Preparation and application of CdTe/CdSe@MIPs QDs molecularly imprinted polymer

A molecular imprinting and polymer technology, applied in the field of chemiluminescence analysis and composite materials, can solve environmental problems, human health hazards and other problems, and achieve the effect of simple preparation process and high selectivity measurement requirements.

Active Publication Date: 2020-11-17
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 environme

Method used

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  • Preparation and application of CdTe/CdSe@MIPs QDs molecularly imprinted polymer
  • Preparation and application of CdTe/CdSe@MIPs QDs molecularly imprinted polymer
  • Preparation and application of CdTe/CdSe@MIPs QDs molecularly imprinted polymer

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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 a CdTe/CdSe@MIPs QDs molecularly imprinted polymer, which comprises the following steps: by using thioglycolic acid (TGA)-modified water-phase CdTe/CdSequantum dots as a fluorescent carrier, carrying out silanization modification on the surface of the fluorescent carrier; with TC as a template molecule and 3-aminopropyltriethoxysilane as a functional monomer, tetraethoxysilane as a crosslinking agent and ammonia water as a catalyst, successfully preparing the quantum dot surface molecularly imprinted polymer (CdTe/CdSe@MIPs QDs), wherein the experimental preparation process is simple. According to the CdTe/CdSe@MIPs QDs, tetracycline is taken as a template molecule, a quantum dot molecularly imprinted polymer with tetracycline specific recognition sites is formed through interaction of a functional monomer and a cross-linking agent, specific recognition of tetracycline of a target object is achieved, and the requirement for high-selectivity measurement of the target object is reached in substances similar to a template molecular structure.

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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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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