Multifunctional nano composite ball and application of nano composite ball to detection and separation of TNT (Trinitrotoluene)

A nano-composite and multi-functional technology, which can be used in material excitation analysis, magnetism of organic materials/organic magnetic materials, fluorescence/phosphorescence, etc. Fast and easy separation and enrichment, good dispersion and stability

Inactive Publication Date: 2013-05-22
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used fluorescent materials, such as organic dyes and quantum dots, cannot distinguish the interference of other aromatic nitro explosives, which greatly affects the selectivity of TNT detection

Method used

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  • Multifunctional nano composite ball and application of nano composite ball to detection and separation of TNT (Trinitrotoluene)

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] a. Weigh 70mg PSI OAm , 5mg of Fe with a particle size of 10-15nm 3 o 4 Magnetic nanoparticles, 10mg LaF 3 : Ce 3+ -Tb 3+ After the fluorescent nanomaterials and 1.0mL chloroform are mixed evenly, pour into 10mL NaOH (0.07mg / mL) solution, and ultrasonically mix the two phases evenly;

[0018] b. Heating in a water bath at 60°C for 2 hours, stirring continuously to volatilize the chloroform, cooling the solution naturally to room temperature, centrifuging, and dispersing the product in 15 mL of deionized water to obtain multifunctional nanocomposite spheres.

[0019] above LaF 3 : Ce 3+ -Tb 3+ Fluorescent nanomaterials are rare earth doped fluorides with a particle size of 10-20nm, among which LaF 3 as the matrix material, Ce 3+ The doping amount is 5 mole percent, Tb 3+ The molar percentage of the doping amount is 5%.

[0020] PSI OAm The preparation method is: dissolve 1.6g polysuccinimide in 32mL tetrahydrofuran at 60°C, then add 1.63mL oleic acid, react t...

Embodiment 2

[0022] a. Weigh 70mg PSI OAm , 5mg of Fe with a particle size of 5-10nm 3 o 4 After mixing magnetic nanoparticles and 1.0mL chloroform evenly, pour into 10mL NaOH (0.07mg / mL) solution, and ultrasonically mix the two phases evenly;

[0023] b. Heating in a water bath at 60°C for 2 hours, stirring continuously to volatilize the chloroform, cooling the solution naturally to room temperature, centrifuging, and dispersing the product in 15 mL of deionized water to obtain multifunctional nanocomposite spheres.

[0024] PSI OAm The preparation method is: dissolve 1.6g polysuccinimide in 32mL tetrahydrofuran at 60°C, then add 1.63mL oleic acid, react the mixture at 100°C for 5h, cool to room temperature, precipitate the reaction product with 80mL methanol, and centrifuge Separation to get PSI OAm ; Polysuccinimide molecular weight range 6000.

Embodiment 3

[0026] a. Weigh 70mg PSI OAm , 10mg LaF 3 : Ce 3+ -Tb 3+ After the fluorescent nanomaterials and 1.0mL chloroform are mixed evenly, pour into 10mL NaOH (0.07mg / mL) solution, and ultrasonically mix the two phases evenly;

[0027] b. Heating in a water bath at 60°C for 2 hours, stirring continuously to volatilize the chloroform, cooling the solution naturally to room temperature, centrifuging, and dispersing the product in 15 mL of deionized water to obtain multifunctional nanocomposite spheres.

[0028] above LaF 3 : Ce 3+ -Tb 3+ Fluorescent nanomaterials are rare earth doped fluorides with a particle size of 10-20nm, among which LaF 3 as the matrix material, Ce 3+ The molar percentage of the doping amount is 5%, Tb 3+ The molar percentage of the doping amount is 5%.

[0029] PSI OAm The preparation method is: dissolve 1.6g polysuccinimide in 32mL tetrahydrofuran at 60°C, then add 1.63mL oleic acid, react the mixture at 100°C for 5h, cool to room temperature, precipit...

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Abstract

The invention discloses a preparation method of a multifunctional nano composite ball, which belongs to the technical field of detection and application of an aromatic nitryl explosive. The prepared spherical multifunctional nano composite ball is uniform in size, is about 150nm in diameter, has both fluorescence and magnetism, has good selectivity to TNT (Trinitrotoluene), and is a novel nano sensor. The preparation method is based on an improvement of a conventional reported preparation method, and is simpler and easier to operate. The multifunctional nano composite ball is good in dispersibility and stability in water phase. According to the change of the fluorescence intensity of the multifunctional nano composite ball before and after the nano composite ball acts on TNT, the qualitative and quantitative detection on TNT is realized, and the sensitivity is high; and based on the magnetism of the multifunctional nano composite ball, the separation and enrichment are rapider and simpler by magnetic separation, and other aromatic nitryl explosives are effectively separated from the composite ball so as to eliminate interference.

Description

technical field [0001] The invention belongs to the technical field of detection and application of aromatic nitro explosives, and in particular relates to a multifunctional nanocomposite ball and its application for detecting and separating TNT. technical background [0002] So far, many TNT detection methods, such as LC-MS, GC-MS, HPLC, solid-phase microextraction and surface-enhanced Raman spectroscopy, have been developed rapidly, but these methods require complex instruments and are expensive to detect. The fluorescence detection method is widely used in the field of explosive molecular detection because of its high sensitivity and simple method. Commonly used fluorescent materials, such as organic dyes and quantum dots, cannot distinguish the interference of other aromatic nitro explosives, which greatly affects the selectivity of TNT detection. Contents of the invention [0003] The object of the present invention is to provide a multifunctional nanocomposite ball ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/14C08L79/08C08K3/16C08K3/22C09K11/85H01F1/42G01N21/64
Inventor 汪乐余马英新
Owner BEIJING UNIV OF CHEM TECH
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