Preparation method of dye functional magnetic nano material and application in fluorescent sensing and magnetic separation of TNT

A technology of magnetic nano and nano materials, applied in material excitation analysis, chemical instruments and methods, material analysis by optical means, etc., can solve the problems of small adsorption capacity, weak mass transfer ability, and non-selective adsorption, etc. Low cost, convenient regeneration method, and easy-to-achieve effect of reaction conditions

Active Publication Date: 2015-05-27
中科润蓝环保技术(北京)股份有限公司
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Problems solved by technology

Nanomaterials have strong adsorption capacity due to their large specific surface area, but their adsorption is not selective and their adsorption capacity is small; TNT imprinted polymers have good selective adsorption capacity for TNT, but most of the "imprinted holes" "Located inside the polymer, the mass transfer ability is weak, and the preparation of the imprinted polymer is difficult to control, which limits the scope of application of this method

Method used

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  • Preparation method of dye functional magnetic nano material and application in fluorescent sensing and magnetic separation of TNT
  • Preparation method of dye functional magnetic nano material and application in fluorescent sensing and magnetic separation of TNT
  • Preparation method of dye functional magnetic nano material and application in fluorescent sensing and magnetic separation of TNT

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Embodiment 1

[0030] In this example, dye-functionalized magnetic nanomaterials were prepared according to the following steps:

[0031] (1) Weigh 4.0 mmol of iron oleate complex and 20 ml of oleylamine into a 100 ml flask, add 6 ml of oleic acid and heat to 120° C., stir until the iron oleate complex dissolves to obtain a mixed solution;

[0032] (2) The temperature of the mixed solution was raised to 200°C, dehydrated with nitrogen and kept for 2 hours, then the temperature of the solution was continued to be raised to 300°C, and kept for 2 hours;

[0033] (3) naturally cool to room temperature, filter to obtain the precipitate, and then wash with deionized water and absolute ethanol for 3 to 5 times;

[0034] (4) placing the precipitate in a vacuum drying oven and drying at a temperature of 50° C. for 6 hours to obtain ferric oxide nanomaterials coated with oleic acid;

[0035] (5) 2-ethylamine phosphate is dissolved in anhydrous ethyl ether to obtain a mass concentration of 5% 2-ethyla...

Embodiment 2

[0043] (1) Weigh 6 millimoles of iron oleate complex and 40 ml of oleylamine into a 100 ml flask, add 15 ml of oleic acid and heat to 120°C, stir until the iron oleate complex dissolves to obtain a mixed solution;

[0044] (2) The temperature of the mixed solution was raised to 200°C, dehydrated with nitrogen and kept for 2 hours, then the temperature of the solution was continued to be raised to 320°C, and kept for 2 hours;

[0045] (3) naturally cool to room temperature, filter to obtain the precipitate, and then wash with deionized water and absolute ethanol for 3 to 5 times;

[0046] (4) placing the precipitate in a vacuum drying oven and drying at a temperature of 60° C. for 6 hours to obtain ferric oxide nanomaterials coated with oleic acid;

[0047] (5) 2-ethylamine phosphate is dissolved in anhydrous ethyl ether to obtain a mass concentration of 4% 2-ethylamine phosphate ether solution, and the ferric oxide nanomaterial coated with oleic acid is dispersed in amine 2-ph...

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Abstract

The invention discloses a preparation method of a dye functional magnetic nano material and application in fluorescent sensing and magnetic separation of TNT. The preparation method comprises the following steps of firstly, reacting a ferric oleate complex with oleylamine in oleic acid so as to obtain an oleic acid coated ferroferric oxide nano material; then dispersing the oleic acid coated ferroferric oxide nano material into a diethyl ether solution of 2-ethylamine phosphate to complete ligand exchange so as to obtain a 2-ethylamine phosphate coated ferroferric oxide nano material; and finally reacting with fluorescein isocyanate so as to obtain a target product. The dye functional magnetic nano material can be used for sensing and removing the trace TNT in a polluted water sample, and has the reproducibility.

Description

technical field [0001] The invention belongs to the technical field of nano-material preparation, and relates to a preparation method of a nano-material capable of reproducible fluorescence sensing and magnetic separation of TNT high-explosives. Background technique [0002] Due to the biological persistence, toxicity and mutagenicity of TNT, the pollution of soil, atmosphere and groundwater by TNT has become a public topic. Reports show that people or animals exposed to TNT atmosphere for a long time will cause serious damage to the nervous system, kidney, liver and other tissues; in addition, it has other toxic side effects including leukocytosis, peripheral neuritis, cardiac arrhythmia and Bladder tumors, etc. Therefore, it is particularly important to develop highly sensitive methods for selective sensing and removal of TNT. [0003] At present, the analysis of TNT mainly focuses on the development of highly sensitive sensing methods to understand the specific concentr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30B01J20/34G01N21/64
CPCB01J20/06B01J20/22B01J20/28009B01J20/3475G01N21/643
Inventor 邹文生王亚琴
Owner 中科润蓝环保技术(北京)股份有限公司
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