One-step rapid controllable preparation method of full-emission fluorescence carbon quantum dots

A carbon quantum dot, full-emission technology, applied in the field of one-step rapid and controllable preparation of full-emission fluorescent carbon quantum dots, can solve the problems of low fluorescence quantum efficiency, single emission wavelength, uncontrollable preparation, etc., and achieves high fluorescence quantum efficiency. Solve the effect of single emission wavelength, fast response and controllable effect

Active Publication Date: 2018-12-14
SHANXI UNIV
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Problems solved by technology

[0005] In order to solve the problems of the existing fluorescent carbon dots with single emission wavelength, uncontrollable preparation and low fluorescence quantum efficiency of carbon quantum dots, the present invention provides a one-step rapid and controllable preparation method of fully emitting fluorescent carbon quantum dots, the source of raw materials Extensive and cheap ...

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  • One-step rapid controllable preparation method of full-emission fluorescence carbon quantum dots
  • One-step rapid controllable preparation method of full-emission fluorescence carbon quantum dots
  • One-step rapid controllable preparation method of full-emission fluorescence carbon quantum dots

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Embodiment 1

[0018] Embodiment 1: A one-step rapid and controllable preparation method of all-emission fluorescent carbon quantum dots, the steps are as follows:

[0019] (1) Weigh 0.05 g of p-phenylenediamine and 0.05 g of p-aminobenzoic acid, add them into 10 mL of absolute ethanol, and sonicate at 20°C and 40 kHz for 10 min to obtain a uniform and colorless mixed solution;

[0020] (2) Transfer the mixed solution to a 50 mL polytetrafluoroethylene autoclave with a temperature lower than 230 °C, and place it in an oven at 150 °C for 11 h to obtain a black solution. The rotary evaporation condition is: temperature 35 °C , vacuum degree 0.085 MPa, rotation speed 100rpm; rotary evaporation to remove ethanol, dissolve it in secondary water, centrifuge to remove insoluble matter, use 500 Da dialysis bag for dialysis treatment for three days to remove non-luminescent substances, and obtain pure fluorescent carbon quantum dots aqueous solution;

[0021] (3) The above-mentioned fluorescent carb...

Embodiment 2

[0022] Embodiment 2: A one-step rapid and controllable preparation method of all-emission fluorescent carbon quantum dots, the steps are as follows:

[0023] (1) Weigh 0.01 g of m-phenylenediamine and 0.09 g of m-aminobenzoic acid, add them into 8 mL of absolute ethanol, and sonicate at 20°C and 40 kHz for 10 min to obtain a uniform and colorless mixed solution;

[0024] (2) Transfer the mixed solution to a 50 mL polytetrafluoroethylene autoclave with a temperature lower than 230 °C, and place it in an oven at 160 °C for 10 h to obtain a black solution. The controlled rotary evaporation condition is: temperature 35 ℃, vacuum degree 0.085 MPa, rotating speed 100 rpm, remove ethanol by rotary evaporation, dissolve it in secondary water, centrifuge to remove insoluble matter, use 500-1000 Da dialysis bag for three days to remove non-luminescent substances, and obtain pure Fluorescent carbon quantum dot aqueous solution;

[0025] (3) The above-mentioned fluorescent carbon quantum...

Embodiment 3

[0026] Embodiment 3: A one-step rapid and controllable preparation method of all-emission fluorescent carbon quantum dots, the steps are as follows:

[0027] (1) Weigh 0.04 g of o-phenylenediamine and 0.16 g of anthranilic acid respectively, add them into 20 mL of absolute ethanol, and ultrasonically dissolve to obtain a uniform and colorless mixed solution;

[0028] (2) Transfer the mixed solution to a 100 mL polytetrafluoroethylene autoclave with a temperature lower than 230 °C, and place it in an oven at 170 °C for 11 h to obtain a black solution. The controlled rotary evaporation condition is: temperature 35 ℃, vacuum degree 0.085 MPa, rotation speed 100 rpm, rotary evaporation to remove ethanol, dissolve it in secondary water, centrifuge to remove insoluble matter, and use 2000 Da dialysis bag for three days to remove non-luminescent substances, and obtain pure fluorescent carbon Quantum dot aqueous solution;

[0029] (3) After freeze-drying the above-mentioned fluoresce...

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Abstract

The invention belongs to the technical field of a light-emitting nanometer material and provides a one-step rapid controllable preparation method of full-emission fluorescence carbon quantum dots so as to solve the problems that the existing fluorescence carbon dots are single in wavelength and uncontrollable in preparation and the fluorescence quantum efficiency of the carbon quantum dots is low.The method comprises the following steps: modifying any two of amino, carboxyl and hydroxyl on a benzene ring, mixing with absolute ethanol and dissolving ultrasonically and completely to obtain a mixed solution; transferring the mixed solution to a high-pressure reaction kettle and performing high-temperature reaction in a drying oven to obtain a claybank or black solution, namely a full-emission fluorescence carbon quantum dot solution; and flexibly adjusting the type and the proportion of a reaction precursor, the reaction temperature and the reaction time and performing one-step rapid control to obtain the full-emission fluorescence carbon quantum dots. The raw materials are wide in source and low in price, the production equipment is cheap and the universality is high. The prepared full-emission fluorescence carbon quantum dots have high solubility and dispersibility in an aqueous solution and an organic solvent, have high fluorescence quantum efficiency and can be applied to cell marking and imaging.

Description

technical field [0001] The invention belongs to the technical field of luminescent nanomaterials, especially carbon quantum dots, and specifically relates to a one-step rapid and controllable preparation method of full emission fluorescent carbon quantum dots. Background technique [0002] Discovered in 2004 and named in 2006, carbon quantum dots, as an emerging member of the carbon nano family, have shown great promise in the fields of fluorescent probes, biomarkers, biosensing, optoelectronic devices, drug delivery, immunotherapy, and photocatalysis. Broad application prospects. Carbon quantum dots have excellent characteristics, such as: wide and cheap sources of raw materials, easy preparation and modification, high fluorescence quantum yield, good water solubility, low cytotoxicity, and good biocompatibility. Based on this, researchers have been working on Development of a simple, efficient, and rapid method for the synthesis of carbon quantum dots with high fluorescen...

Claims

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Application Information

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IPC IPC(8): C09K11/65B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/65
Inventor 弓晓娟董文娟张俐王慧萍董川
Owner SHANXI UNIV
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