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A potassium-nitrogen co-doped carbon dot based on steamer peel and its preparation method and application

A co-doping, peeling technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, fluorescence/phosphorescence, etc., can solve problems such as inability to achieve, achieve energy saving, high fluorescence quantum yield, The effect of easy availability of raw materials

Active Publication Date: 2022-05-31
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The publication number is CN 111154485A patent, which invented a kind of sulfur and nitrogen double-doped carbon quantum dots to detect tetracycline antibiotics (tetracycline, chlortetracycline and oxytetracycline) through fluorescence quenching, but it is impossible to realize two of these three antibiotics. Selective identification and detection of these three tetracycline antibiotics when one or three exist simultaneously

Method used

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  • A potassium-nitrogen co-doped carbon dot based on steamer peel and its preparation method and application
  • A potassium-nitrogen co-doped carbon dot based on steamer peel and its preparation method and application
  • A potassium-nitrogen co-doped carbon dot based on steamer peel and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0029] 1) 0.5g of discarded fire wheel peel was placed in a beaker, 8mL of ultrapure water was added, and 8mL of ethylenediamine was added to the solution, and after ultrasonic treatment, a mixed solution was obtained;

[0030] 2) The above mixed solution was placed in an autoclave, and hydrothermally reacted at 150°C for 3h;

[0031] 3) When the reaction is stopped, the reactor is naturally cooled to room temperature, and filtered with filter paper to remove the large particles in the solution after the reaction; after that, the dark brown filtrate is further filtered through a cylindrical membrane filter (0.22 μm) to obtain Potassium and nitrogen co-doped carbon dots aqueous solution prepared from the peel of the steamer;

[0032] 4) The above-mentioned carbon quantum dot aqueous solution was stored in a 4° C. refrigerator for later use, and the relative quantum yield (with quinine sulfate as the standard) was 15%.

[0033] Characterization and application of potassium-nitr...

Embodiment 2

[0035] 1) 0.5g of discarded fire wheel peel was placed in a beaker, 8mL of ultrapure water was added, and 8mL of ethylenediamine was added to the solution, and after ultrasonic treatment, a mixed solution was obtained;

[0036] 2) The above mixed solution was placed in an autoclave, and hydrothermally reacted at 150°C for 2h;

[0037] 3) When the reaction is stopped, the reactor is naturally cooled to room temperature, and filtered with filter paper to remove the large particles in the solution after the reaction; after that, the dark brown filtrate is further filtered through a cylindrical membrane filter (0.22 μm) to obtain Potassium and nitrogen co-doped carbon dots aqueous solution prepared from the peel of the steamer;

[0038] 4) The above-mentioned carbon quantum dot aqueous solution was stored in a 4° C. refrigerator for later use, and the relative quantum yield (based on quinine sulfate) was 12.6%.

Embodiment 3

[0040] 1) 0.5g of discarded fire wheel peel was placed in a beaker, 8mL of ultrapure water was added, and 8mL of ethylenediamine was added to the solution, and after ultrasonic treatment, a mixed solution was obtained;

[0041] 2) The above mixed solution was placed in an autoclave, and hydrothermally reacted at 150°C for 4h;

[0042] 3) When the reaction is stopped, the reactor is naturally cooled to room temperature, and filtered with filter paper to remove the large particles in the solution after the reaction; after that, the dark brown filtrate is further filtered through a cylindrical membrane filter (0.22 μm) to obtain Potassium and nitrogen co-doped carbon dots aqueous solution prepared from the peel of the steamer;

[0043] 4) The above-mentioned carbon quantum dot aqueous solution was stored in a 4° C. refrigerator for later use, and the relative quantum yield (based on quinine sulfate) was 13%.

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Abstract

The invention provides a potassium-nitrogen co-doped carbon dot based on steamer peel and its preparation method and application. In the invention, the potassium-nitrogen co-doped carbon dots are prepared by one-step hydrothermal reaction by taking steamer peel and ethylenediamine as precursors and secondary water as a solvent. The method for preparing carbon quantum dots in the invention is simple, low in cost and easy to obtain raw materials. The potassium-nitrogen co-doped carbon dots were synthesized from discarded steamer peels, which can realize the rational utilization of biomass waste, which not only saves energy, but also is beneficial to environmental protection. The prepared carbon quantum dots have excellent optical properties, and different detection mechanisms based on fluorescence enhancement, fluorescence ratio and fluorescence quenching can realize the identification and selective detection of tetracycline antibiotics. The carbon quantum dot of the invention can be used to detect the contents of aureomycin hydrochloride, tetracycline and oxytetracycline in milk, honey, fish and pork.

Description

[0001] Technology neighborhood [0002] The invention relates to luminescent nanomaterials, in particular to a potassium-nitrogen co-doped carbon dot based on the peel of a fire wheel, and a preparation method and application thereof. Background technique [0003] In the past few decades, great progress has been made in the synthesis, properties and applications of CDs. Researchers have synthesized a large number of carbon dots using small organic molecules, polymers and biomass as carbon sources. Compared with other carbon sources, biomass carbon sources are eco-friendly natural products and have many advantages in preparing carbon dots, including cheap price, readily available raw materials, green and abundant. In addition, carbon dots prepared from natural biomass can convert low-value biomass waste into valuable nanomaterials. This not only saves energy, but also is conducive to environmental protection, and plays a pivotal role in realizing the development model of circ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65B82Y30/00G01N21/64
CPCC09K11/65C09K11/0883B82Y30/00G01N21/6428G01N2021/6432
Inventor 杜芳芳成哲王光辉双少敏董川
Owner SHANXI UNIV
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