2019-01-15
张宏伟
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Problems solved by technology

[0003] The synthesis of carbon quantum dots can adopt top-down methods, such as laser exfoliation of graphite method, electrochemical oxidation method, arc discharge method, high temperature pyrolysis method, etc., but the carbon quantum dots prepared by these methods generally require surface passivation. Treatment operations, and the process steps are cumbersome and costly; bottom-up methods can also be used, such as carbohydrate concentrated sulfuric acid dehydration method, hydrothermal synthesis method, etc., but some of these methods require complicated raw material pretreatment processes, The yield of some carbon quantum dots is low

Method used

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  • Macroscopic preparation method for high yield carbon quantum dot

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Embodiment 1

[0009] Dissolve 10 grams of 2-aminoterephthalic acid in 1000 milliliters of water at room temperature, then transfer to an autoclave and heat to 180 o C, keep warm for 12 hours; after cooling to room temperature, dialyze the reaction solution with a dialysis bag with a molecular weight cut-off of 500D for 48 hours, and change the water every 12 hours; o C was freeze-dried to powder to obtain carbon quantum dots, which emitted bright blue fluorescence under 365nm ultraviolet light irradiation.

Embodiment 2

[0011] Dissolve 4 grams of 2-aminoterephthalic acid and 0.58 grams of ethylenediamine in 400 milliliters of water at room temperature, then transfer to an autoclave and heat to 180 o C, keep warm for 18 hours; after cooling to room temperature, dialyze the reaction solution with a dialysis bag with a molecular weight cut-off of 500D for 48 hours, and change the water every 12 hours; o C was lyophilized to powder to obtain carbon quantum dots, which emitted strong blue fluorescence under 365nm ultraviolet light irradiation.

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Abstract

The invention discloses a macroscopic preparation method for high yield carbon quantum dot. The method includes: putting a reaction substrate and a dopant into a solvent together, carrying out reaction at 130-250DEG C for 0.5-50h, and then conducting dialysis, rotary evaporation, freeze-drying and other steps to obtain carbon quantum dot powder. The method provided by the invention has the characteristics of easy operation, easily controllable reaction conditions, and high carbon quantum dot yield, and is suitable for large-scale production. The prepared carbon quantum dot can be used for biolabeling, cell fluorescence imaging, photoelectric devices, heavy metal ion detection, catalytic degradation of pollutants, biosensors and other fields.

Description

technical field [0001] The invention relates to the fields of chemistry and nanometer material science, in particular to a method for preparing high-yield carbon quantum dots. Background technique [0002] Carbon quantum dots are zero-dimensional nanoparticles with small particle size, good fluorescence properties, wide excitation wavelength range, excellent biocompatibility, good water solubility and easy functionalization of the surface. It can be used in the fields of biomarkers, cell fluorescence imaging, photoelectric devices, heavy metal ion detection, catalytic degradation of pollutants and biosensors, so it has attracted the attention of researchers. [0003] The synthesis of carbon quantum dots can adopt top-down methods, such as laser exfoliation of graphite method, electrochemical oxidation method, arc discharge method, high temperature pyrolysis method, etc., but carbon quantum dots prepared by these methods generally require surface passivation. Treatment opera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65B82Y20/00B82Y30/00
CPCB82Y20/00B82Y30/00C09K11/65
Inventor 张宏伟
Owner 张宏伟
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