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Detection method for picric acid by using crocodile-skin-shaped fluorescent nano fibers

A fluorescent nanofiber, crocodile skin-like technology is applied in the detection of picric acid by "crocodile skin-like" fluorescent nanofibers and the detection of explosives, which can solve the problems of short fluorescence sensitivity and short response time, and achieve low cost and response speed. Fast, highly sensitive results

Active Publication Date: 2015-12-30
NANJING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

This "alligator-like" fluorescent nanofiber sensor exhibits high fluorescence sensitivity and very short response time for the detection of picric acid (PA) in aqueous solution, which has never been reported in the literature

Method used

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  • Detection method for picric acid by using crocodile-skin-shaped fluorescent nano fibers
  • Detection method for picric acid by using crocodile-skin-shaped fluorescent nano fibers
  • Detection method for picric acid by using crocodile-skin-shaped fluorescent nano fibers

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specific Embodiment approach

[0026] Step 1: preparing a P(VDF-HFP) solution and a chloroform solution of TPE-2pTPA, and then mixing the two to prepare a TPE-2pTPA / P(VDF-HFP) solution;

[0027] Acetone (Acetone, Act) and N, N-dimethylacetamide (Dimethylacetamide, DMAC) are mixed in the ratio of 7:3 by volume, obtain mixed solvent, then P (VDF-HFP) and mixed solvent are mixed with 13: Mix at a mass ratio of 87, stir and dissolve at 50°C for 12 hours (hours) to obtain a P(VDF-HFP) solution;

[0028] Dissolve 0.2g of TPE-2pTPA in 1mL of chloroform solution to obtain a nearly saturated solution of TPE-2pTPA;

[0029] Prepare the TPE-2pTPA / P (VDF-HFP) solution with a series of different mass fractions such as 5%, 10%, 15% and 20% by the two solutions according to different mass ratios, and prepare TPE-2pTPA / P (VDF-HFP) with a mass fraction of 5%. In P(VDF-HFP) solution, the mass ratio of TPE-2pTPA to P(VDF-HFP) is 5:95, and when TPE-2pTPA / P(VDF-HFP) solution with a mass fraction of 10% is prepared, TPE-2pTPA a...

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Abstract

The invention discloses a detection method for picric acid by using crocodile-skin-shaped fluorescent nano fibers. The detection method comprises the following steps: step 1, preparing a P(VDF-HFP) solution and a TPE-2pTPA chloroform solution, then mixing the two solutions to prepare a TPE-2pTPA / P(VDF-HFP) solution; step 2, storing the TPE-2pTPA / P(VDF-HFP) solution in a low-temperature environment in a refrigerator for seven days; step 3, electrostatically spinning the processed TPE-2pTPA / P(VDF-HFP) solution to prepare a crocodile-skin-shaped TPE-2pTPA / P(VDF-HFP) nano fibrous membrane; step 4, gradually dropwise adding a PA solution in different concentrations into the crocodile-skin-shaped TPE-2pTPA / P(VDF-HFP) nano fibrous membrane, and detecting the picric acid. The method is simple to operate, low in cost, high in sensitivity and high in response speed and also has the unique advantages of safety, non-toxicity, no pollution to the environment, economical property, applicability and the like.

Description

technical field [0001] The invention relates to the field of explosive detection technology and electrospinning technology, in particular to a method for detecting picric acid by "crocodile skin-like" fluorescent nanofibers. Background technique [0002] 2,4,6-Trinitrophenol (commonly known as picric acid, PA) is an important organic chemical raw material, which is widely used in the production of leather, pharmaceuticals, yellow dyes and preservatives (NiuQ, GaoK, LinZ, etal.Amine-cappedcarbondotsasananosensorforsensitiveandselectivedetectionofpicricacidinaqueoussolutionviaelectrostaticinteraction[J].AnalyticalMethods,2013,5(21):6228-6233.). But at the same time, picric acid is also a common explosive and a typical pollutant, which has prominent public safety threats and ecological damage, and is also a potential carcinogen (KumarS, VenkatramaiahN, PatilS. FluorantheneBasedDerivativesforDetectionofTraceExplosiveNitroaromatics[J]. , 2013, 117(14):7236-7245.). Therefore, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 叶尚辉刘丽萍周舟杨敏黄维
Owner NANJING UNIV OF POSTS & TELECOMM
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