Preparation method and application of ZnS quantum dot silica-based surface molecular imprinting sensor

A technology of surface molecular imprinting and quantum dots, which is applied in the direction of material excitation analysis, fluorescence/phosphorescence, etc., can solve the problems of long reaction time, complicated operation, poor selectivity, etc., achieve the improvement of sensitivity and selectivity, increase the reaction rate, and benefit The effect of desorption and recombination
CN104237183AInactive Publication Date: 2014-12-24JIANGSU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU UNIV
Publication Date
2014-12-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a preparation method and application of a ZnS quantum dot silica-based surface molecular imprinting sensor, belonging to the technical field of environmental function material preparation. The preparation method comprises the following steps: hydrolyzing silicon tetraacetate in a mixed solution of alkaline ethanol and water to prepare SiO2, and meanwhile adding a water solution of sodium sulphide hydrate in the water solution of zinc sulfate heptahydrate and tetrahydrate manganese chloride to prepare Mn-ZnS quantum dot; then respectively performing vinyl modification on the obtained SiO2 and Mn-ZnS quantum dot by using 3-methacryloxypropyltrimethoxysilane; and synthesizing the quantum dot phosphorescence surface molecular imprinting polymer through a precipitation polymerization method by using 2,4-dichlorophenol as a template molecule, acrylamide as functional monomer, Mn-ZnS-KH570 as an auxiliary monomer, SiO2-KH570 as a host material, ethylene dimethacrylate as a cross-linking agent, 2,2'-azobis(2-methylpropionitrile) as an initiator, and acetonitrile as solvent. The prepared phosphorescence surface molecular imprinting polymer has good optical and pH stability and has the capability of selectively recognizing 2,4-dichlorophenol.
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Description

technical field

[0001] The invention relates to a preparation method and application of a ZnS quantum dot silicon-based surface molecularly imprinted phosphorescence sensor, which belongs to the technical field of environmental functional material preparation. Background technique

[0002] Molecular imprinting technology (MIT) is an emerging polymerization technology that can specifically recognize a specific molecule in recent years. The polymers prepared by this method are called molecularly imprinted polymers (Molecularly imprinted polymers). , MIPs). The preparation method is generally that when there is a template molecule in the system, the functional monomer can be polymerized to fix the template molecule in a complementary manner in the presence of a cross-linking agent. After the polymerization, the template molecules can be removed, so in this process, the "snapshot" of the system changes can be "taken" or recorded, so that the obtained molecular assembly can ...

Claims

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