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Green-fluorescence carbon quantum dot, and preparation method and application thereof

A technology of green fluorescence and carbon quantum dots, applied in fluorescence/phosphorescence, chemical instruments and methods, nano-carbon, etc., can solve the problems of high requirements for instruments and cumbersome steps, and achieve uniform particle size distribution, simple preparation process, and stable properties Effect

Active Publication Date: 2019-09-20
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional method is relatively mature, the steps are relatively cumbersome and the equipment requirements are high

Method used

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  • Green-fluorescence carbon quantum dot, and preparation method and application thereof
  • Green-fluorescence carbon quantum dot, and preparation method and application thereof
  • Green-fluorescence carbon quantum dot, and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0034] A method for preparing green fluorescent carbon quantum dots. Weigh 2mmol of o-phenylenediamine, 1mmol of thiourea and 20mL of ethanol in a hydrothermal kettle, slowly raise the temperature to 180°C, and keep the temperature for 8 hours. Cool naturally after the reaction is over, then pour the cooled reaction solution in the hydrothermal kettle into a round bottom flask, install the round bottom flask on a rotary evaporator, adjust the temperature to 45°C for vacuum distillation, and wait for the round bottom flask to The reaction solution evaporated completely, leaving a black residue on the bottle wall. Pour 15mL of distilled water into the round bottom flask three times, and the residue on the bottle wall was dissolved Pour the solution into a centrifuge tube in distilled water, put it into a high-speed centrifuge, set the speed at 9000 rpm, and centrifuge for 10 minutes. After centrifugation, pour the supernatant into a small test tube, and then filter through a 0.2...

Embodiment 2

[0036] A method for preparing green fluorescent carbon quantum dots. Weigh 0.5 mmol of o-phenylenediamine, 0.5 mmol of thiourea and 5 mL of ethanol in a hydrothermal kettle, slowly raise the temperature to 120° C., and keep the temperature for 12 hours. Cool naturally after the reaction is over, then pour the cooled reaction solution in the hydrothermal kettle into a round bottom flask, install the round bottom flask on a rotary evaporator, adjust the temperature to 30°C for vacuum distillation, and wait for the round bottom flask to The reaction liquid in the bottle evaporates completely, leaving a black residue on the bottle wall. Pour the distilled water into the round bottom flask three times. , pour the solution into a centrifuge tube, put it into a high-speed centrifuge, set the speed at 4000 rpm, and centrifuge for 12 minutes. After centrifugation, pour the supernatant into a small test tube, and then filter it with a 0.1 micron filter membrane to obtain a filtrate show...

Embodiment 3

[0038] A method for preparing green fluorescent carbon quantum dots. Weigh 5 mmol of o-phenylenediamine, 5 mmol of thiourea and 50 mL of ethanol in a hydrothermal kettle, slowly raise the temperature to 200° C., and keep the temperature for 4 hours. Cool naturally after the reaction is over, then pour the cooled reaction solution in the hydrothermal kettle into a round bottom flask, install the round bottom flask on a rotary evaporator, adjust the temperature to 80°C for vacuum distillation, and wait for the round bottom flask to The reaction liquid in the bottle evaporates completely, leaving a black residue on the bottle wall. Pour the distilled water into the round bottom flask three times. , pour the solution into a centrifuge tube, put it into a high-speed centrifuge, set the speed at 10,000 rpm, and centrifuge for 4 minutes. After centrifugation, pour the supernatant into a small test tube, and then filter through a 0.8-micron filter membrane to obtain a filtrate showing...

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Abstract

The invention discloses a preparation method for a green-fluorescence carbon quantum dot. The preparation method comprises the following steps: weighing o-phenylenediamine, thiourea and ethanol, carrying out mixing, and carrying out a hydrothermal reaction; after completion of the reaction, transferring a product into a container for rotary evaporation until a liquid is completely evaporated so as to reserve a black residue on the wall of the container; then adding distilled water into the container, and allowing the black residue on the wall of the container to be dissolved in the distilled water so as to obtain a residue solution; and centrifuging the residue solution, and after completion of centrifuging, filtering a supernatant so as to obtain the green-fluorescence carbon quantum dot. The green-fluorescence o-phenylenediamine carbon quantum dot prepared by using the hydrothermal method provided by the invention can effectively detect NO.

Description

technical field [0001] The invention belongs to the field of carbon quantum dot preparation, in particular to a green fluorescent carbon quantum dot and its preparation method and application. Background technique [0002] Nitric oxide (NO) is an important signaling molecule in the human body and plays a vital role in physiology and pathology. NO is produced in vivo by the oxidation of arginine by nitric oxide synthase, and plays an indispensable role in signal transduction and immune regulation in organisms. NO plays a very important role in the liver. Abnormal levels of NO in liver tissue can lead to dysfunction of its function, resulting in a series of diseases, such as liver fibrosis, liver cirrhosis, and liver cancer. NO can cause atherosclerosis in the cardiovascular and cerebrovascular system, such as high blood pressure, hyperlipidemia, etc.; in the nervous system, NO plays an important role in the maturation and development of the brain, memory and learning, etc. W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15C09K11/65G01N21/64
CPCC09K11/65C01B32/15G01N21/6428G01N2021/6432
Inventor 黄赛朋周鑫韩谱李文帅温惠云薛伟明
Owner NORTHWEST UNIV(CN)
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