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Preparation method for cerium-base metallic organic framework material, application thereof in Co(II) recognition and fluorescence detection method

An organic framework and fluorescence detection technology, applied in the field of chemical metal identification, can solve problems such as death, pollution, cobalt poisoning of humans, animals and plants, and achieve the effects of high detection sensitivity, low cost, and low detection limit

Active Publication Date: 2018-12-07
HOHAI UNIV
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Problems solved by technology

However, excessive cobalt content will cause serious pollution to the atmosphere, water and soil, leading to cobalt poisoning and even death of humans, animals and plants, so it is crucial to develop a fast and easy method for the detection of Co(II)
At present, except for the traditional chemical reagent test method, there are almost no widely used Co(II) test methods

Method used

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  • Preparation method for cerium-base metallic organic framework material, application thereof in Co(II) recognition and fluorescence detection method
  • Preparation method for cerium-base metallic organic framework material, application thereof in Co(II) recognition and fluorescence detection method
  • Preparation method for cerium-base metallic organic framework material, application thereof in Co(II) recognition and fluorescence detection method

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0028] A preparation method of a cerium-based metal-organic framework material:

[0029] In a 20mL reactor liner, add 0.01g of 5-aminoisophthalic acid and 0.005g of 4,4'-(1,3-propanediyl)bipyridine into 6mL of water, and then add 0.02 cerium nitrate hexahydrate g, sonicate for half an hour to mix it. Put the liner of the reaction kettle into the reaction kettle, put it into an oven, and react at 80° C. for 48 hours to obtain a colorless flaky crystal Ce-MOF.

[0030] Such as figure 1 As shown, the Ce atom in the metal center of Ce-MOF is nine-coordinated, and each Ce atom is coordinated with nine O atoms, and O comes from five different 5-aminoisophthalic acid ligands and two water molecules,...

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Abstract

The invention discloses a preparation method for a cerium-base metallic organic framework material, an application thereof in Co(II) recognition and a fluorescence detection method. The preparation method comprises the following steps: adding 5-aminoiophthalic acid and 4,4'-(1,3-propylene) bipyridine into water, and then adding cerium nitrate hexahydrate, stirring and reacting under preset temperature for preset reaction time, thereby acquiring the cerium-base metallic organic framework material. The fluorescence detection method for the prepared cerium-base metallic organic framework materialin Co(II) recognition comprises the following steps: gradually dropwise adding the cerium-base metallic organic framework material into a newly prepared 1mmol / L Co(II) ethanol solution till the fluorescence intensity is free from dramatic decline, thereby acquiring a fluorescence quenching rate of Co(II) for the cerium-base metallic organic framework material, and meanwhile, processing and fitting a fluorescence test data, thereby acquiring a working curve and a quenching constant of Co(II). The fluorescence detection method has the advantages of real time detection, simple operation and highsensitivity.

Description

technical field [0001] The invention relates to a preparation method of a cerium-based metal organic framework material, its application in Co(II) identification, and a fluorescence detection method, belonging to the technical field of chemical metal identification. Background technique [0002] Cobalt is an important raw material for the production of heat-resistant alloys, hard alloys, anti-corrosion alloys, magnetic alloys and various cobalt salts. Cobalt-based alloy or cobalt-containing alloy steel is also a variety of high-load heat-resistant parts in chemical equipment and important metal materials in the atomic energy industry. However, excessive cobalt content will cause serious pollution to the atmosphere, water and soil, and lead to cobalt poisoning and even death of humans, animals and plants. Therefore, it is very important to develop a rapid and simple method for the detection of Co(II). At present, except for the traditional chemical reagent detection method, ...

Claims

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Application Information

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IPC IPC(8): C08G83/00C09K11/06G01N21/64
CPCC08G83/008C09K11/06C09K2211/187G01N21/643G01N2021/6432
Inventor 何海燕李磊王梁缘王益斌杜协奥李田雨王国军李伟华
Owner HOHAI UNIV
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