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Preparing method of amino carbon quantum dot fluorescence silicon substrate imprint sensor

An amino carbon quantum and carbon quantum dot technology, which is applied in chemical instruments and methods, fluorescence/phosphorescence, luminescent materials, etc., to achieve the effects of large yield, high conversion rate, and easy and feasible operation.

Inactive Publication Date: 2016-03-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of amino carbon quantum dots as optical materials combined with sol-gel method to synthesize carbon quantum dot fluorescent imprinted sensors has rarely been reported.

Method used

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  • Preparing method of amino carbon quantum dot fluorescence silicon substrate imprint sensor
  • Preparing method of amino carbon quantum dot fluorescence silicon substrate imprint sensor
  • Preparing method of amino carbon quantum dot fluorescence silicon substrate imprint sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (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 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.

[0028] (2) Mix 50 μL aminocarbon quantum dot solution, 1 mL double distilled water and 7 mL ethanol into the flask, add 11.7 μL (3-aminopropyl) triethoxysilane and 3.5 mg p-nitrophenol at the same time, and stir for 20 min . Then 44.8 μL tetraethyl orthosilicate and 44.8 μL ammonia water were added to the above system and reacted for 10 hours. After the reaction, wash with water and ethanol several times to remove unrea...

Embodiment 2

[0031] (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 of the dispersion. Centrifuge the dispersion, save the supernatant, and use the amino carbon quantum dot solution.

[0032] (2) Mix 100 μL amino carbon quantum dot solution, 1 mL twice distilled water and 11 mL ethanol into the flask, add 70.2 μL (3-aminopropyl) triethoxysilane and 3.5 mg p-nitrophenol at the same time, stir 30min. Then 134.4 μL tetraethyl orthosilicate and 268.8 μL ammonia water were added to the above system and reacted for 14 hours. After the reaction, wash with water and ethanol several times to remove unreacted substances, and dry the product...

Embodiment 3

[0035] (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. Centrifuge the dispersion, save the supernatant, and use the amino carbon quantum dot solution.

[0036] (2) Mix 80 μL of amino carbon quantum dot solution, 1 mL of double distilled water and 9 mL of ethanol into the flask, add 23.4 μL of (3-aminopropyl) triethoxysilane and 3.5 mg of p-nitrophenol at the same time, and stir 25min. Then 112 μL tetraethyl orthosilicate and 168 μL ammonia water were added to the above system and reacted for 12 hours. After the reaction, wash with water and ethanol several times to remove unreacted substances, and...

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Abstract

The invention relates to a preparing method of an amino carbon quantum dot fluorescence silicon substrate imprint sensor and belongs to the technical field of preparation of an environment function material. The preparing method comprises the following steps: dissolving citric acid and a polymine solution to obtain a transparent solution, then transferring to a hydrothermal reaction kettle for reaction, and then cooling to room temperature to obtain dispersion liquid of amino carbon quantum dots; centrifuging the dispersion liquid to obtain an amino carbon quantum dot solution; then taking the amino carbon quantum dots as fluorescence carriers, p-nitrophenol as template molecules, (3-aminopropyl) triethoxy silane as a function monomer, and tetraethoxysilane as a cross-linking agent so as to obtain a fluorescence molecular imprinted polymer to be used for optical detection of p-nitrophenol. The amino carbon quantum dot fluorescence molecular imprinted polymer has very good optical and pH stabilities and has te capacity of selectively recognizing p-nitrophenol.

Description

technical field [0001] The invention relates to a method for preparing an aminocarbon quantum dot fluorescent silicon-based imprinted sensor, which belongs to the technical field of preparation of environmental functional materials. Background technique [0002] p-Nitrophenol is a common environmental endocrine disruptor, which can stimulate and inhibit the central nervous system. In severe cases, hyperthemoglobinemia and dyspnea will occur, so it has important application value for its monitoring and evaluation. Chromatography is mainly used for the analysis and detection of p-nitrophenol, but chromatography has certain limitations, such as large solvent consumption, time-consuming, tedious sample pretreatment and poor selectivity. Therefore, for the phenolic pollutant residues with complex components, similar properties and low content in the environment, it is imperative to establish and improve a rapid, sensitive and selective analysis and detection method for the monito...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C08G73/04G01N21/64
CPCC09K11/06C08G73/0206G01N21/64
Inventor 郝桐帆周志平聂仪晶
Owner JIANGSU UNIV
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