A kind of europium-based coordination polymer nanosphere and its preparation method and application

A technology of coordination polymers and nanospheres, applied in fluorescence/phosphorescence, instruments, analytical materials, etc., can solve the problems of limiting the wide application of fluorescence methods, complex synthesis methods, high raw material costs, etc., and achieve excellent detection selectivity and synthesis The method is simple and the cost of raw materials is low

Active Publication Date: 2019-04-09
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In the prior art, the fluorescent materials used in the fluorescence method are mainly quantum dots, metal clusters, organic dyes and polymers, etc., but these fluorescent materials at least have inherent toxicity, instability, easy light fading, poor water solubility, and raw material costs. One or more of the disadvantages of high cost and complex synthetic methods, thus limiting the wide application of fluorescence methods

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  • A kind of europium-based coordination polymer nanosphere and its preparation method and application
  • A kind of europium-based coordination polymer nanosphere and its preparation method and application
  • A kind of europium-based coordination polymer nanosphere and its preparation method and application

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preparation example Construction

[0029] A europium-based coordination polymer nanosphere is prepared by a simple one-step solvothermal method, and its specific preparation method may include the following steps: adding EuCl 3 ·6H 2 O (i.e. europium trichloride crystal), H 2 BDC (that is, terephthalic acid) and polyvinylpyrrolidone (that is, PVP) are added to a mixed solvent of N,N-dimethylformamide (that is, DMF) and absolute ethanol (that is, EtOH), and stirred Until completely dissolving, then the mixed solution is transferred to a reaction kettle with a polytetrafluoroethylene liner, and placed in an oven at 150° C. for 12 hours, thereby preparing a reaction mixture in the reaction kettle in the oven; The reaction mixture is cooled, centrifuged, washed and vacuum-dried in sequence to obtain europium-based coordination polymer nanospheres; the europium-based coordination polymer nanospheres are light gray powder.

[0030] Wherein, the preparation method of the above-mentioned europium-based coordination p...

Embodiment 1

[0039] A europium-based coordination polymer nanosphere is prepared by the following method: 0.2345g of EuCl 3 ·6H 2 O, 0.0192g of H 2 BDC and 1.6g of polyvinylpyrrolidone were added to the mixed solvent mixed with N,N-dimethylformamide and absolute ethanol according to the volume ratio of 5:3, and stirred until completely dissolved, then the mixed solution was transferred into a reaction kettle with a polytetrafluoroethylene liner, and placed in an oven at 150° C. for 12 hours to prepare a reaction mixture in the reaction kettle in the oven. The reaction mixture is naturally cooled to room temperature, and centrifuged at a speed of 3000rpm for 3 to 5 minutes, then the substrate after centrifugation is removed, and the suspension after centrifugation is centrifuged at a speed of 10000rpm for 3 to 5 minutes The re-centrifugation treatment, and then use N,N-dimethylformamide and absolute ethanol to wash the solid after the re-centrifugation treatment several times, and carry o...

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Abstract

The invention discloses a europium-based coordination polymer nanosphere and a preparation method and application thereof. The preparation method of the europium-based coordination polymer nanosphere comprises the following steps of adding EuCl3.6H2O, H2BDC and polyvinylpyrrolidone to mixed solvent formed by mixing N, N-dimethylformamide and absolute ethyl alcohol, and conducting stirring till the materials are fully dissolved; then, transferring a mixed solution into a reaction still provided with a polytetrafluoroethylene inner container, and putting the reaction still in a drying oven at the temperature of 150 DEG C to leave the reaction still standing still for 12 hours; and then sequentially conducting cooling, centrifugalization, washing and vacuum drying, so that the europium-based coordination polymer nanospheres are obtained. A to-be-detected water body is added to fluorescent material suspension liquid prepared from the europium-based coordination polymer nanospheres; after being mixed uniformly, the materials are left standing still; and then a fluorescence spectrophotometer is adopted for detection, and the content of phosphate in the to-be-detected water body can be obtained. The europium-based coordination polymer nanosphere is stable in performance, not prone to photobleaching, good in water solubility, capable of effectively detecting the content of the phosphate in the water body, simple in synthesis method and low in raw material cost.

Description

technical field [0001] The invention relates to the field of detection of water body pollutants, in particular to a europium-based coordination polymer nanosphere and its preparation method and application. Background technique [0002] Phosphorus is an essential element that constitutes organisms and participates in metabolic processes, and is widely distributed in the natural environment and in people's production and life. With the rapid development of social economy, a large amount of phosphorus-rich substances such as industrial wastewater, domestic sewage, chemical fertilizers and pesticides are discharged into the natural environment. When these phosphorus-rich substances flow into rivers, lakes, oceans and other natural water bodies, The phosphate content in the water body has increased significantly, and these phosphates will be directly absorbed and utilized by aquatic organisms, which will cause a large number of planktonic algae to multiply and consume dissolved ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00G01N21/64
CPCC08G83/008G01N21/643G01N2021/6432
Inventor 张云霞宋向阳汪国忠张海民
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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