Preparation method of SrAlB2O7:Eu<3+> fluorescent probe for detection of OPs (organophosphorus pesticides)

An organophosphorus pesticide, sral2b2o7 technology, applied in the field of materials science, can solve the problems of many factors affecting fluorescence quenching, and the inability to determine the exact content of pesticide residues, etc., and achieve the effect of enhanced fluorescence intensity and a wide range of applications

Active Publication Date: 2016-01-20
HEFEI UNIV
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Problems solved by technology

Yao Fei from Northwest University in "Rare Earth Doped TiO 2 Preparation of Nanomaterials and Detection and Degradation of Chlorpyrifos", through the combination of nanotechnology and pesticide detection and treatment, the preparation of rare earth ion-doped titanium dioxide nanomaterials by liquid phase method, the study of rare earth Eu 3+ Doped titanium dioxide colloid was used as a fluorescent probe for the detection of pesticide chlorpyrifos residues, and the results showed that chlorpyrifos had an effect on Eu 3+ doped TiO 2 The fluorescence of nanocolloids has a quenching effect a

Method used

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  • Preparation method of SrAlB2O7:Eu&lt;3+&gt; fluorescent probe for detection of OPs (organophosphorus pesticides)
  • Preparation method of SrAlB2O7:Eu&lt;3+&gt; fluorescent probe for detection of OPs (organophosphorus pesticides)
  • Preparation method of SrAlB2O7:Eu&lt;3+&gt; fluorescent probe for detection of OPs (organophosphorus pesticides)

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specific Embodiment approach

[0041] detailed description: A kind of SrAl for organophosphorus pesticide detection 2 B 2 o 7 :Eu 3+ Preparation method of fluorescent probe, including Eu 3+ Interact with organic phosphorus pesticide molecules, the target analytes of pesticides, to form organic ligands, and calcine Eu after sol and gel 3+ Molecularly imprinted SrAl labeled organophosphorus pesticides 2 B 2 o 7 :Eu 3+ A fluorescent probe, characterized in that: the SrAl 2 B 2 o 7 :Eu 3+ After the template molecule is removed from the fluorescent probe, it has a selective recognition site for the target analyte organophosphorus pesticide molecule, and the target analyte organophosphorus pesticide molecule enters the SrAl 2 B 2 o 7 :Eu 3+ After the recognition site of the fluorescent probe, it will be further combined with the Eu on the recognition site 3+ Interaction occurs so that target analyte organophosphorus pesticide molecule and Eu 3+ Coordinate to form an organic ligand, which transfe...

Embodiment

[0044] Embodiment: utilize metal ion Eu 3+ Form an organic ligand with the target analyte chlorpyrifos, and then use the sol-gel method-calcination to prepare SrAl for selective recognition and sensitive detection of chlorpyrifos 2 B 2 o 7 :Eu 3+ fluorescent probe.

[0045] The first step is Eu 3+ Form an organic ligand with the pesticide target analyte chlorpyrifos molecule: First, weigh 0.3519gEu with a ten-thousandth electronic balance 2 o 3 Put it in a 100mL beaker, then use a 1mL micro-sampler with adjustable scale to pipette and add 2mL nitric acid to the above beaker, and after ultrasonic dispersion reaction for 8min, a transparent solution is formed, then weigh 1.10g of chlorpyrifos and place it after the above reaction To the transparent solution, add 20mL deionized water to dilute, ultrasonically disperse for 8min, then let stand for 25min, Eu 3+ Interact with organophosphorus pesticide molecules, the target pesticide analyte, to form organic ligands;

[0046...

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Abstract

The invention provides a preparation method of a SrAlB2O7:Eu<3+> fluorescent probe for detection of OPs (organophosphorus pesticides). The preparation method comprises two steps as follow: firstly, Eu<3+> and target analyte, OP molecules, interact to form organic ligand, then strontium nitrate, aluminum nitrate, boric acid and a pore-forming agent are added to a beaker accommodating deionized water, the mixture is stirred, and sol is formed; calcination is performed after gel is obtained, and Eu<3+> marked OP molecular printing SrAl2B2O7:Eu<3+> fluorescent probe is obtained. OP molecule selectivity recognition sites are available after template molecules are removed, the OP molecules further interact with Eu<3+> on the recognition sites after entering the recognition sites of the fluorescent probe, the OP molecules and the recognition sites form organic ligand, the organic ligand absorbs energy and transfers the energy to Eu<3+>, the fluorescence intensity of the fluorescent probe is changed, and selective recognition and detection of pesticide molecules are realized.

Description

technical field [0001] The invention relates to the field of material science, in particular to SrAl for the detection of organophosphorus pesticides 2 B 2 o 7 :Eu 3+ Methods for the preparation of fluorescent probes. Background technique [0002] In recent years, research on the detection of pesticides and related fluorescent probes has attracted widespread attention and interest from social research institutions, and some fruitful results have been achieved. Laboratory detection of specific pesticides has been widely used by methods such as spectroscopy, chromatography, and enzyme inhibition. These traditional analytical techniques can meet the basic requirements in analysis, such as selectivity, reliability, accuracy and reproducibility, but these detection methods are expensive, time-consuming and cumbersome, because the sample must be detached The detection site is sent to the laboratory for analysis, and real-time on-site detection cannot be achieved. In summary,...

Claims

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Application Information

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IPC IPC(8): C09K11/64G01N21/64
Inventor 高大明郑传阳江晓敏陈蓓丽陈红张慧朱德春侯婷婷
Owner HEFEI UNIV
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