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Preparation method of molecularly imprinted mesoporous material based on CsPbBr3 quantum dots for detecting dichlorvos

A technology of molecular imprinting and mesoporous materials, which is applied in the field of analytical chemistry, can solve the problems of time-consuming, labor-intensive, and complicated operations, and achieve the effects of improving detection sensitivity, promoting diffusion, and increasing recognition rate

Active Publication Date: 2020-01-17
中山良创印迹材料科技有限公司 +1
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However, most of these methods are complex and time-consuming

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  • Preparation method of molecularly imprinted mesoporous material based on CsPbBr3 quantum dots for detecting dichlorvos
  • Preparation method of molecularly imprinted mesoporous material based on CsPbBr3 quantum dots for detecting dichlorvos
  • Preparation method of molecularly imprinted mesoporous material based on CsPbBr3 quantum dots for detecting dichlorvos

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experiment example

[0053] 1. Characterization of nanoparticle size

[0054] Take a small amount of CsPbBr 3 The QDs were dissolved in n-hexane, dispersed uniformly by ultrasound, and put into nanoparticles for measurement.

[0055] Such as figure 2 CsPbBr shown 3 The particle size distribution of QDs. It can be seen from the figure that after instrumental measurement, CsPbBr 3 The particle distribution of QDs is uniform, and the particle size is about 2.5nm. In an oil-soluble solvent, the quantum dots are coated with a large amount of ligand oleylamine and oleic acid, which greatly reduces the surface defects and surface energy of the quantum dot particles, and reduces the self-aggregation of the quantum dots themselves, so the obtained CsPbBr 3 The QDs particles are small and uniform in size distribution. This provides a particle size possibility for the in-situ growth of quantum dots in mesoporous channels.

[0056] 2. Time-resolved fluorescence spectroscopy characterization

[00...

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Abstract

The invention provides a preparation method of a molecularly imprinted mesoporous material based on CsPbBr3 quantum dots for detecting dichlorvos. The method comprises the following steps: synthesizing mesopores, preparing perovskite quantum dots in situ, and preparing the molecularly imprinted mesoporous material based on CsPbBr3 quantum dots. The method provided by the invention is used to successfully prepare the molecularly imprinted mesoporous material with a regular channel mesoporous structure, and the molecularly imprinted mesoporous material has high response specificity to dichlorvos, is fast and sensitive in detection and has a high recovery rate.

Description

technical field [0001] The invention belongs to the field of analytical chemistry, in particular to a CsPbBr-based method for detecting dichlorvos 3 Preparation method of molecularly imprinted mesoporous materials of quantum dots. Background technique [0002] Dichlorvos (DDVP) is a widely used organophosphorus pesticide. Due to its teratogenicity and residual properties, the detection of organophosphorus pesticide residues is becoming more and more important. So far, the detection methods of organophosphorus pesticides mainly include gas chromatography, gas chromatography mass spectrometry, high performance liquid chromatography, electrochemical analysis and fluorescence analysis. However, most of these methods are complex and time-consuming. Therefore, it is of great significance to find a low-cost, simple, fast, selective and sensitive method to detect dichlorvos. [0003] As we all know, molecular imprinting technology has been widely used, and its unique advantages s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/66B82Y20/00B82Y30/00B82Y40/00G01N21/64C08G77/04C08J9/28C08L83/04
CPCC09K11/02C09K11/665G01N21/6428B82Y20/00B82Y30/00B82Y40/00C08G77/04C08J9/28G01N2021/6432
Inventor 梁勇张立国黄宁
Owner 中山良创印迹材料科技有限公司
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