Fluorescent carbon point, and preparation method and application thereof
A technology of fluorescent carbon dots and fluorescent probes, which is applied in the field of fluorescence detection, can solve problems such as damage, corrosion of industrial facilities and mechanical equipment, and achieve the effects of low price, high value utilization, and easy large-scale production
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Embodiment 1
[0020] Preparation of fluorescent carbon dots: Weigh 0.1 g of gallic acid and 30 mL of absolute ethanol into a 50 mL reaction kettle with a polytetrafluoroethylene liner, react at 180 °C for 12 h, cool to room temperature after the reaction, The obtained solution was filtered with a microporous membrane (0.22 µm), and the obtained brown liquid was freeze-dried to obtain carbon dots.
[0021] Application of carbon dots in the detection of water content in ethanol: uniformly disperse the prepared carbon dots into absolute ethanol, add 3 mL of carbon dot solution and a series of distilled water of different volumes into a 5 mL fluorescence cuvette, mix Uniform, so that the final water content in the solution is 0-10% (v / v), the fluorescence properties of each solution are measured by a fluorescence spectrometer, and the obtained fluorescence spectrum is obtained.
[0022] Total phenolic content of carbon dots: The total phenolic content of carbon dots was detected by the Folin-Ci...
Embodiment 2
[0025] Preparation of fluorescent carbon dots: Weigh 0.1 g of gallic acid and 30 mL of absolute ethanol into a 50 mL reaction kettle with a polytetrafluoroethylene liner, react at 180 °C for 24 h, cool to room temperature after the reaction, The obtained solution was filtered with a microporous membrane, and the obtained brown liquid was freeze-dried to obtain carbon dots.
[0026] Application of carbon dots in the detection of water content in ethanol: uniformly disperse the prepared carbon dots into absolute ethanol, add 3 mL of carbon dot solution and a series of distilled water of different volumes into a 5 mL fluorescence cuvette, mix Uniform, make the final water content in the solution be 0-10% (v / v), utilize the fluorescence spectrometer to measure the fluorescence property of each solution, the fluorescence spectrogram that obtains ( figure 2 ).
[0027] Total phenolic content of carbon dots: The total phenolic content of carbon dots was detected by the Folin-Ciocal...
Embodiment 3
[0030] Preparation of fluorescent carbon dots: Weigh 0.1 g of gallic acid and 30 mL of absolute ethanol into a 50 mL reaction kettle with a polytetrafluoroethylene liner, react at 160 °C for 12 h, cool to room temperature after the reaction, The obtained solution was filtered with a microporous membrane, and the obtained brown liquid was freeze-dried to obtain carbon dots.
[0031] Application of carbon dots in the detection of water content in ethanol: uniformly disperse the prepared carbon dots into absolute ethanol, add 3 mL of carbon dot solution and a series of distilled water of different volumes into a 5 mL fluorescence cuvette, mix Uniform, so that the final water content in the solution is 0-10% (v / v), the fluorescence properties of each solution are measured by a fluorescence spectrometer, and the obtained fluorescence spectrum is obtained.
[0032] Total phenolic content of carbon dots: The total phenolic content of carbon dots was detected by the Folin-Ciocalteu (F...
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