Fabrication of two-dimensional Cu-Mof nanosheets and their application in fluorescence detection of TNP

A fluorescence detection and nanosheet technology, applied in the field of fluorescence detection, can solve the problems of less TNP measurement, expensive use, and inconvenient portability, and achieve the effects of easy storage, good stability, and accelerated fluorescence quenching

Active Publication Date: 2021-11-12
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, on-site monitoring of high-energy explosives usually uses police dogs or expensive, complicated, and inconvenient precision instruments
It is worth pointing out that although TNP has stronger explosive power than TNT, and is widely used in the manufacture of rocket fuel, paint, pyrotechnics, matches, glass, leather, etc., the determination of TNP has attracted less attention.

Method used

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  • Fabrication of two-dimensional Cu-Mof nanosheets and their application in fluorescence detection of TNP
  • Fabrication of two-dimensional Cu-Mof nanosheets and their application in fluorescence detection of TNP
  • Fabrication of two-dimensional Cu-Mof nanosheets and their application in fluorescence detection of TNP

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Take a 50mL beaker, add 40mL of ultrapure water, and dissolve 0.02g of copper chloride and 0.1g of polyvinylpyrrolidone in the ultrapure water. Weigh 0.2 mol of sodium hydroxide and dissolve it in 2.5 mL of ultrapure water to obtain an aqueous solution of sodium hydroxide. Weigh 0.1 mol of ascorbic acid and dissolve it in 2.5 mL of ultrapure water to obtain an aqueous solution of ascorbic acid. Add aqueous sodium hydroxide solution dropwise to the beaker at a rate of 10 μL / s. After the addition is complete, continue stirring for 5 minutes. Continue stirring for 5 minutes and centrifuge to obtain the first product. Wash the first product twice with ethanol solution (analytical pure) to obtain yellow cuprous oxide cubes. Disperse the cuprous oxide cubes in 10 mL of ethanol to obtain a mixed solution. Completely dissolve 0.05 mmol of 2-aminoterephthalic acid in 10 mL of N,N-dimethylformamide to obtain an organic phase solution. Add the mixed solution into the organic phas...

Embodiment 2

[0040] According to the mass ratio of 1:6, take copper chloride and polyvinylpyrrolidone respectively, then take aqueous sodium hydroxide solution and ascorbic acid aqueous solution, the mass ratio of sodium hydroxide contained in copper chloride and aqueous sodium hydroxide solution is 10:1, hydrogen The concentration ratio of sodium oxide aqueous solution to ascorbic acid aqueous solution is 2 to 2.2; completely dissolve copper chloride and polyvinylpyrrolidone in ultrapure water, and then add hydroxide dropwise at a rate of 40 μL / s under magnetic stirring conditions. Sodium aqueous solution, after the addition is complete, continue magnetic stirring for 8 minutes, then, under the condition of magnetic stirring, add ascorbic acid aqueous solution dropwise at a rate of 20 μL / s, after the addition is complete, continue magnetic stirring for 8 minutes, and centrifuge to obtain the first product , ethanol solution (analytically pure) washed the first product three times to obtain...

Embodiment 3

[0042] According to the mass ratio of 1:5.5, take copper chloride and polyvinylpyrrolidone respectively, then take aqueous sodium hydroxide solution and ascorbic acid aqueous solution, the mass ratio of sodium hydroxide contained in copper chloride and aqueous sodium hydroxide solution is 9.25:1, hydrogen The concentration ratio of sodium oxide aqueous solution to ascorbic acid aqueous solution is 2 to 1.6; completely dissolve copper chloride and polyvinylpyrrolidone in ultrapure water, and then add hydroxide dropwise at a rate of 35 μL / s under the condition of magnetic stirring. Sodium aqueous solution, after the addition is complete, continue magnetic stirring for 6.5 minutes, then, under the condition of magnetic stirring, add ascorbic acid aqueous solution dropwise at a rate of 15 μL / s, after the addition is complete, continue magnetic stirring for 7 minutes, and centrifuge to obtain the first product , ethanol solution (analytically pure) washed the first product at least ...

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Abstract

The invention discloses the preparation of a two-dimensional Cu-MOF nanosheet and its application in fluorescence detection of TNP. Copper chloride and polyvinylpyrrolidone are completely dissolved in ultrapure water, and sodium hydroxide aqueous solution is added dropwise. Add ascorbic acid aqueous solution drop by drop, centrifuge to obtain the first product, wash to obtain cuprous oxide nanocubes; disperse cuprous oxide nanocubes in ethanol solution to obtain a mixed solution; 2-aminoterephthalic acid is completely dissolved in N,N ‑dimethylformamide to obtain an organic phase solution; the mixed solution was added to the organic phase solution, left to stand, and centrifuged to obtain the second product, washed, solvent removed, and dried to obtain a two-dimensional Cu‑MOF nanosheet. The nanosheet is applied to the fluorescence detection of TNP. The nanosheet synthesized by the solvothermal method has ultra-thin thickness, directional growth and excellent crystallinity. The nanosheet fluorescent probe has good stability, is easy to store, and has good selectivity to TNP.

Description

technical field [0001] The invention belongs to the technical field of fluorescence detection, and relates to a preparation method of a two-dimensional Cu-MOF nanosheet; the invention also relates to the application of the fluorescent probe in the fluorescence detection of TNP. Background technique [0002] Rapid, highly sensitive, and highly selective determination of high-energy explosives has become one of the most pressing issues in national security, military applications, forensic investigations, and mine analysis. 2,4,6-Trinitrophenol (TNP), also known as picric acid, is mainly used in explosives, acid dyes, fireworks, pesticides, glass and leather industries. TNP is highly toxic and will cause certain damage to the soil and water environment. Moreover, it will enter the human body through the mouth, nose, and skin contact, causing chronic poisoning, and in severe cases, it will cause terminal neuritis, bladder irritation, and liver and kidney damage. Therefore, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C09K11/06G01N21/64
CPCC08G83/008C09K11/06C09K2211/188G01N21/643G01N2021/6432
Inventor 陈晶张茜徐方红胥亚丽李淑英卢小泉
Owner NORTHWEST NORMAL UNIVERSITY
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