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Preparation method of fluorine-doped silicon quantum dots and application of fluorine-doped silicon quantum dots in detection of carmine

A technology of silicon quantum dots and fluorine doping, applied in the field of preparation of fluorine-doped silicon quantum dots, can solve the problems of low sensitivity, long running time, long sample preprocessing time, etc.

Inactive Publication Date: 2022-03-22
郑州中科生物医学工程技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The methods for detecting carmine include chromatographic analysis, colorimetry, electrochemical methods, etc. However, these methods have certain disadvantages, such as long sample pretreatment time, expensive reagents, long running time, and low sensitivity

Method used

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  • Preparation method of fluorine-doped silicon quantum dots and application of fluorine-doped silicon quantum dots in detection of carmine
  • Preparation method of fluorine-doped silicon quantum dots and application of fluorine-doped silicon quantum dots in detection of carmine
  • Preparation method of fluorine-doped silicon quantum dots and application of fluorine-doped silicon quantum dots in detection of carmine

Examples

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Embodiment 1

[0024] The preparation method of the fluorine-doped silicon quantum dots of this embodiment comprises the following steps:

[0025] (1) Weigh 0.3g of levofloxacin into 10ml of ultrapure water, ultrasonically treat until completely dissolved, add 0.1ml of 3-aminopropyltriethoxysilane (APTES), mix well and place in a 100ml polytetrafluoroethylene reaction kettle Reaction at 200°C for 8h.

[0026] (2) The reaction solution obtained in step (1) was cooled to room temperature, dialyzed in water for 48 hours using a dialysis bag (1000 Da), and finally obtained a solid product by freeze-drying.

Embodiment 2

[0028] The difference between the preparation method of fluorine-doped silicon quantum dots in this example and Example 1 is that:

[0029] In step (1), the consumption of levofloxacin is 0.1 g, and the consumption of APTES is 1 ml. The temperature of the hydrothermal reaction is 180°C, and the time is 7h.

Embodiment 3

[0031] The difference between the preparation method of fluorine-doped silicon quantum dots in this example and Example 1 is that:

[0032] In step (1), the consumption of levofloxacin is 2g, and the consumption of APTES is 2ml. The temperature of the hydrothermal reaction is 180°C, and the time is 9h.

[0033] 2. For specific examples of the application of the above-mentioned fluorine-doped silicon quantum dots, please refer to the following experimental examples for details.

[0034] 3. Experimental example

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Abstract

The invention belongs to the field of silicon quantum dots, and particularly relates to a preparation method of a fluorine-doped silicon quantum dot and application of the fluorine-doped silicon quantum dot in detection of carmine. The method comprises the following steps: carrying out a hydrothermal reaction on 3-aminopropyltriethoxysilane and levofloxacin in water at 180-220 DEG C, carrying out dialysis treatment on the obtained reaction liquid, and drying to obtain the fluorine-doped silicon quantum dots, the use amount of the levofloxacin corresponding to each 0.1 to 2 mL of the 3-aminopropyltriethoxysilane is 0.1 to 2 g. According to the preparation method of the fluorine-doped silicon quantum dot, the obtained blue fluorescence emission silicon quantum dot is high in luminous intensity, has a specific fluorescence quenching characteristic on carmine, and can realize the specificity and sensitivity detection of the carmine.

Description

technical field [0001] The invention belongs to the field of silicon quantum dots, and in particular relates to a preparation method of fluorine-doped silicon quantum dots and an application in detecting carmine. Background technique [0002] Carmine is a commonly used synthetic food coloring, belonging to strong acid dyes. Excessive carmine has been proven to have serious carcinogenic and mutagenic effects, and the United States, Canada, Denmark, Norway, and many other countries have banned the use of carmine in any food. It is permitted as an additive in many countries and has strict usage levels in certain foods such as beverages, candies and pickles. In China, the use of carmine in the food industry is limited to frozen drinks, jams, beverages, candies, cakes, syrups, preserves and cans. To ensure the health of consumers, it is essential to establish a simple, rapid, sensitive and accurate method for the effective detection of carmine in food. [0003] The methods for...

Claims

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Application Information

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IPC IPC(8): C09K11/61B82Y20/00B82Y40/00G01N21/64
CPCC09K11/617B82Y20/00B82Y40/00G01N21/643G01N2021/6432Y02A50/30
Inventor 昝明辉董文飞柳裕禄宋明轩安帅吴再辉刘莹贾明正王东
Owner 郑州中科生物医学工程技术研究院