A kind of fluorescent film sensing composite material and its preparation method and application

A technology of composite materials and thin films, which is applied in the direction of luminescent materials, material analysis through optical means, and analysis of materials, etc., to achieve the effects of increasing fluorescence intensity, preventing shedding, and improving response and selectivity

Active Publication Date: 2017-04-19
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the above problems by adding a photonic crystal thin film layer to the existing fluorescent thin film sensing composite material

Method used

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  • A kind of fluorescent film sensing composite material and its preparation method and application
  • A kind of fluorescent film sensing composite material and its preparation method and application
  • A kind of fluorescent film sensing composite material and its preparation method and application

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Effect test

Embodiment 1

[0041] A kind of preparation method of fluorescent film sensing composite material, described preparation method comprises the steps:

[0042]① Add 300 μL of water-soluble polystyrene microspheres with a particle size of 240 nm into 5 mL of deionized water, oscillate ultrasonically for 30 minutes, insert the vertical part of the conductive glass into the aqueous solution of water-soluble polystyrene microspheres, and react at 55 ° C for 12 hours to obtain Polystyrene microsphere photonic crystal film on the surface of conductive glass, its morphology is shown in the attached figure 1 ;

[0043] ②Dissolve 100mg of cadmium chloride in 100mL of high-purity water, add 21.7mg of thioglycolic acid and 5mL of 2mol / L sodium hydroxide solution in sequence, pass nitrogen to deoxygenate for 30min, add 1mL of quantum dot precursor, and react hydrothermally at 80°C for 12h to obtain mercapto Acetic acid-modified cadmium telluride solution; soak the product obtained in step ① vertically i...

Embodiment 2

[0045] A kind of preparation method of fluorescent film sensing composite material, described preparation method comprises the steps:

[0046] ① Add 300 μL of silica microspheres with a particle size of 240 nm into 5 mL of deionized water, oscillate ultrasonically for 30 minutes, insert the vertical part of the conductive glass into the aqueous solution of silica microspheres, and react at 55 ° C for 12 hours to obtain a microsphere covering the surface of the conductive glass. Silica microsphere photonic crystal thin film;

[0047] ②Dissolve 100mg of cadmium chloride in 100mL of high-purity water, add 25.0mg of 3-mercaptopropionic acid and 5mL of 2mol / L sodium hydroxide solution in sequence, pass nitrogen to deoxygenate for 30min, add 1mL of quantum dot precursor solution, and react with water at 80℃ for 3h. Obtain a cadmium telluride solution modified with 3-mercaptopropionic acid; soak the product obtained in step ① vertically in 1wt% gamma-aminopropyltrimethoxysilane absol...

Embodiment 3

[0049] A kind of preparation method of fluorescent film sensing composite material, described preparation method comprises the steps:

[0050] ① Add 300μL of water-soluble polystyrene microspheres with a particle size of 240nm into 5mL of deionized water, and oscillate ultrasonically for 30 minutes. Water-soluble polystyrene microsphere photonic crystal film on glass surface;

[0051] ②Dissolve 100mg of cadmium chloride in 100mL of high-purity water, add 25.0mg of 2-mercaptopropionic acid, 5mL of 2mol / L sodium hydroxide solution in turn, pass nitrogen to deoxygenate for 30min, add 1mL of quantum dot precursor solution, and react with hydrothermal reaction at 80℃ for 7h. Obtain a cadmium telluride solution modified with 2-mercaptopropionic acid; vertically immerse the product obtained in step ① in 1 wt% N-β-aminoethyl-γ-aminopropyltrimethoxysilane absolute ethanol solution for activation for 30 minutes, and dry , vertically soaked in 2-mercaptopropionic acid-modified cadmium t...

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Abstract

The invention relates to a fluorescent film sensing composite material as well as a preparation method and application thereof, belonging to the field of fluorescent film sensing materials. The material comprises conductive glass, photonic crystals and quantum dots, wherein the photonic crystals cover the surface of the conductive glass to form a photonic crystal film; the quantum dots are self-assembled on the surface of the photonic crystal film to form a quantum dot film; and emission peaks of the quantum dots are in the ranges of photonic band gaps of the photonic crystals. The fluorescent film sensing composite material has the beneficial effects that the fluorescent film sensing composite material has the characteristics of good water resistance, low possibility in falling off of fluorescent films, high sensitivity, and the like.

Description

technical field [0001] The invention relates to a fluorescent thin film sensing composite material, a preparation method and an application thereof, and belongs to the field of fluorescent thin film sensing materials. Background technique [0002] With the enhancement of people's awareness of environmental protection, more and more attention is paid to the pollution of heavy metal ions in the environment and domestic sewage, especially Pb 2+ , Hg 2+ 、Cd 2+ 、Cu 2+ As well as the pollution of water bodies by heavy metal elements with significant biological toxicity such as metal arsenic. For some reasons, heavy metal ions are directly discharged into rivers, lakes or oceans without treatment or after treatment without reaching the GB8978-1669 "Integrated Wastewater Discharge Standard", and eventually pollute them. Because they cannot be biodegraded, on the contrary they can It is enriched under the biomagnification of the food chain and finally enters the human body. Heav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/88C09K11/02G01N21/64
CPCC09K11/025C09K11/883G01N21/643
Inventor 张秀芳陈禹彤何雯雯余春林
Owner DALIAN POLYTECHNIC UNIVERSITY
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