Preparation method of amino CQD (carbon quantum dot) fluorescence and 4-nitrophenol molecularly imprinted sensor

A technology of p-nitrophenol and amino carbon quantum, which is applied in the direction of fluorescence/phosphorescence, instruments, measuring devices, etc., to achieve the effects of high conversion rate, expanded application range, and high optical performance

Inactive Publication Date: 2016-04-06
JIANGSU UNIV
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis of carbon quantum dot fluorescent imprinted sensors by free radical polymerization has not been reported yet.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of amino CQD (carbon quantum dot) fluorescence and 4-nitrophenol molecularly imprinted sensor
  • Preparation method of amino CQD (carbon quantum dot) fluorescence and 4-nitrophenol molecularly imprinted sensor
  • Preparation method of amino CQD (carbon quantum dot) fluorescence and 4-nitrophenol molecularly imprinted sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Add 2g of citric acid and 1g of polyethyleneimine into 30mL of deionized water, and fully dissolve to obtain a transparent solution. Then transfer the mixed solution to a hydrothermal reaction kettle with a volume of 50mL, place the reaction kettle in an oven, heat up to 160°C, react for 4 hours, and cool to room temperature to obtain an amino carbon quantum with high-performance fluorescent properties The dispersion of dots; the dispersion is centrifuged, and the supernatant is preserved to obtain an amino carbon quantum dot solution.

[0026] (2) In a 100mL round bottom flask, add 0.5mL of the aminocarbon quantum dot solution obtained in step (1) and 55mL of ethanol, ultrasonically disperse, and 2Under certain conditions, add 0.05mmol p-nitrophenol, 0.2mmolAM, 0.6mmol EGDMA, 5mgAIBN, then seal the flask, place it in a water bath shaker, pre-polymerize at 48°C for 5h, and polymerize at 58°C for 20h. After the reaction, wash with ethanol Several times to remove unr...

Embodiment 2

[0028] (1) Add 2g of citric acid and 2g of polyethyleneimine into 40mL of deionized water, and fully dissolve to obtain a transparent solution. Then transfer the mixed solution to a hydrothermal reaction kettle with a volume of 50mL, place the reaction kettle in an oven, heat up to 200°C, react for 8 hours, and cool to room temperature to obtain aminocarbon quantum dots with high-performance fluorescent properties The dispersion liquid; the dispersion liquid is centrifuged, and the supernatant is preserved to obtain an amino carbon quantum dot solution.

[0029] (2) In a 100mL round bottom flask, add 0.5mL of the amino carbon quantum dot solution obtained in step (1) and 65mL of ethanol, ultrasonically disperse, and 2 Under certain conditions, add 0.05mmol p-nitrophenol, 0.4mmolAM, 1mmol EGDMA, 10mgAIBN, then seal the flask, place it in a water bath shaker, pre-polymerize at 52°C for 7h, and polymerize at 62°C for 28h. After the reaction, wash with ethanol for several times t...

Embodiment 3

[0031] (1) Add 2g of citric acid and 1.5g of polyethyleneimine into 35mL of deionized water, and fully dissolve to obtain a transparent solution. Then transfer the mixed solution to a hydrothermal reaction kettle with a volume of 50mL, place the reaction kettle in an oven, heat up to 180°C, react for 6 hours, and cool to room temperature to obtain aminocarbon quantum dots with high-performance fluorescent properties of the dispersion. The dispersion liquid is centrifuged, and the supernatant liquid is preserved to obtain an amino carbon quantum dot solution.

[0032] (2) In a 100mL round bottom flask, add 0.5mL of the aminocarbon quantum dot solution obtained in step (1) and 60mL of ethanol, ultrasonically disperse, and 2 Under certain conditions, add 0.05mmol p-nitrophenol, 0.3mmol AM, 0.8mmol EGDMA, 8mgAIBN, then seal the flask, place it in a water bath shaker, pre-polymerize at 50°C for 6h, and polymerize at 60°C for 24h. After the reaction, wash with ethanol Several time...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a preparation method of an amino CQD (carbon quantum dot) fluorescence and 4-nitrophenol molecularly imprinted sensor and belongs to the technical field of environment function materials. According to the method, firstly, citric acid and polyethyleneimine are added to water and dissolved, and a transparent solution is obtained; the transparent solution is transferred to a hydrothermal reaction kettle, is heated, reacts and is cooled, and an amino CQD dispersion liquid is obtained; the dispersion liquid is centrifuged, and an amino CQD solution is obtained; the amino CQD solution and ethanol are added to a flask, 4-nitrophenol, AM (acrylamide), EGDMA (ethylene dimethacrylate) and AIBN (2,2'-azobis(2-methylpropionitrile)) are added, N2 is introduced for oxygen removal, after two steps of polymerization, a product is washed with water and ethanol, unreacted substances are removed, and the product is dried in a vacuum drying oven; 4-nitrophenol as a template molecule is eluted by an eluent, and the CQD fluorescence molecularly imprinted polymer is obtained. The fluorescence molecularly imprinted polymer has better optical stability and can rapidly recognize and optically detect 4-nitrophenol.

Description

technical field [0001] The invention relates to a preparation method of an amino carbon quantum dot fluorescent p-nitrophenol imprinting sensor, which belongs to the technical field of preparation of environmental functional materials. Background technique [0002] In recent years, the application of fluorescent carbon nanomaterials has received more and more attention. As a new type of fluorescent carbon nanomaterials, carbon quantum dots have aroused widespread interest by virtue of their ideal fluorescence properties and biocompatibility. Carbon quantum dots not only have ideal anti-photobleaching and flicker-free optical properties, but also have no cytotoxicity, biochemical inertness, thermal stability, and easy metabolism of organisms. Therefore, carbon quantum dots can become a substitute for traditional quantum dots and organic molecules. It is an excellent choice of dyes and can be widely used in many fields. For this reason, the basic research of fluorescent carbon...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N21/64
CPCG01N21/643G01N2021/6432
Inventor 郝桐帆周志平聂仪晶
Owner JIANGSU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap