Carbon quantum dot with fluorescence property, and preparation method and applications thereof

A technology of carbon quantum dots and fluorescence, which is applied in the field of carbon nanomaterial preparation and chemical detection, can solve the problems of low sensitivity of heavy metal ions, poor adsorption selectivity, etc., achieve high fluorescence intensity, simple and easy detection process, and the source of raw materials wide range of effects

Active Publication Date: 2017-04-26
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the research status at home and abroad, pure carbon dots currently have shortcomings such as low sensitivity and poor adsorption selectivity for the detection of heavy metal ions.

Method used

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  • Carbon quantum dot with fluorescence property, and preparation method and applications thereof
  • Carbon quantum dot with fluorescence property, and preparation method and applications thereof
  • Carbon quantum dot with fluorescence property, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of carbon quantum dot solution with fluorescent properties: After washing and drying the chrysanthemum, weigh 1g of chrysanthemum and 30mL of distilled water and add it to a 50mL reaction kettle with a polytetrafluoroethylene liner, and react at 180°C for 24h. After cooling to room temperature, the obtained brown-black product was centrifuged, and the collected solution part was filtered with a microporous membrane to obtain a yellow solution that was carbon quantum dots with fluorescent properties.

[0021] Test carbon quantum dots as fluorescent probes for the detection of metal ions: the prepared carbon quantum dots emit blue fluorescence under the irradiation of a 365nm ultraviolet lamp, the best fluorescence excitation peak is at 453nm, and the best fluorescence emission peak is at the setting of the fluorescence spectrometer The excitation wavelength is 516nm ( figure 1 ). For the selectivity experiment of carbon quantum dots on metal ions, 3mL of car...

Embodiment 2

[0033] After washing and drying the chrysanthemum, weigh 1g of chrysanthemum and 30mL of distilled water and add it to a 50mL reaction kettle with a polytetrafluoroethylene liner, react at 160°C for 24h, cool to room temperature after the reaction, and centrifuge the obtained brown-black product After separation and collection of the solution part, the yellow solution obtained after filtering with a microporous membrane is carbon quantum dots with fluorescent properties.

[0034] Test carbon quantum dots as fluorescent probes for the detection of metal ions: the prepared carbon quantum dots emit blue fluorescence under the irradiation of a 365nm ultraviolet lamp, and use fluorescence spectroscopy to measure the fluorescence properties of carbon quantum dots and the selectivity experiment for metal ions .

[0035] The effect of pH on the fluorescence intensity of carbon quantum dots: adjust the pH of the prepared carbon quantum dots to 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 with...

Embodiment 3

[0037] After washing and drying the chrysanthemum, weigh 1g of chrysanthemum and 30mL of distilled water into a 50mL reaction kettle with a polytetrafluoroethylene liner, react at 190°C for 12h, cool to room temperature after the reaction, and centrifuge the obtained brown-black product After separation and collection of the solution part, the yellow solution obtained after filtering with a microporous membrane is carbon quantum dots with fluorescent properties.

[0038] Test carbon quantum dots as fluorescent probes for the detection of metal ions: the prepared carbon quantum dots emit blue fluorescence under the irradiation of a 365nm ultraviolet lamp, and use fluorescence spectroscopy to measure the fluorescence properties of carbon quantum dots and the selectivity experiment for metal ions .

[0039] The effect of pH on the fluorescence intensity of carbon quantum dots: adjust the pH of the prepared carbon quantum dots to 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 with the prep...

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Abstract

The invention provides a carbon quantum dot with a fluorescence property, and a preparation method and applications thereof. According to the preparation method, chrysanthemums are steamed, washed, and dried, then chrysanthemums are place in a baking oven to carry out reactions for 16 to 48 hours at a temperature of 150 to 220 DEG C, after reactions, the baking oven is cooled to the room temperature, the obtained brownish black product is subjected to centrifugation; the collected solution is filtered by a filter membrane, and after filtration, the obtained yellow or brown solution is the carbon quantum dots with a fluorescence property. The carbon quantum dot preparation technology is simple, the raw materials are easily available, the cost is low, and the carbon quantum dot can be used as a mark free fluorescent probe and can be used to detect the pH and trivalent iron high selectively and high sensitively.

Description

technical field [0001] The invention belongs to the technical field of carbon nanomaterial preparation and chemical detection, and in particular relates to a carbon quantum dot with fluorescent properties, a preparation method and application thereof. Background technique [0002] As a new type of fluorescent material, carbon quantum dots have the advantages of good photostability, high water solubility, and good biocompatibility. Carbon quantum dots with low toxicity have begun to replace semiconductor quantum dots with high biological toxicity and are used in biochemical analysis and detection, biological imaging, drug carriers and other life science fields. They are the most promising fluorescent nanomaterials for disease detection. According to the research status at home and abroad, the detection of pure carbon dots to heavy metal ions currently has shortcomings such as low sensitivity and poor adsorption selectivity. In addition, most industrial wastewater is acidic, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C01B32/15G01N21/64B82Y40/00
CPCB82Y40/00C09K11/0883C09K11/65G01N21/643
Inventor 李守海许利娜李梅黄坤丁海阳夏建陵杨小华张燕
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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