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Carbon quantum dots in starch-based food and detection method and application of carbon quantum dots

A carbon quantum dot and detection method technology, which is applied in the field of nanotechnology and food safety detection, can solve the toxicity of animal cells and viscera, and achieve the effects of fast and efficient detection, simple sample preparation, and convenient promotion

Inactive Publication Date: 2017-04-26
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, experiments have confirmed that large-size and high-concentration carbon quantum dots are toxic to animal cells and internal organs

Method used

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  • Carbon quantum dots in starch-based food and detection method and application of carbon quantum dots
  • Carbon quantum dots in starch-based food and detection method and application of carbon quantum dots
  • Carbon quantum dots in starch-based food and detection method and application of carbon quantum dots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The detection method of carbon quantum dots in starchy foods in this embodiment specifically includes the following steps:

[0039] 1. Prepare experimental samples by using bread cores: take 10g of fresh bread cores, put them in an oven, place them at 60°C for 24 hours, and then grind them into powder;

[0040] 2. Weigh 1g of the powder made from the bread core, dissolve it in 40ml of deionized water, and ultrasonicate for 2-4 hours to obtain a suspension;

[0041] 3. Centrifuge the above solution at a speed of 5000-8000r / min, and take the upper clear solution as the solution to be tested;

[0042] 4. Carry out the following tests on the solution to be tested: place it under a UV lamp for irradiation; perform a steady-state fluorescence spectrum test; perform a UV-visible absorption spectrum test; perform an X-ray photoelectron spectrum test; perform a high-magnification transmission electron microscope observation ; Perform cyclic voltammetry test.

[0043] (1) Irrad...

Embodiment 2

[0050] The detection method of carbon quantum dots in starchy foods in this embodiment specifically includes the following steps:

[0051] 1. Prepare experimental samples with bread crusts: take 10g of fresh bread crusts, put them in an oven, place them at 60°C for 24 hours, and then grind them into powder;

[0052] 2. Weigh 1g of the raw material made from the bread crust, dissolve it in 40ml of deionized water, and ultrasonicate for 2-4 hours to obtain a suspension;

[0053] 3. Centrifuge the above solution at a speed of 5000-8000r / min, and take the upper clear solution as the solution to be tested;

[0054] 4. Carry out the following tests on the solution to be tested: place it under a UV lamp for irradiation; perform a steady-state fluorescence spectrum test; perform a UV-visible absorption spectrum test; perform an X-ray photoelectron spectrum test; perform a high-magnification transmission electron microscope observation ; Perform cyclic voltammetry test.

[0055] (1) ...

Embodiment 3

[0062] In this example, the application of carbon quantum dots obtained in starchy foods to quantum dot-sensitized solar cells (taking bread core as an example) specifically includes the following steps:

[0063] 1. The titanium dioxide colloid was prepared by the sol-hydrothermal method, and the titanium dioxide colloid was coated on the FTO conductive glass substrate, and the mesoporous titanium dioxide film was prepared by calcination at 400-500 °C;

[0064] 2. Soak the titanium dioxide film prepared in step 1 in the solution extracted from the bread core and detected to contain carbon quantum dots for 20 to 30 hours; make the photoanode of the quantum dot solar cell;

[0065] 3. Preparation of platinum counter electrode by pyrolysis method;

[0066] 4. Combine the photoanode prepared in step 2 with the platinum counter electrode prepared in step 3, and add a liquid electrolyte in the middle to assemble a quantum dot-sensitized solar cell.

[0067] The liquid electrolyte c...

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Abstract

The invention provides carbon quantum dots in starch-based food and a detection method and application of the carbon quantum dots. The starch-based food is dried at low temperature, ground into powder, dissolved and separated to obtain clear liquid, and the carbon quantum dots in the starch-based food are accurately detected and evaluated by modes of ultraviolet light irradiation, an ultraviolet-visible light splitting spectrum, steady-state fluorescence spectrum, X-ray photoelectron spectroscopy, cyclic voltammetry, observation by a high-resolution transmission electron microscope and the like. Materials are taken from food materials closely linked to life, the carbon quantum dots which are in the starch-based food and affect health of human bodies are qualitatively and quantitatively detected by a simple and speedy method, the technology is accurate and speedy, a scientific basis is provided for safety detection of food of the human bodies, and the technology has guiding significance on a dietary mode of people. Meanwhile, the carbon quantum dots detected in the food are combined to a quantum dot sensitized solar cells, the cost is low, and pollution does not exist.

Description

technical field [0001] The invention belongs to the field of nanotechnology and food safety detection, and in particular relates to a carbon quantum dot in starchy food and a detection method and application thereof. Background technique [0002] Food safety has always been a hot topic of concern. As one of the three major grains in the world, wheat is a gramineous plant widely grown all over the world. Wheat can be ground into flour to make bread, steamed buns, biscuits, pizza, noodles and other foods. Rice is one of the most important food crops, and more than half of the world's population uses rice as a staple food. Starch foods consumed by humans are made by mixing wheat or rice with water and heating them at high temperatures. Starch contains a variety of carbon chain macromolecules, which are hydrolyzed in a high-temperature environment containing water to generate glucose, and glucose can generate carbon quantum dots in this environment. At present, experiments ha...

Claims

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Application Information

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IPC IPC(8): G01N33/10H01G9/20H01G9/042
CPCG01N33/10H01G9/2004H01G9/2022Y02E10/542
Inventor 唐群委孟园园贺本林张悦
Owner OCEAN UNIV OF CHINA
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