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Method for rapidly screening polychlorinated biphenyl by functionalized graphene polypyrrole modified electrode

A technology of graphene polypyrrole and polychlorinated biphenyls, which is applied in the field of rapid screening of polychlorinated biphenyls with functionalized graphene polypyrrole modified electrodes

Inactive Publication Date: 2015-05-13
UNIV OF JINAN
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  • Application Information

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Problems solved by technology

However, the surface of graphene is in a hydrophobic state, and there is a strong van der Waals force between layers, which makes it easy to aggregate.

Method used

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  • Method for rapidly screening polychlorinated biphenyl by functionalized graphene polypyrrole modified electrode
  • Method for rapidly screening polychlorinated biphenyl by functionalized graphene polypyrrole modified electrode
  • Method for rapidly screening polychlorinated biphenyl by functionalized graphene polypyrrole modified electrode

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Embodiment 1

[0032] A method for rapid screening of polychlorinated biphenyls by functionalized graphene-polypyrrole-modified electrodes, using pyrrole as a conductive polymer, using potentiostatic polymerization to prepare β-CD functionalized Grp-modified GCE, through the probe molecule ferrocene and polychlorinated biphenyls The difference between the host-guest recognition ability of benzene and cyclodextrin, an electrochemical method for the rapid screening of polychlorinated biphenyls in water systems.

[0033] 1 Pyrrole and β-CD functionalized Grp to make a modified electrode, the steps are: take 20 mL of 0.5 mg / mL graphene oxide aqueous solution, add concentrated NH 3 (300 μL), hydrazine hydrate (20 μL) and β-CD (80 mg), then stirred in a water bath at 60°C for 4 h to obtain 0.25 mg / mL β-CD-Grp; pipette 5 mL of the above solution and 6.9 μL of pyrrole , add it to 5.0 mL 0.5 mol / L H 2 SO 4 The dissolved solution was heated to dissolve; after the dissolved solution was passed throu...

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Abstract

The invention relates to the technical field of rapid screening of polychlorinated biphenyl, in particular to an electrochemical method for rapidly screening polychlorinated biphenyl in a water system. According to the electrochemical method, pyrrole is taken as a conductive polymer, beta-cyclodextrin functionalized graphene modified glassy carbon electrode is prepared with a constant potential method, and rapid screening of polychlorinated biphenyl in the water system is realized according to host-guest recognition capability difference of probe molecule ferrocene, polychlorinated biphenyl and cyclodextrin. A preparation process of the modified electrode is simple and convenient, the stability is good, toxicity is avoided, and further, the method effectively reduces disturbance of coexisting substances and has high selectivity and high sensitivity on polychlorinated biphenyl.

Description

technical field [0001] The invention relates to the technical field of rapid screening of polychlorinated biphenyls, in particular to a method of preparing β-cyclodextrin (β-CD) functionalized graphene (Grp) modified glassy carbon by using pyrrole as a conductive polymer and using a potentiostatic polymerization method Electrode (GCE), through the difference in the host-guest recognition ability of probe molecules ferrocene and polychlorinated biphenyls and cyclodextrin, realizes the electrochemical method of rapid screening of polychlorinated biphenyls in water system. Background technique [0002] Polychlorinated biphenyls are a class of biphenyl series organic compounds synthesized by artificially introducing chlorine atoms to replace hydrogen atoms connected to carbon atoms on the benzene ring. Polychlorinated biphenyls are widely used in industrial production and are intermediates in the synthesis of various chemical products. However, due to the relatively stable struc...

Claims

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Application Information

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IPC IPC(8): G01N27/26G01N27/30G01N27/48
Inventor 郑香丽周长利刘姗花小霞夏方诠田栋
Owner UNIV OF JINAN
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