Upconversion luminescent material with amino functional group coated on surface and application thereof in TNT (trinitrotoluene) detection

An amino-functional, luminescent material technology, applied in the field of preparation of up-conversion luminescent materials, can solve problems such as unreported, and achieve the effects of eliminating influence, stable dispersion and high fluorescence intensity

Inactive Publication Date: 2013-02-27
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because its excitation light is in the near-infrared region, it can avoid the absorption quenching of other aromatic nitro compounds, but so far, no up-conversion luminescent materials have been reported for the detection of TNT

Method used

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  • Upconversion luminescent material with amino functional group coated on surface and application thereof in TNT (trinitrotoluene) detection

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Experimental program
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Effect test

Embodiment 1

[0017] a. Prepare Y(NO 3 ) 3 , Yb(NO 3 ) 3 , Er(NO 3 ) 3 Rare earth salt solution; prepare a HCl solution with a concentration of 1mol / L; prepare a NaF solution with a concentration of 1mol / L;

[0018] b. Add 0.1g of polyacrylic acid with a molecular weight of 1790-1810, 15ml of absolute ethanol, and 10mL of ethylene glycol into the reactor, and stir until the solution is uniform; continue to add 1.7ml of Y(NO 3 ) 3 Rare earth salt solution, 200 μl of Yb(NO 3 ) 3 Rare earth salt solution, 100 μl of Er(NO 3 ) 3 Rare earth salt solution, stirred for 10 minutes;

[0019] c. Add 4mL NaF solution to the reaction kettle and stir evenly; finally add 600μl HCl solution to the solution and stir magnetically for 10 minutes;

[0020] d. The reaction kettle was reacted at 190°C for 72 hours, and after natural cooling, it was washed with deionized water by centrifugation, and the product obtained was recorded as NaYF 4 : Yb 3+ -Er 3+ PAA;

[0021] e. Take 150 mg of NaYF pr...

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Abstract

The invention discloses a preparation method of an upconversion luminescent material with amino functional group coated on the surface and application thereof in TNT (trinitrotoluene) detection, belonging to the technical field of nano material preparation. The invention improves the previously reported nano material preparation method, and synthesizes the upconversion luminescent material with amino functional group coated on the surface. The method disclosed by the invention is more simple and easier to operate. The synthesized upconversion luminescent material with amino functional group coated on the surface is monodisperse nanoparticles with uniform size, and has the advantages of stable dispersity in the water phase, high fluorescence intensity and high luminescent stability. The material implements specific recognition on TNT by using the amino functional group, and forms TNT anions to implement obvious quenching on green fluorescence, thereby carrying out high-selectivity high-sensitivity qualitative and quantitative detection on the TNT; and the invention can especially eliminate the influence of trinitrophenol (TNP) on detection.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanometer materials, and in particular relates to a preparation method of an up-conversion luminescent material with amino functional groups wrapped on the surface and its application to TNT detection. 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. 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 TNP, which greatly affects the selectivity of TNT detection. [0003] The up-conversion luminescent material has high fluorescence intensity and stable luminescence, and the ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85C09K11/02G01N21/64
Inventor 汪乐余马英新
Owner BEIJING UNIV OF CHEM TECH
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