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Preparation method of water-soluble N-P-codoping carbon dot

A carbon quantum dot and co-doping technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of unfavorable continuous and large-scale production of fluorescent carbon quantum dots, non-renewable energy, low carbon quantum yield, etc. The effect of abundant source, stable fluorescence and high quantum yield

Inactive Publication Date: 2017-11-03
GUANGXI TEACHERS EDUCATION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method often requires strict experimental conditions and special energy sources, the cost is high, and the obtained carbon quantum yield is relatively low
Bottom-up synthesis method, that is, direct synthesis of fluorescent carbon quantum dots by pyrolysis or carbonization of suitable precursors, methods include: combustion method, hydrothermal carbonization method, ultrasonic method, etc., but these methods are often used Non-renewable energy and requires strict post-processing, so it is not conducive to continuous and large-scale production of fluorescent carbon quantum dots

Method used

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  • Preparation method of water-soluble N-P-codoping carbon dot
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  • Preparation method of water-soluble N-P-codoping carbon dot

Examples

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Embodiment 1

[0028] A preparation method of water-soluble nitrogen and phosphorus co-doped carbon quantum dots, comprising the following steps:

[0029] Step 1. In step 1, dissolve 0.2g p-aminobenzenesulfonic acid in 20mL ultrapure water to prepare a precursor solution, and uniformly mix tetrakishydroxymethylphosphine chloride and the precursor solution at a volume ratio of 1:10 to obtain a mixed solution ;

[0030] Step 2. Stir the mixed solution prepared in step 1 evenly, put it into the polytetrafluoroethylene liner of the hydrothermal synthesis reaction kettle, and then place the hydrothermal synthesis reaction kettle in a constant temperature box for heating to obtain a light yellow solution. The temperature of the incubator is 180°C, and the reaction time is 6h;

[0031] Step 3, filter the light yellow solution obtained in step 2 to obtain the filtrate, then dialyze the filtrate, use a dialysis bag with a shear molecular weight of 1000, dialyze for 72 hours to obtain a dialysate, an...

Embodiment 2

[0033] A preparation method of water-soluble nitrogen and phosphorus co-doped carbon quantum dots, comprising the following steps:

[0034] Step 1. In step 1, dissolve 0.2g p-aminobenzenesulfonic acid in 20mL ultrapure water to prepare a precursor solution, and uniformly mix tetrakishydroxymethylphosphine chloride and the precursor solution at a volume ratio of 1:12 to obtain a mixed solution ;

[0035] Step 2. Stir the mixed solution prepared in step 1 evenly, put it into the polytetrafluoroethylene liner of the hydrothermal synthesis reaction kettle, and then place the hydrothermal synthesis reaction kettle in a constant temperature box for heating to obtain a light yellow solution. The temperature of the incubator is 180°C, and the reaction time is 6h;

[0036] Step 3, filter the light yellow solution obtained in step 2 to obtain the filtrate, then dialyze the filtrate, use a dialysis bag with a shear molecular weight of 1000, dialyze for 72 hours to obtain a dialysate, an...

Embodiment 3

[0038] A preparation method of water-soluble nitrogen and phosphorus co-doped carbon quantum dots, comprising the following steps:

[0039] Step 1. In step 1, dissolve 0.2g p-aminobenzenesulfonic acid in 20mL ultrapure water to prepare a precursor solution, and uniformly mix tetrakishydroxymethylphosphine chloride and the precursor solution at a volume ratio of 1:14 to obtain a mixed solution ;

[0040] Step 2. Stir the mixed solution prepared in step 1 evenly, put it into the polytetrafluoroethylene liner of the hydrothermal synthesis reaction kettle, and then place the hydrothermal synthesis reaction kettle in a constant temperature box for heating to obtain a light yellow solution. The temperature of the incubator is 180°C, and the reaction time is 6h;

[0041] Step 3, filter the light yellow solution obtained in step 2 to obtain the filtrate, then dialyze the filtrate, use a dialysis bag with a shear molecular weight of 1000, dialyze for 72 hours to obtain a dialysate, an...

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Abstract

The invention discloses a preparation method of a water-soluble N-P-codoping carbon dot. The preparation method comprises the following steps of (1) dissolving sulfanilic acid into ultrapure water to prepare a precursor solution, and uniformly mixing tetrahydroxymethyl phosphonium chloride and the precursor solution according to the volume ratio of 1:(10 to 20) to obtain a mixed solution; (2) carrying out hydrothermal reaction on the mixed solution prepared in the step (1), and thus obtaining the water-soluble N-P-codoping carbon dot. According to the preparation method of the water-soluble N-P-codoping carbon dot provided by the invention, the water-soluble N-P-codoping carbon dot is prepared by adopting a one-step hydrothermal method, the carbon source is rich and cheap, the preparation process is simple and easy, the whole preparation process is free of pollution and toxicity, and is green and environmentally friendly, and preparation in large scale can be realized.

Description

technical field [0001] The invention relates to the field of preparation of nanometer materials. More specifically, the present invention relates to a preparation method of water-soluble nitrogen and phosphorus co-doped carbon quantum dots. Background technique [0002] In recent years, fluorescent carbon nanomaterials have attracted extensive research by researchers because of their good optical properties and low cytotoxicity. It has good photostability and no toxic side ions, is suitable for long-term detection and tracing experiments, and has broad application prospects in biomarkers and analysis and detection. Carbon quantum dots (CQDs) exhibit excellent properties such as hydrophilicity, low cytotoxicity, chemical and photostability, etc., which have attracted extensive attention and applications in the fields of chemistry, biomedicine, sensing and optoelectronics. [0003] There are currently two main methods for preparing carbon quantum dots: top-down method and bo...

Claims

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Application Information

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IPC IPC(8): C09K11/65
CPCC09K11/70
Inventor 黄珊肖琦杨二利刘义
Owner GUANGXI TEACHERS EDUCATION UNIV
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