Two-dimensional fluorescent MOFs composite material, preparation method and application thereof, and method for fluorescence detection of iron ions

A composite material, fluorescence detection technology, applied in the direction of fluorescence/phosphorescence, material analysis by optical means, analysis of materials, etc., can solve the problems of environmental and health threats, expensive instruments, complicated operation, etc., to achieve good stability and dispersion. , excellent adsorption performance, simple synthesis method

Active Publication Date: 2022-05-13
INST OF VEGETABLE & FLOWERS CHINESE ACAD OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, due to the abuse of metallic materials in chemical production, Fe 3+ It has become the main pollutant of environmental degradation and poses a serious threat to the environment and health
Although current detection techniques including ion chromatography or inductively coupled plasma mass spectrometry are available for Fe 3+ However, due to the disadvantages of expensive instruments, long experimental period, and complicated operation, their further practical applications are greatly limited

Method used

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  • Two-dimensional fluorescent MOFs composite material, preparation method and application thereof, and method for fluorescence detection of iron ions
  • Two-dimensional fluorescent MOFs composite material, preparation method and application thereof, and method for fluorescence detection of iron ions
  • Two-dimensional fluorescent MOFs composite material, preparation method and application thereof, and method for fluorescence detection of iron ions

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preparation example Construction

[0059] According to one aspect of the present invention, the present invention relates to a method for preparing a two-dimensional fluorescent MOFs composite material, comprising the following steps:

[0060] stirring the mixture of carbon quantum dots, 2-methylimidazole, soluble zinc salt and water to obtain a first mixed system; washing the emulsion in the first mixed system, and then dispersing the washed emulsion in water and dry.

[0061] Carbon quantum dots (CDs), as a novel nanoluminescent material with quantum size, have attracted much attention due to their excellent optical properties, low toxicity and high biocompatibility. CDs are good electron donors and acceptors due to their abundant surface sites and functional groups, easy structure modification, and excellent electron transfer properties. However, fluorescence quenching occurs due to the easy aggregation of CDs during electron transfer. Therefore, it is an effective way to solve the above problems by introd...

Embodiment 1

[0097] A method for preparing a two-dimensional fluorescent MOFs composite material, comprising the following steps:

[0098] Dissolve 0.5mL, 3mg / mL of CDs and 0.168g of 2-methylimidazole in 5mL of deionized water for 10min, then add 0.152g of Zn(NO 3 ) 2 ·6H 2 O. Magnetic stirring was used at 37°C for 2 h, and the resulting white emulsion was washed twice with deionized water; finally, the product was dispersed in 10 mL of deionized water and dried under vacuum at 60°C for 6 hours.

Embodiment 2

[0100] A method for preparing a two-dimensional fluorescent MOFs composite material, comprising the following steps:

[0101] Dissolve 0.5mL, 3mg / mL of CDs and 0.168g of 2-methylimidazole in 5mL of deionized water for 8min, then add 0.152g of Zn(NO 3 ) 2 ·6H 2 O. Magnetic stirring was used at 37°C for 5 h, and the obtained white emulsion was washed three times with deionized water; finally, the product was dispersed in 10 mL of deionized water and dried under vacuum at 80°C for 5 hours.

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Abstract

The invention relates to the technical field of agricultural pollutant control and treatment, in particular to a two-dimensional fluorescent MOFs composite material, a preparation method and application thereof and a method for fluorescence detection of iron ions. The preparation method of the two-dimensional fluorescent MOFs composite material comprises the following steps: stirring a mixture of carbon quantum dots, 2-methylimidazole, soluble zinc salt and water to obtain a first mixed system; and washing the emulsion in the first mixed system, dispersing the washed emulsion in water, and carrying out drying treatment. The composite material is prepared by encapsulating fluorescent CDs in pores of ZIF-L, the synthesis method is simple and cheap, and the obtained composite material not only has the advantages of a fluorescent probe, but also can enrich pollutants through the strong adsorption capacity of MOFs, so that the detection sensitivity is improved; the composite material has good stability and dispersibility in an aqueous solution, and can be applied to sensitive and selective detection of Fe < 3 + >.

Description

technical field [0001] The invention relates to the technical field of agricultural pollutant control and treatment, in particular to a two-dimensional fluorescent MOFs composite material and its preparation method, application and method for fluorescent detection of iron ions. Background technique [0002] Iron ions (Fe 3+ ) is an essential transition metal ion in biological systems, iron deficiency or excess can lead to certain diseases, such as anemia, heart failure, diabetes and cancer. In addition, due to the abuse of metallic materials in chemical production, Fe 3+ It has become the main pollutant of environmental deterioration and poses a serious threat to the environment and health. Although current detection techniques including ion chromatography or inductively coupled plasma mass spectrometry are available for Fe 3+ However, due to the disadvantages of expensive instruments, long experimental period, and complicated operation, their further practical applicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00G01N21/64
CPCC08G83/008G01N21/643Y02A50/30
Inventor 徐东辉刘广洋高明坤刘中笑李凌云陈鸽黄晓冬许晓敏周杰花雨薇张延国林桓
Owner INST OF VEGETABLE & FLOWERS CHINESE ACAD OF AGRI SCI
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