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Luminous metal organic framework material for uranyl ion detection in water and preparation method thereof

A metal-organic framework and uranyl ion technology, which is applied in the field of luminescent metal-organic framework materials and their preparation, achieves the effects of simple preparation, strong selectivity, and good application prospects

Active Publication Date: 2017-05-10
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few reports on metal-organic framework materials for the detection of uranyl ions

Method used

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  • Luminous metal organic framework material for uranyl ion detection in water and preparation method thereof
  • Luminous metal organic framework material for uranyl ion detection in water and preparation method thereof
  • Luminous metal organic framework material for uranyl ion detection in water and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Weigh 2mL of N,N'-dimethylformamide into 10mL of deionized water, add 0.026g of terbium nitrate hexahydrate and 0.035g of 4,4'-biphenyldicarboxylic acid in turn while stirring, add three Ethylamine adjusted the pH of the mixed solution to 7.5, and stirred at room temperature for 30 minutes; then put the mixed solution into a reaction kettle with a polytetrafluoroethylene lining, crystallized at 140°C for 72 hours, cooled naturally to room temperature, filtered, After washing three times with ethanol and drying, the terbium metal-organic framework was obtained. Select a terbium metal-organic framework single crystal with a suitable size, use a German Bruker ApexCCD single crystal X-ray diffractometer, use graphite as a monochromator, and use MoKα Target, the test temperature is (293±2)K, in the range of 1.87°figure 1 .

[0024] The prepared terbium metal-organic framework was dispersed in aqueous solution, which exhibited strong green fluorescence, and the main emiss...

Embodiment 2

[0026] Weigh 4mL of N,N'-dimethylformamide and add it to 12mL of ethylene glycol, then add 0.026g of terbium nitrate hexahydrate and 0.048g of 4,4'-biphenyldicarboxylic acid in turn while stirring, using Adjust the pH of the mixed solution with ammonia water to about 9.0, and stir at room temperature for 10 minutes; then put the mixed solution into a reaction kettle with a polytetrafluoroethylene lining, crystallize at 150°C for 72 hours, cool naturally to room temperature, filter, and use After washing with ethanol three times and drying, the terbium metal-organic framework was obtained; figure 2 As shown, the X-ray powder diffraction peak position of the obtained sample is basically consistent with the peak position simulated by X-ray single crystal diffraction.

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Abstract

The invention provides a luminous metal organic framework material for uranyl ion detection in water and a preparation method thereof. Under the hydrothermal condition or solvent heat condition, the terbium metal iron and organic ligand molecular self-assembly is performed in an auxiliary way through auxiliary agents and pH regulators; a luminous terbium metal organic framework material is synthesized. A terbium metal organic framework provided by the invention has strong green fluorescence; the 491, 545, 585 and 621nm emitting peak intensity is gradually reduced along with the increase of uranyl ion concentration in the water solution; the emitting peak intensity in a position being 338nm can be gradually enhanced along the concentration increase of uranyl irons in the water solution; further, the fast, simple, convenient and high-selectivity detection on the uranyl irons can be realized.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a luminescent metal organic framework material for detecting uranyl ions in water and a preparation method thereof. Background technique [0002] With the rapid development of nuclear power, military, medical and other fields, the demand for uranium and uranium-containing products is increasing. The uranium-containing waste generated during the mining and processing of uranium ore and the use of uranium-containing materials will not only pollute the soil and water resources and environment, but also seriously affect human health and other living organisms. Uranyl ion (UO 2 2+ ) is the main form of uranium in aqueous solution, and its detection research has always attracted people's great attention. Atomic absorption spectroscopy, X-ray fluorescence analysis, inductively coupled plasma spectroscopy, surface-enhanced Raman spectroscopy, cathodic stripping volta...

Claims

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Application Information

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IPC IPC(8): C07F5/00C09K11/06G01N21/64
CPCC07F5/003C09K11/06C09K2211/182G01N21/643
Inventor 叶俊伟宁桂玲拉吉·费伊萨·保格乐张思琦林源
Owner DALIAN UNIV OF TECH
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