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use eu 2+ A Method for Detecting Explosive TNP by f-f Transition Spectroscopy

A technology of f-f and explosives, applied in fluorescence/phosphorescence, measuring devices, material analysis through optical means, etc., can solve the problems of bulky, expensive chromatographic equipment, complicated operation, etc., and achieve simple detection methods, good detection results, Effects that are easy to scale

Active Publication Date: 2021-04-20
DALIAN NATIONALITIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Trinitrophenol (TNP) is a class of dangerous explosives, which has a negative impact on the environment, so it is particularly important for the detection and analysis of trace explosives. At present, the methods for explosives detection mainly include chromatography, ion migration method, pull Mann spectroscopy and biosensing technology, among which chromatography has the disadvantages of expensive and cumbersome equipment and complicated operation
Rare earth down-converting luminescent nanomaterials have been widely used in the field of biomarkers, but there are few reports in the field of explosive detection

Method used

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  • use eu <sup>2+</sup> A Method for Detecting Explosive TNP by f-f Transition Spectroscopy
  • use eu <sup>2+</sup> A Method for Detecting Explosive TNP by f-f Transition Spectroscopy
  • use eu <sup>2+</sup> A Method for Detecting Explosive TNP by f-f Transition Spectroscopy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] BaAlF 5 : Eu 2+ Preparation of nanoparticles

[0020] 1. Weigh 2mmolAlCl 3 ·6H 2 O, 1.92 mmol BaCl 2 ·6H 2 O, 0.08mol EuCl 2 Dissolve 10mL of distilled water in a 50mL beaker, add a rotor to the beaker, place the beaker on a magnetic stirrer and stir for 20min to fully dissolve to obtain a mixed solution ①.

[0021] 2. Weigh 2mmol NH 4 HF 2 Dissolve in 5mL distilled water, and slowly drop it into the mixed solution ① after fully dissolved, and stir for 20min to obtain the mixed solution ②.

[0022] 3. Transfer the mixed solution ② to a 25mL reactor and heat at 200°C for 24h.

[0023] 4. After taking out the reaction kettle, after cooling to room temperature, centrifuge at a speed of 5000rpm / min for 10 minutes, discard the supernatant, and wash the precipitate with distilled water 4 times. After drying, carry out component analysis, by XRD pattern image 3 (a) It can be seen that pure phase BaAlF has been obtained 5 : Eu 2 + Nanoparticles.

[0024] BaAlF ...

Embodiment 2

[0028] BaSiF 6 :Eu 2+ Preparation of nanoparticles

[0029] 1. Weigh 2g CTAB and dissolve it in a mixed solution of 50mL cyclohexane and 2mL n-butanol. After magnetically stirring in a water bath at 60°C for 30min, the solution turns light yellow and transparent. Two copies of the same solution are prepared.

[0030] 2. Dissolve 1mLBaCl 2 (1mol / L) and citric acid (CA) mixed solution and 1mLH 2 SiF 6 (10%) and CA mixed solutions were added to the two solutions obtained in step 1, and the stirring was continued for 30 min.

[0031] 3. The two solutions were mixed, stirred vigorously at room temperature for 1 hour, then transferred to a 100 mL reactor and heated at 120°C for 12 hours.

[0032] 4. After taking out the reaction kettle, after cooling to room temperature, centrifuge at 9000rpm / min for 10 minutes, discard the supernatant, and wash the precipitate 4 times with ethanol and distilled water. Composition analysis after drying, from the XRD pattern image 3 (b) It c...

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Abstract

The present invention provides the use of Eu 2+ The method for detecting explosive TNP by f‑f transition spectroscopy is based on amino-modified rare earth Eu 2+ Nanoparticle-doped downconversion nanomaterials for explosives detection. Under the excitation of 258 nm ultraviolet light, using Eu 2+ The fluorescence intensity of the f‑f transition at 360 nm generated in the host material and the energy resonance transfer of TNP formation at 360 nm are significant for Eu 2+ Measurement of fluorescence intensity at 360 nm enables quantitative detection of the concentration of explosive TNP. Eu 2+ The f‑f transition spectrum can show stable and good detection results in the detection of explosive TNP, and can quickly and efficiently determine the concentration of explosives in real time. The detection method is simple and easy to popularize.

Description

technical field [0001] The present invention relates to the use of Eu 2+ Detection of the explosive TNP by f–f transition spectroscopy. Background technique [0002] Trinitrophenol (TNP) is a class of dangerous explosives, which has a negative impact on the environment, so it is particularly important for the detection and analysis of trace explosives. At present, the methods for explosives detection mainly include chromatography, ion migration method, pull Mann spectroscopy and biosensing technology methods, among which chromatography has the disadvantages of expensive and cumbersome equipment and complicated operations. The ion mobility method has complex operation, large error and low detection limit. The spectrum of Raman spectroscopy is weak, it is easily disturbed by the outside world, and the detection result is unstable. The biosensing technology method is greatly disturbed by the outside world, and the error is relatively high. Therefore quick, convenient, stabl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
CPCG01N21/643
Inventor 华瑞年张璇刘力涛那立艳张伟
Owner DALIAN NATIONALITIES UNIVERSITY
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