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Preparation and application of spirulina carbon quantum dot

A technology of spirulina carbon quantum and carbon quantum dots, which can be used in nano-carbon, measuring devices, chemical instruments and methods, etc., can solve problems such as toxicity and environmental hazards, and achieve simple process, convenient preparation and good biocompatibility. Effect

Active Publication Date: 2020-10-13
HEXI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon quantum dots are generally extracted from a mixture of lead, cadmium, and silicon, but these quantum dots are generally toxic and have great harm to the environment

Method used

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  • Preparation and application of spirulina carbon quantum dot
  • Preparation and application of spirulina carbon quantum dot
  • Preparation and application of spirulina carbon quantum dot

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Take a 100mL beaker, pour 4.00g of spirulina powder, 4.0mL of ammonia water, and 36.0mL of deionized water into the beaker, and stir magnetically for 30 minutes;

[0032] (2) Pour the uniformly stirred solution in (1) into a 100mL hydrothermal reactor, put the reactor into a 160°C oven and heat it for 5 hours. After the reaction, take out the hydrothermal reactor and cool it to room temperature;

[0033] (3) Take out the solution cooled to room temperature in the reaction kettle in (2), and vacuum filter it with a Buchner funnel;

[0034] (4) Heat and disinfect the prepared dialysis bag in boiling water for 20 minutes;

[0035] (5) Take the solution obtained by Buchner funnel suction filtration in (3), put it into the above-mentioned dialysis bag, place it in a beaker filled with 500mL deionized water and dialyze for 48h to obtain the spirulina carbon quantum dot solution, measured at an excitation wavelength of 365nm , when the emission wavelength is 430nm, the fl...

Embodiment 2

[0038] (1) Take a 100mL beaker, pour 4.00g of spirulina powder, 4.0mL of ammonia water, and 36.0mL of deionized water into the beaker, and stir magnetically for 30 minutes;

[0039] (2) Pour the uniformly stirred solution in (1) into a 100mL hydrothermal reaction kettle, and put the reaction kettle into a 180°C oven to heat and react for 5 hours. After the reaction is completed, the hydrothermal reactor is taken out and cooled to room temperature;

[0040] (3) Take out the solution cooled to room temperature in the reaction kettle in (2), and vacuum filter it with a Buchner funnel;

[0041] (4) Heat and disinfect the prepared dialysis bag in boiling water for 20 minutes;

[0042] (5) Take the solution obtained by Buchner funnel suction filtration in (3), put it into the above-mentioned dialysis bag, place it in a beaker filled with 500mL deionized water and dialyze for 48h to obtain the spirulina carbon quantum dot solution, measured at an excitation wavelength of 365nm , wh...

Embodiment 3

[0045] (1) Take a 100mL beaker, pour 4.00g of spirulina powder, 4.0mL of ammonia water, and 36.0mL of deionized water into the beaker, and stir magnetically for 30 minutes;

[0046] (2) Pour the uniformly stirred solution in (1) into a 100mL hydrothermal reactor, put the reactor into a 200-degree oven and heat it for 5 hours. After the reaction, take out the hydrothermal reactor and cool it to room temperature;

[0047] (3) Take out the solution cooled to room temperature in the reaction kettle in (2), and vacuum filter it with a Buchner funnel;

[0048] (4) Heat and disinfect the prepared dialysis bag in boiling water for 20 minutes;

[0049] (5) Take the solution obtained by Buchner funnel suction filtration in (3), put it into the above-mentioned dialysis bag, place it in a beaker filled with 500mL deionized water and dialyze for 48h to obtain the spirulina carbon quantum dot solution, measured at an excitation wavelength of 365nm , when the emission wavelength is 450nm, t...

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Abstract

The invention discloses a preparation method of a spirulina carbon quantum dot. The preparation method comprises the following steps: mixing spirulina, ammonia water and deionized water, and carryingout uniform stirring; subjecting the uniformly stirred solution to reacting at 160-240 DEG C for 2-7 hours, carrying out cooling to room temperature, and then performing filtering to obtain a filtrate; dialyzing the filtrate by using a dialysis bag to obtain a spirulina carbon quantum dot solution; freeze drying the spirulina carbon quantum dot solution to obtain the spirulina carbon quantum dot.According to the invention, the spirulina carbon quantum dots are prepared from a natural product precursor, namely spirulina; preparation process is simple; and the carbon quantum dot is single and uniform in particle size, good in water solubility and dispersity, free of toxic action, good in biocompatibility, stable in fluorescence signal, free of light flickering, high in fluorescence intensity, capable of being used for specifically and selectively recognizing Pb<2+> in a water solution, and high in sensitivity.

Description

technical field [0001] The invention belongs to the technical field of fluorescent material preparation and ion detection, and relates to a preparation method of spirulina carbon quantum dots; the invention also relates to the application of the spirulina carbon quantum dots in fluorescent recognition aqueous solution for lead ions. Background technique [0002] Carbon quantum dots are a kind of spherical semiconducting carbon nanomaterials with a size below 10 nanometers. Carbon quantum dots not only have luminescent properties and small size characteristics similar to traditional quantum dots, but also have the advantages of good water solubility, low biological toxicity and good electrical conductivity, making them widely used in biological imaging, biomarkers, sensors, photocatalysis, luminescence Areas such as diodes have received great attention. [0003] At present, the photoelectric conversion efficiency of traditional quantum dots is still very low, and most of the...

Claims

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Application Information

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IPC IPC(8): C09K11/65C01B32/15B82Y20/00B82Y40/00G01N21/64
CPCC09K11/65B82Y20/00B82Y40/00G01N21/643C01B32/15G01N2021/6432C01P2004/04
Inventor 李守博安小燕刘彩云
Owner HEXI UNIV