Fluorescent carbon quantum dots extracted from eggs and preparation method and application thereof

A technology of carbon quantum dots and fluorescence, which is applied in the field of preparation of fluorescent carbon quantum dots, can solve the problems that limit the large-scale production and practical application of fluorescent carbon quantum dots, expensive raw materials, time-consuming and other problems, and achieve excellent dispersion effect, simple equipment, The effect of stabilizing fluorescence performance

Active Publication Date: 2012-07-18
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods are complex and time-consuming, and most of the raw materials used are relatively expensive, and the products need to undergo strong acid reflux treatment or surface

Method used

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  • Fluorescent carbon quantum dots extracted from eggs and preparation method and application thereof
  • Fluorescent carbon quantum dots extracted from eggs and preparation method and application thereof
  • Fluorescent carbon quantum dots extracted from eggs and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take 1g of fresh egg white in a glass dish (the diameter of the glass dish is 3cm, and the height is 1cm), and place it tightly between the upper and lower electrodes of the low-temperature plasma reactor. Set the voltage to 50V and the current to 2.4A, and the uniform plasma beam generated by the upper electrode acts on the surface of the sample. After 3 minutes of treatment, the plasma reactor was closed, and the glass dish was taken out after the temperature dropped to room temperature, and the black product was taken out, and ground evenly. Disperse the ground sample in pure water, stir it magnetically for 1 hour, place it in an ultrasonic oscillator for 30 minutes, and then centrifuge it at 10,000 rpm for 10 minutes to obtain the supernatant; filter the obtained supernatant with a 30kD ultrafiltration membrane, The filtrate was collected and dried at 50° C. to obtain solid fluorescent carbon quantum dots.

[0039] Weigh 0.01g of the carbon quantum dots into 10g of...

Embodiment 2

[0041] Take 1g of fresh egg yolk in a glass dish (the diameter of the glass dish is 3cm, and the height is 1cm), and place it tightly between the upper and lower electrodes of the low-temperature plasma reactor. Set the voltage to 50V and the current to 2.4A, and the uniform plasma beam generated by the upper electrode acts on the surface of the sample. The plasma reactor was turned off after 3 minutes of treatment. After the temperature dropped to room temperature, take out the glass dish, take out the black product, and grind it evenly. Disperse the ground sample in chloroform, stir it magnetically for 1 hour, place it in an ultrasonic oscillator for 10 minutes, and then centrifuge it at 10,000 rpm for 10 minutes to obtain the supernatant; use a 30kD ultrafiltration membrane to filter the obtained supernatant Filtrate, collect the filtrate, and dry in a ventilated place at room temperature to obtain fluorescent carbon quantum dot solids.

[0042]Weigh 0.01g of the carbon q...

Embodiment 3

[0044] Take 1g of fresh egg white in a glass dish (the diameter of the glass dish is 3cm, and the height is 1cm), and place it tightly between the upper and lower electrodes of the low-temperature plasma reactor. Set the voltage to 60V and the current to 3A, and the uniform plasma beam generated by the upper electrode acts on the surface of the sample. The plasma reactor was turned off after 1 min of treatment. After the temperature dropped to room temperature, take out the glass dish, take out the black product, and grind it evenly. Disperse the ground sample in deionized water, stir it magnetically for 1 hour, place it in an ultrasonic oscillator for 10 minutes, and then centrifuge it at 10,000 rpm for 10 minutes to obtain the supernatant; filter the obtained supernatant with a 30kD ultrafiltration membrane , collect the filtrate, and dry it at 50° C. to obtain fluorescent carbon quantum dot solids.

[0045] Weigh 0.01g of the carbon quantum dots into 10g of pure water, st...

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Abstract

The invention discloses fluorescent carbon quantum dots extracted from eggs. The carbon quantum dots are natural and non-toxic, low in material price, strong in fluorescence-emission spectrum and stable in performance, light-emitting color can be adjusted along with excitation wavelength, and the fluorescence efficiency is high in multiple solutions. The fluorescent carbon quantum dots extracted from the eggs provided in the invention are prepared by the following steps of: a, completely separating fresh egg white and yolk by virtue of an egg white separator and placing the separated egg white and yolk in a refrigerator for cold storage before use; b, placing the separated egg white/yolk in a glass dish and conducting bulk treatment on the separated egg white/yolk directly via a long-temperate plasma to obtain a black solid product; c, dispersing the black solid product in solvent, magnetically stirring and conducting ultrasonic treatment to uniformly disperse the sample; and d, conducting centrifugation on the obtained turbid liquid, removing sediment, separating liquid supernatant by virtue of an ultra-filtration membrane, collecting filtrate and drying to obtain the fluorescentcarbon quantum dots.

Description

technical field [0001] The invention relates to a fluorescent nanometer material, a preparation method and its application, more specifically to a fluorescent carbon quantum dot extracted from eggs, a preparation method and its application. Background technique [0002] Due to their excellent optical and electrical properties, fluorescent nanoparticles have broad application prospects in the fields of biomedicine and optoelectronic devices. Recently, researchers have found that typical fluorescent nanoparticles, such as CdTe, CdSe, PbS and other semiconductor quantum dot materials, contain heavy metal elements, which not only have toxic side effects on organisms, but also cause serious pollution to the environment, which greatly limits the use of such materials. Applications of quantum dots in the fields of biology and environmental protection. [0003] Compared with semiconductor quantum dots, fluorescent carbon quantum dots, which have emerged in recent years, have attrac...

Claims

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Application Information

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IPC IPC(8): C01B31/02C09K11/65C01B32/15
Inventor 陈苏王静王彩凤
Owner NANJING UNIV OF TECH
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