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Preparation method and application of boron and nitrogen co-doped carbon dot

A technology of co-doping and carbon dots, applied in measuring devices, instruments, fluorescence/phosphorescence, etc., can solve problems such as complex processes and expensive costs, achieve low cost and improve the quantum yield of carbon dots

Active Publication Date: 2018-11-20
SHANXI DATONG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

However, overdose of nimesulide can cause gastrointestinal (abdominal discomfort, heartburn, abdominal cramping, nausea, vomiting and diarrhea), central nervous (headache, dizziness and drowsiness) and genitourinary (blood in urine, urination and renal failure) system-related side effects
The detection of nimesulide is mostly high-performance liquid chromatography, etc., which requires expensive and complicated processes

Method used

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  • Preparation method and application of boron and nitrogen co-doped carbon dot
  • Preparation method and application of boron and nitrogen co-doped carbon dot
  • Preparation method and application of boron and nitrogen co-doped carbon dot

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[0024] A typical embodiment of the present invention provides a method for preparing boron-nitrogen-doped carbon dots, comprising the steps of: placing diammonium hydrogen citrate and pinacolate diboron in a lined polytetrafluoroethylene reactor, and then adding Ultrapure water was heated at 160-240°C for 6-12 hours. After the reaction stopped, the solution was naturally cooled to room temperature, and the solution was centrifuged at high speed, filtered and freeze-dried. The obtained yellow solid powder was the fluorescent carbon dot.

[0025] In the above embodiments, diammonium hydrogen citrate and pinacol diboron are used as carbon and boron sources, the raw materials are non-toxic, cheap and easy to obtain, and the reaction conditions are mild, and can be prepared in a general laboratory. It was found in the experiment that the quantum yield of carbon dots prepared only with diammonium hydrogen citrate as the carbon source was not high, and the addition of pinacol and dibo...

Embodiment 1

[0036] Preparation of boron-nitrogen-doped carbon dots: Weigh 0.4g of diammonium hydrogen citrate and 0.8g of pinacolate diboron into a polytetrafluoroethylene-lined reactor, then add 20mL of ultrapure water, React at 200°C for 8h. After the reaction was completed, cool to room temperature to obtain a solution of boron-nitrogen-doped carbon dots. The solution was centrifuged at a high speed of 8500 rpm / min for 10 min, then filtered with a 0.22 µm filter membrane, and then freeze-dried to obtain a yellow solid. The solid Disperse in ultrapure water for easy characterization, and store at around 4°C until use. For its properties, see Figure 1-5 .

Embodiment 2

[0038] Preparation of boron-nitrogen-doped carbon dots: Weigh 0.6g of diammonium hydrogen citrate and 0.6g of pinacolate diboron into a polytetrafluoroethylene-lined reactor, then add 20mL of ultrapure water, React at 200°C for 8h. After the reaction was completed, cool to room temperature to obtain a solution of boron and nitrogen doped carbon dots. The solution was centrifuged at a high speed of 8500 rpm / min for 10 min, then filtered with a 0.22 µm filter membrane, and then freeze-dried to obtain a yellow solid. Disperse into ultrapure water for easy characterization, and store at around 4°C until use.

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Abstract

The invention relates to a preparation method and application of a boron and nitrogen co-doped carbon dot. The preparation method comprises the following steps: putting diammonium hydrogen citrate andpinacol diboron into a lining polytetrafluoroethylene reaction kettle; then adding ultrapure water; heating the solution at 160 to 240 DEG C for 6 to 12 h; at the end of the reaction, naturally cooling the solution to room temperature, and performing high-speed centrifugation, filtration and freeze drying on the solution to obtain yellow solid powder which is the carbon dot. When the boron and nitrogen co-doped carbon dot is used for detecting nimesulide, the fluorescence intensity, at 408 nm, of a solution is prepared from a solution prepared from the carbon dot, a nimesulide-containing sample solution to be tested and a B-R buffer solution with the pH of 10 is measured by using a fluorescence spectrophotometer, and the concentration of the nimesulide is calculated according to a standard curve; extremely high selectivity is achieved.

Description

technical field [0001] The invention relates to the preparation of carbon nano-luminescent materials, in particular to a preparation method and application of boron-nitrogen doped fluorescent carbon dots with high quantum yield. Background technique [0002] Carbon dots, a new member of the nanomaterial family, have attracted more and more attention due to their low cytotoxicity, good biocompatibility, and good photostability. In recent years, carbon dots have been applied in different fields, such as the detection of metal ions, ascorbic acid, purine, glutathione, organophosphorus pesticides, and bioimaging. [0003] There are currently a series of methods for synthesizing carbon dots, including ultrasonic oscillation, arc discharge, microwave-assisted method, and hydrothermal synthesis. Among them, hydrothermal synthesis is very popular due to the mild reaction conditions and simple synthesis process. In addition, usually heteroatoms such as N and B are used as dopant at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/6402
Inventor 宋金萍马琦梁晓敏张素芳冯锋郭永
Owner SHANXI DATONG UNIV
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