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Electrochemical method for highly sensitive detection of polycyclic aromatic hydrocarbons based on go/fe3o4/β-cd magnetic nanocomposite

A composite material and magnetic nanotechnology, applied in the chemical industry, can solve the problems of limited application of chromatographic technology, unsuitability for real-time on-line detection, high equipment requirements, etc., and achieve the effects of good selectivity, detection line width and high sensitivity

Active Publication Date: 2019-02-01
ZUNYI NORMAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the most commonly used method for detecting polycyclic aromatic hydrocarbons is chromatography and its combination technology, which has the advantages of low detection limit and high selectivity, but has high requirements for equipment, is inconvenient to carry, and requires professional and technical personnel to test in the laboratory, so that The large-scale popularization and application of chromatography technology is greatly restricted, and it is not suitable for real-time online detection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A GO / Fe-based 3 o4 / β-CD magnetic nanocomposite high-sensitivity electrochemical method for detecting polycyclic aromatic hydrocarbons, the specific steps are:

[0032] (1) Magnetic nanocomposite GO / Fe 3 o 4 Preparation of:

[0033] Weigh 0.15mol of FeSO 4 ·7H 2 O and 0.15mol FeCl 3 Dissolve 6H2O in water, add 20mg of graphene oxide, sonicate for 30min, pass in argon, heat to 60°C and stir for 40min. Under the condition of strong stirring, add a certain amount of ammonia water drop by drop to the above solution, heat to 60°C and stir for 40 minutes, wash with water and magnetically separate, and dry in vacuum to obtain GO / Fe 3 o 4 ;

[0034] (2) GO / Fe 3 o 4 Preparation of / β-CD magnetic nanocomposites:

[0035] Weigh 40mg (1) of the prepared magnetic nanocomposite GO / Fe 3 o 4 Dissolve in 10mL pure water, weigh 40mg β-CD and dissolve in 10mL deionized water, ultrasonically dissolve, mix the two for reaction, stir vigorously, react at 80°C for 3h, wash with w...

Embodiment 2

[0044] A GO / Fe-based 3 o 4 / β-CD magnetic nanocomposite high-sensitivity electrochemical method for detecting polycyclic aromatic hydrocarbons, the specific steps are:

[0045] (1) Magnetic nanocomposite GO / Fe 3 o 4 Preparation of:

[0046] Take 0.2molFeSO 4 ·7H 2 O and 0.2mol FeCl 3 ·6H 2 O was dissolved in water, graphene oxide was added, ultrasonic treatment was performed for 20 min, helium gas was introduced, and the mixture was heated to 70°C and stirred for 50 min. Under the condition of strong stirring, add a certain amount of ammonia water drop by drop to the above solution, heat to 70°C and stir for 50 minutes, wash with water and magnetically separate, and dry in vacuum to obtain GO / Fe 3 o 4 ;

[0047] (2) GO / Fe 3 o 4 Preparation of / β-CD magnetic nanocomposites:

[0048] Weigh 45mg (1) of the prepared magnetic nanocomposite GO / Fe 3 o 4 Dissolve in 15mL pure water, weigh 45mgβ-CD, dissolve in 15mL deionized water, dissolve with ultrasonic, mix the two ...

Embodiment 3

[0057] A GO / Fe-based 3 o 4 / β-CD magnetic nanocomposite high-sensitivity electrochemical method for detecting polycyclic aromatic hydrocarbons, the specific steps are:

[0058] (1) Magnetic nanocomposite GO / Fe 3 o 4 Preparation of:

[0059] Weigh 0.18mol of FeSO 4 ·7H 2 O and 0.15mol FeCl 3 Dissolve 6H2O in water, add 20mg of graphene oxide, sonicate for 30min, pass in neon gas, heat to 50°C and stir for 50min. Under the condition of strong stirring, add a certain amount of ammonia water drop by drop to the above solution, heat to 70°C and stir for 50 minutes, wash with water and magnetically separate, and dry in vacuum to obtain GO / Fe 3 o 4 .

[0060] (2) GO / Fe 3 o 4 Preparation of / β-CD magnetic nanocomposites:

[0061] Weigh 55mg (1) of the prepared magnetic nanocomposite GO / Fe 3 o 4 Dissolve in 14mL pure water, weigh 55mgβ-CD and dissolve in 12mL deionized water, dissolve with ultrasonic, mix the two for reaction, stir vigorously, react at 65°C for 3.5h, wash...

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Abstract

The invention belongs to the field of chemical industry, and particularly relates to an electrochemical method for detecting polycyclic aromatic hydrocarbon based on the high sensitivity of a GO / Fe3O4 / beta-CD magnetic nanocomposite. In the method, one step in situ method is adopted for synthesizing a magnetic nanocomposite GO / Fe3O4, and then the GO / Fe3O4 / beta-CD nanocomposite is synthesized; based on a subject-object identifying relationship between cyclodextrin (beta-CD) and polycyclic aromatic hydrocarbon, the detection of the polycyclic aromatic hydrocarbon is realized. The method has the advantages of being fast in response, high in sensitivity, high in stability, high in selectivity, wide in detection line and the like.

Description

technical field [0001] The invention belongs to the field of chemical technology, especially based on GO / Fe 3 o 4 Electrochemical method for highly sensitive detection of polycyclic aromatic hydrocarbons using / β-CD magnetic nanocomposites. Background technique [0002] Polycyclic aromatic hydrocarbons belong to the category of persistent organic pollutants, which can migrate over long distances and exist in the environment for a long time. Accumulation leads to more serious harm to advanced organisms. In addition, under the irradiation of ultraviolet light, the risk of light produced by polycyclic aromatic hydrocarbons is greater. When there are long-term polycyclic aromatic hydrocarbon pollutants in our living environment, it is easy to induce a variety of Diseases, mainly skin cancer, lung cancer, rectal cancer, breast cancer and so on. Therefore, it is urgent to develop a new analytical method that is practical, simple, low-cost, and highly operable to detect the cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/416
CPCG01N27/416
Inventor 罗宿星刘焱伍远辉
Owner ZUNYI NORMAL COLLEGE
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