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Preparation method of water-soluble nitrogen-sulfur-phosphorus codoped carbon quantum dot

A carbon quantum dot, co-doping technology, applied in chemical instruments and methods, measurement devices, fluorescence/phosphorescence, etc., can solve the problems of continuous and large-scale production of fluorescent carbon quantum dots, non-renewable energy, and low carbon quantum yield. problem, to achieve the effect of rich carbon source, high quantum yield and good water solubility

Active Publication Date: 2017-11-24
安徽寒锐新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 nitrogen-sulfur-phosphorus codoped carbon quantum dot
  • Preparation method of water-soluble nitrogen-sulfur-phosphorus codoped carbon quantum dot
  • Preparation method of water-soluble nitrogen-sulfur-phosphorus codoped carbon quantum dot

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Embodiment 1

[0029] A preparation method of water-soluble nitrogen, sulfur and phosphorus co-doped carbon quantum dots, comprising the following steps:

[0030] Step 1, 0.1g p-aminobenzenesulfonic acid is dissolved in 20mL ultrapure water to obtain precursor solution I, 0.1g phenylphosphonic acid is dissolved in 20mL ultrapure water to obtain precursor solution II, by volume ratio 1: 1 Uniformly mixing precursor solution I and precursor solution II to obtain a mixed solution;

[0031] 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;

[0032] 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 mo...

Embodiment 2

[0034] A preparation method of water-soluble nitrogen, sulfur and phosphorus co-doped carbon quantum dots, comprising the following steps:

[0035] Step 1, 0.1g p-aminobenzenesulfonic acid is dissolved in 20mL ultrapure water to obtain precursor solution I, 0.1g phenylphosphonic acid is dissolved in 20mL ultrapure water to obtain precursor solution II, by volume ratio 2: 1 Uniformly mixing precursor solution I and precursor solution II to obtain a mixed solution;

[0036] 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;

[0037] 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 mo...

Embodiment 3

[0039] A preparation method of water-soluble nitrogen, sulfur and phosphorus co-doped carbon quantum dots, comprising the following steps:

[0040] Step 1, 0.1g p-aminobenzenesulfonic acid is dissolved in 20mL ultrapure water to make precursor solution I, 0.1g phenylphosphonic acid is dissolved in 20mL ultrapure water to make precursor solution II, by volume ratio 3: 1 Uniformly mixing precursor solution I and precursor solution II to obtain a mixed solution;

[0041] 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;

[0042] 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 molecu...

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Abstract

The invention discloses a preparation method of a water-soluble nitrogen-sulfur-phosphorus codoped carbon quantum dot. The preparation method comprises the following steps: I, dissolving sulfanilic acid in ultra pure water to obtain a precursor solution I, dissolving phenylphosphinic acid in ultra pure water to obtain a precursor solution II, and uniformly mixing the precursor solution I with the precursor solution II in the volume ratio of the precursor solution I to the precursor solution II being (1-6) to 1 so as to obtain a mixed solution; step II, performing a hydrothermal reaction on the mixed solution prepared in the step I so as to obtain the water-soluble nitrogen-sulfur-phosphorus codoped carbon quantum dot. According to the preparation method disclosed by the invention, the water-soluble nitrogen-sulfur-phosphorus codoped carbon quantum dot is prepared by the one-step hydrothermal method, carbon sources are rich and cheap, a preparation process is simple and easy, the whole preparation process is pollution-free, non-toxic, green and environmentally-friendly, and the water-soluble nitrogen-sulfur-phosphorus codoped carbon quantum dot can be prepared in a large-scale manner.

Description

technical field [0001] The invention relates to the field of preparation of nanometer materials. More specifically, the present invention relates to a method for preparing water-soluble nitrogen, sulfur, 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 metho...

Claims

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Application Information

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IPC IPC(8): C09K11/70B82Y20/00B82Y40/00B82Y30/00G01N21/64
CPCB82Y20/00B82Y30/00B82Y40/00C09K11/701G01N21/6402
Inventor 黄珊肖琦杨二利刘义
Owner 安徽寒锐新材料有限公司
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