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Method for preparing fluorescent carbon quantum dots by using eggs as precursor through microwave process

A technology of carbon quantum dots and precursors, which is applied in the field of preparing fluorescent carbon quantum dots by microwave method, can solve the problems of low synthesis yield, poor photostability, and weak fluorescence intensity, and achieve good water solubility, simple method, and source wide range of effects

Inactive Publication Date: 2019-05-03
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the disadvantages of low synthetic yield, poor photostability and weak fluorescence intensity of traditional quantum dots, the present invention uses egg white and egg yolk as carbon sources respectively, and adopts a microwave method to prepare carbon quantum dots. This method simplifies the operation process and prepares high-yield Fluorescent carbon dots with high efficiency, strong photostability, good water solubility, and high fluorescence intensity, and systematically study the fluorescence characteristics of this carbon quantum dot

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  • Method for preparing fluorescent carbon quantum dots by using eggs as precursor through microwave process
  • Method for preparing fluorescent carbon quantum dots by using eggs as precursor through microwave process
  • Method for preparing fluorescent carbon quantum dots by using eggs as precursor through microwave process

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Embodiment 1

[0017] Example 1: This embodiment records a method for preparing fluorescent carbon quantum dots using protein as a precursor. The method is a microwave method, and the specific preparation steps are as follows:

[0018] Step 1: Stir 100mL protein solution evenly to obtain a light yellow solution, heat the solution in a 700W microwave oven for 25min, the light yellow solution turns into a dark brown solid, and cool naturally to room temperature;

[0019] Step 2: Grind the black-brown solid, add 500mL deionized water to form a turbid liquid, keep stirring for 48 hours, put the turbid liquid in a centrifuge and centrifuge at a centrifugal rate of 2000-22000r / min, and the centrifugation time is 10-30min. Take the supernatant, and then filter through a microporous membrane with a pore size of 0.22 μm to obtain the supernatant;

[0020] Step 3: using a dialysis bag with a molecular weight cut-off of 3500 Da, dialyzing the clear liquid for 3 to 6 days to obtain a carbon quantum dot ...

Embodiment 2

[0022] Example 2: This embodiment records a method for preparing fluorescent carbon quantum dots using egg yolk as a precursor. The method is a microwave method, and the specific preparation steps are as follows:

[0023] Step 1: Stir 100mL egg yolk solution evenly to obtain a yellow solution, heat the solution in a 700W microwave oven for 25min, the light yellow solution turns into a dark brown solid, and cool naturally to room temperature;

[0024] Step 2: Grind the black-brown solid, add 500mL deionized water to form a turbid liquid, keep stirring for 48 hours, put the turbid liquid in a centrifuge and centrifuge at a centrifugal rate of 2000-22000r / min, the centrifugation time is 10-30min, take The supernatant is filtered through a microporous membrane with a pore size of 0.22 μm to obtain a supernatant;

[0025] Step 3: using a dialysis bag with a molecular weight cut-off of 3500 Da, dialyzing the clear liquid for 3 to 6 days to obtain a carbon quantum dot solution, and f...

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Abstract

A method for preparing fluorescent carbon quantum dots by using eggs as a precursor through a microwave process belongs to the field of fluorescent carbon quantum dot preparation. The method includes:with the natural biological material, eggs, being a carbon source, yolk and egg white are separated by using an egg white separator, then water-soluble fluorescent carbon quantum dots are produced through the microwave process. The method employs accessible raw materials, is low in cost and simple in synthesis steps, can quickly produce the product, is convenient to carry out, can achieve large-scale production, is green and environment-friendly and is free of addition of toxic chemical reagents. Researching results prove that the fluorescent carbon quantum dots have good water solubility andhigh fluorescence intensity, and have great application prospects in the fields of cell imaging, biomarkers, catalytic engineering, biosensors, disease monitoring and prevention, etc.

Description

technical field [0001] The invention belongs to the field of preparation of fluorescent carbon quantum dots, and in particular relates to a method for preparing fluorescent carbon quantum dots by microwave method using eggs as a precursor. Background technique [0002] Carbon constitutes the basic structural unit of living organisms, such as amino acids, polysaccharides, proteins, etc., which shows that carbon has good biocompatibility and biosafety in living organisms. In 2004, Xu et al. accidentally discovered carbon nanoparticles during the process of separating and purifying single-walled carbon nanotubes, and they continued to explore the fluorescent properties of nanoparticles in their later research to try to develop a new fluorescent nanomaterial. In 2006, Sun et al. named this kind of fluorescent carbon nanoparticles as carbon quantum dots (Carbon Dots, CDs) for the first time, and proposed that the fluorescence emission intensity of fluorescent carbon quantum dots ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65B82Y20/00B82Y40/00
Inventor 李炳生余立冬魏新晶贺金梅李丽陈洪宇
Owner HARBIN INST OF TECH