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A preparation method of an electrochemical sensor for detecting polycyclic aromatic hydrocarbons

A technology of polycyclic aromatic hydrocarbons and electrochemistry, which is applied in the direction of electrochemical variables of materials, can solve the problems of no electrochemical activity of polycyclic aromatic hydrocarbons and difficult detection of polycyclic aromatic hydrocarbons, and achieve simple and fast production process, increase movable space, and detection low limit effect

Inactive Publication Date: 2017-12-12
UNIV OF JINAN
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  • Application Information

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Problems solved by technology

However, it is mostly used for the detection of electroactive substances. However, polycyclic aromatic hydrocarbons have no electrochemical activity, so it is difficult to directly detect them by electrochemical methods. Therefore, the detection of polycyclic aromatic hydrocarbons in water systems has always been a difficult problem in electrochemical analysis.

Method used

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  • A preparation method of an electrochemical sensor for detecting polycyclic aromatic hydrocarbons
  • A preparation method of an electrochemical sensor for detecting polycyclic aromatic hydrocarbons
  • A preparation method of an electrochemical sensor for detecting polycyclic aromatic hydrocarbons

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Embodiment 1

[0029] Example 1 A preparation method of an electrochemical sensor for detecting polycyclic aromatic hydrocarbons

[0030] Step 1. Preparation of 2,6-diaminoanthraquinone (2,6-DA) functionalized graphene (GR): Weigh 0.2 g graphene oxide and dissolve in 85 mL SOCl 2 and 4 mL of dry DMF, refluxed at 70°C for 24 h with magnetic stirring to obtain a solid, dissolved the solid in 40 mL of dry DMF, added 0.2 g of 2,6-DA for ultrasonic treatment for 2 h, and added 12 drops of pyridine Stir mechanically at 85°C for 31 h, cool, filter, wash, and dry at 85°C to obtain 2,6-DA-GR as a solid.

[0031] Step 2. Prepare 2,6-DA-Grp / EDOT polymerization base solution; weigh 0.014 g of EDOT solution and 0.039 g of barium perchlorate in 10 mL of acetonitrile and DMF solution with a volume ratio of 1:1, and then add The 2,6-DA-GR prepared in step (1) was ultrasonically treated for 10 min, and then passed through high-purity nitrogen for 15 min to obtain a uniformly dispersed polymerization bottom ...

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Abstract

The invention relates to a preparation method of an electrochemical sensor for detecting polycyclic aromatic hydrocarbons, especially an electrochemical method for detecting polycyclic aromatic hydrocarbons based on 2,6-diaminoanthraquinone functionalized graphene-doped conductive polymer PEDOT composite film modified electrode . An electrochemical sensor for detecting polycyclic aromatic hydrocarbons was obtained by potentiostatic polymerization. The conductive polymer PEDOT is used to fix the electrochemical probe, and 2,6-diaminoanthraquinone is firstly combined with graphene as the electrochemical probe, so that graphene, as a large matrix material, can not only avoid probes during potentiostatic polymerization The needles are tightly packed on the surface of the electrode, and graphene can increase the conductivity of the electrode. The electrochemical sensor based on this material has high sensitivity and low detection limit for the detection of polycyclic aromatic hydrocarbons.

Description

technical field [0001] The invention belongs to the technical field of electrochemical sensors, and in particular relates to a preparation method of an electrochemical sensor for detecting polycyclic aromatic hydrocarbons. Background technique [0002] Polycyclic aromatic hydrocarbons are a class of compounds containing two or more fused aromatic rings, which have strong carcinogenic, teratogenic, and mutagenic effects. Human beings who have been in the environment polluted by PAHs for a long time will have various chronic diseases. Therefore, the research on the detection methods of PAHs has attracted more and more attention from analytical chemists. [0003] At present, the main methods for detecting PAHs include optical fiber sensors, biosensors, chromatography and its combination technology, and spectroscopic technology. Among them, chromatography and its combination technology and biosensor are the most commonly used technologies. The use of chromatography technology...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48
Inventor 郑香丽周长利夏方诠田栋花小霞
Owner UNIV OF JINAN
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