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Preparation method and application of silicon-carbon quantum dots

A silicon-carbon quantum and content technology, which is applied in chemical instruments and methods, measuring devices, nanotechnology for materials and surface science, etc., can solve the problems of time-consuming and complicated detection process, and achieve strong blue fluorescence, quantum The effect of high yield and strong photostability

Active Publication Date: 2022-02-11
HEBEI UNIVERSITY
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Problems solved by technology

It has the advantages of automatic operation and reliable analysis results, but the detection process is complicated, time-consuming and requires large-scale equipment and professionals

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  • Preparation method and application of silicon-carbon quantum dots
  • Preparation method and application of silicon-carbon quantum dots
  • Preparation method and application of silicon-carbon quantum dots

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Embodiment Construction

[0027] The present invention has synthesized SiCDs using specific materials and specific processes, and the prepared SiCDs can be synthesized by Fe 3+ Specific quenching, and restored by Vc, so the present invention uses SiCDs and Fe 3+ To detect the Vc content in food.

[0028] 1. Synthesis of SiCDs

[0029] In the present invention, SiCDs are synthesized by a one-step hydrothermal method. Specifically: 0.8 g of citric acid and 0.2 g of cysteine ​​were dissolved in 8 mL of deionized water, ultrasonically dissolved for 15 min, and nitrogen gas was bubbled for 10 min to remove oxygen. Then 2 mL of 3-aminopropyltriethoxysilane (APTES) was injected into the nitrogen-saturated precursor solution. Subsequently, the prepared SiCDs precursor solution was transferred into a 25 mL polytetrafluoroethylene-lined stainless steel autoclave and incubated at 200 °C for 2 h. After cooling to room temperature, the resulting mixture was purified by dialysis bag (100-500 Da) for 24h. Finall...

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Abstract

The invention provides a preparation method and application of silicon-carbon quantum dots. The preparation method of the silicon carbon quantum dots (SiCDs) comprises the following steps: firstly, dissolving citric acid and cysteine in deionized water, carrying out ultrasonic dissolution, and carrying out nitrogen bubbling; injecting 3-aminopropyltriethoxysilane into the nitrogen-saturated precursor solution, transferring the obtained solution into a stainless steel autoclave with a polytetrafluoroethylene lining, and conducting incubation for 2 h at the temperature of 200 DEG C; and after cooling to room temperature, purifying the obtained mixture through a dialysis bag to obtain a SiCDs solution. According to the invention, an off-on fluorescence sensor is ingeniously designed by applying the SiCDs to detect the Vc, the fluorescence of the SiCDs can be quenched by Fe<3+> through IFE and PET, the Vc can recover an energy trap caused by a redox reaction and -NH2 / -OH exposure, and the new strategy based on the off-on of the effective fluorescence can be used for detecting the Vc.

Description

technical field [0001] The invention relates to the technical field of Vc detection, in particular to a preparation method and application of silicon-carbon quantum dots. Background technique [0002] Vitamin C (Vc, also known as ascorbic acid) is a highly water-soluble component that plays an extremely important role in human health. It is important for various biological processes, such as acting as a potent antioxidant and reducing oxidative stress on Vc peroxidase substrates. In clinical practice, Vc can be used to relieve vitiligo and reduce the incidence of cancer. Vc cannot be synthesized in the human body and must be ingested through food, drugs, etc. The intake of Vc is effective for treating the common cold, scurvy, mental illness, diarrhea, cancer, AIDS and infertility. On the contrary, Vc excess can cause some symptoms, such as stomach irritation, diarrhea and urinary tract stones. Considering the important role of Vc in our daily life, monitoring and testing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65B82Y20/00B82Y30/00B82Y40/00G01N21/64
CPCC09K11/65B82Y20/00B82Y30/00B82Y40/00G01N21/643
Inventor 李春花徐啸王富丽师钰博赵昕王庭欣赵志磊
Owner HEBEI UNIVERSITY
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