Preparation of chicken feather nitrogen-doped carbon quantum dots and fluorescent probe and paraquat detection method

The technology of carbon quantum dots and fluorescent probes is applied in the field of preparation of chicken feather nitrogen-doped carbon quantum dots solutions and fluorescent probe solutions, and can solve the problems of potential safety hazards, unfriendly environment, unfavorable sustainable industrial production and the like, Achieve the effect of no hidden danger of toxicity, high sensitivity and low cost

Active Publication Date: 2020-08-25
SICHUAN AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing carbon quantum dot preparation method and the detection method for paraquat are not ideal. On the one hand, there are problems such as unfriendly to the environment and potential safety hazards. On the other hand, it is not conducive to sustainable and convenient large-scale production. Industrial production, it is necessary to improve

Method used

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  • Preparation of chicken feather nitrogen-doped carbon quantum dots and fluorescent probe and paraquat detection method
  • Preparation of chicken feather nitrogen-doped carbon quantum dots and fluorescent probe and paraquat detection method
  • Preparation of chicken feather nitrogen-doped carbon quantum dots and fluorescent probe and paraquat detection method

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Effect test

Embodiment 1

[0040] A preparation method of chicken feather nitrogen-doped carbon quantum dots, said method comprising the steps of:

[0041] (1) Mix the destemmed fluff part of chicken feathers and deionized water according to the mass volume ratio of 0.2g : 60mL, and then add 0.2mL ammonia water as a dopant to the solution, and then ultrasonically disperse the solution for 2 minutes to obtain uniformly dispersed The solution to be reacted;

[0042] (2) Put the solution to be reacted obtained in step (1) in a closed reaction kettle, and react at a temperature of 100°C for 48 hours to obtain a hydrothermal reaction product solution, which is taken out after natural cooling;

[0043] (3) Centrifuge the hydrothermal reaction product solution obtained in step (2) at a speed of 10,000 rpm for 10 minutes, take the supernatant of the brownish-yellow liquid after centrifugation, and pass the supernatant through a 0.22 μm microporous water filter membrane Filter and remove large particles of impu...

Embodiment 2

[0045] A preparation method of chicken feather nitrogen-doped carbon quantum dots, said method comprising the steps of:

[0046] (1) Mix the destemmed fluff part of chicken feathers and deionized water according to the mass volume ratio of 1.0g : 60mL, and then add 1.5 mL ethylenediamine solution into the solution as a dopant, and then ultrasonically disperse the solution for 5 minutes to obtain Uniformly dispersed solution to be reacted;

[0047] (2) Put the solution to be reacted obtained in step (1) in a closed reaction kettle, and react at a temperature of 150°C for 24 hours to obtain a hydrothermal reaction product solution, which is taken out after natural cooling;

[0048] (3) Centrifuge the hydrothermal reaction product solution obtained in step (2) at a speed of 8000 rpm for 20 min, take the supernatant of the centrifuged brownish-yellow liquid, and filter the supernatant through a 0.22 μm microporous water system Membrane filtration removes large particles of impuriti...

Embodiment 3

[0050] A preparation method of chicken feather nitrogen-doped carbon quantum dots, said method comprising the steps of:

[0051] (1) Mix the destemmed fluff part of chicken feathers and deionized water according to the mass volume ratio of 1.5g : 60mL, and then add 3mL lysine solution into the solution as a dopant, and then ultrasonically disperse the solution for 10min to obtain a uniform Dispersed solution to be reacted;

[0052] (2) Put the solution to be reacted obtained in step (1) in a closed reaction kettle, and react at a temperature of 300°C for 1.5 hours to obtain a hydrothermal reaction product solution, which is taken out after natural cooling;

[0053] (3) Centrifuge the hydrothermal reaction product solution obtained in step (2) at a speed of 5000 rpm for 30 min, take the supernatant of the brownish-yellow liquid after centrifugation, and filter the supernatant through a 0.22 μm microporous water system Membrane filtration removes large particles of impurities t...

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Abstract

The invention relates to preparation of chicken feather nitrogen-doped carbon quantum dots and a fluorescent probe and a paraquat detection method. The method comprises the following steps of: uniformly mixing a chicken feather material and deionized water according to a mass-volume ratio of (0.2-1.5)g: 60mL; adding 0.2 mL-3 mL of a nitrogen-containing solution into the solution to serve as a doping agent, conducting ultrasonic dispersion for 2 min-10 min so as to obtain a to-be-reacted solution; putting the to-be-reacted solution into a closed reaction kettle, performing a reaction for 1.5-48hours at the temperature of 100-300 DEG C to obtain a hydrothermal reaction product solution, naturally cooling the solution, and taking out the solution; centrifuging the solution, taking the supernatant of a centrifuged brown yellow liquid, and filtering the supernatant to obtain a chicken feather nitrogen-doped carbon quantum dot solution. A corresponding fluorescent probe is obtained throughthe chicken feather nitrogen-doped carbon quantum dot solution; the excitation wavelength and emission wavelength are explored, a linear regression equation is fitted through a standard solution, anddetection is completed through the equation. The environment-friendly waste biomass material is used as the raw material, the biomass atom doped fluorescent carbon quantum dots are prepared through the one-step hydrothermal method; and paraquat content can be detected through a provided ''switch'' type N-CQDs / Hg <2+> fluorescent probe solution.

Description

technical field [0001] The invention relates to pesticide residue detection technology, in particular to a method for preparing chicken feather nitrogen-doped carbon quantum dot solution and fluorescent probe solution and a method for detecting paraquat. Background technique [0002] As a non-selective, fast-acting herbicide, paraquat has been widely used in more than 130 countries. Due to its high toxicity, it is easily absorbed by the digestive tract, respiratory tract and skin, causing organ damage and even death, posing a serious risk to human health and the environment. [0003] At present, many methods for PQ detection have been reported, such as spectrophotometry, liquid chromatography, thin-layer chromatography and mass spectrometry, but they have limitations such as time-consuming operation, high cost of instrument materials, and difficult pre-treatment, and have not been obtained. Better and wider popularization and application. [0004] Carbon quantum dots, due ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15C09K11/65G01N21/64
CPCC09K11/65C01B32/15G01N21/643G01N2021/6432
Inventor 何利董蕾钱玟陈燕华刘书亮陈姝娟刘爱平
Owner SICHUAN AGRI UNIV
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