Preparation and application of a cdte/cdse@mips QDs molecularly imprinted polymer

A technology of molecular imprinting and polymers, which is applied in the field of composite materials and chemiluminescence analysis, and can solve problems such as human health hazards and environmental problems

Active Publication Date: 2021-12-14
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the abuse of tetracycline will bring serious environmental problems, and then also cause serious harm to human health

Method used

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  • Preparation and application of a cdte/cdse@mips QDs molecularly imprinted polymer
  • Preparation and application of a cdte/cdse@mips QDs molecularly imprinted polymer
  • Preparation and application of a cdte/cdse@mips QDs molecularly imprinted polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1 Preparation of CdTe / CdSe@MIPs QDs Molecularly Imprinted Polymer

[0040] (1) Synthesis of NaHSe precursor solution: weigh 0.12 g NaBH4 and 0.02 g Se powder, add to a 10 mL distillation bottle, then add 5 mL of high-purity water, and react in a water bath at 60 °C until the black selenium powder is completely response. At this point, the solution turned colorless, and NaHSe solution was obtained as a Se source for future use. The experiment was completed under the protection of nitrogen, and the process produced H at the same time 2 .

[0041] (2) Synthesis of CdTe QDs: 0.0128 g tellurium powder and 0.06 g sodium borohydride were added to a 10 mL distillation bottle, nitrogen gas was added for 30 min, and then 5 mL high-purity water treated with nitrogen gas was added, and reacted in a water bath at 60 ° C. The tellurium powder disappeared completely, and the solution became colorless to obtain the precursor solution NaHTe for later use. The whole experimen...

Embodiment 2

[0044] Example 2, CdTe / CdSe@MIPs QDs Molecularly Imprinted Polymer Recognition of Tetracycline

[0045] Tetracycline, oxytetracycline, penicillin, levofloxacin, ciprofloxacin, lomefloxacin, norfloxacin were added to the aqueous solution of CdTe / CdSe@MIPs QDs molecularly imprinted polymer and CdTe / CdSe@NIPs QDs non-imprinted polymer In the aqueous solution of star, the ratio of the fluorescence quenching constant of CdTe / CdSe@MIPs QDs molecularly imprinted polymers and CdTe / CdSe@NIPs QDs non-imprinted polymers, that is, the imprinting factor value is the largest for tetracycline.

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Abstract

The invention discloses a preparation method of CdTe / CdSe@MIPs QDs molecularly imprinted polymer, which uses water-phase CdTe / CdSe quantum dots modified with thioglycolic acid (TGA) as a fluorescent carrier, and silanizes the surface to obtain TC was used as a template molecule, 3‑aminopropyltriethoxysilane was used as a functional monomer, tetraethylorthosilicate was used as a crosslinking agent, and ammonia water was used as a catalyst to successfully prepare a molecularly imprinted polymer (CdTe / CdSe) on the surface of quantum dots. @MIPs QDs), the experimental preparation process is simple. The CdTe / CdSe@MIPs QDs use tetracycline as a template molecule, through the interaction between the functional monomer and the cross-linking agent, a quantum dot molecularly imprinted polymer with a tetracycline-specific recognition site is formed, and the target The specific recognition of tetracycline can meet the requirements of high selectivity determination of the target in substances similar to the molecular structure of the template.

Description

technical field [0001] The invention relates to a preparation method of a CdTe / CdSe@MIPs QDs molecularly imprinted polymer. The invention also relates to the application of the CdTe / CdSe@MIPs QDs molecularly imprinted polymer in recognizing tetracycline, which belongs to the technical field of composite materials and chemiluminescence analysis technology field. Background technique [0002] Quantum dots (Quantum dots, QDs) are a type of quasi-zero-dimensional nanocrystals with a particle size smaller than or close to the exciton Bohr radius, and its size is generally between 1.0-10 nm. Quantum dots have good optical stability and simple preparation methods, and have been widely used in many fields such as biosensing, medical imaging, and analysis and detection. At present, with the preparation of high-performance quantum dots and the gradual improvement and maturity of surface modification technology, the response of quantum dots in fluorescence and chemiluminescence signal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/26C08G77/08C08J9/26B01J20/26B01J20/30C02F1/28C02F101/34C02F101/38C08L83/08
CPCC08G77/26C08G77/08C08J9/26B01J20/262C02F1/288C08J2201/0424C08J2383/08C02F2101/38C02F2101/345
Inventor 周敏陈志风
Owner NORTHWEST NORMAL UNIVERSITY
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