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Ionic liquid/surfactant modified glassy carbon electrode and its preparation method and application

A surfactant and ionic liquid technology, applied in the field of electroanalytical chemistry, can solve the problems of unsatisfactory preparation process and stability, and achieve the effects of avoiding modification errors, uniform film, and simple preparation process

Inactive Publication Date: 2016-03-09
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In recent years, nanomaterials, self-assembled films, polymer films, etc. have been successfully prepared electrochemical sensors and applied to the detection of bisphenol A, but their preparation process and stability are not very satisfactory.

Method used

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  • Ionic liquid/surfactant modified glassy carbon electrode and its preparation method and application
  • Ionic liquid/surfactant modified glassy carbon electrode and its preparation method and application
  • Ionic liquid/surfactant modified glassy carbon electrode and its preparation method and application

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Embodiment 1

[0026] Electrochemical Behavior of Bisphenol A on Ionic Liquid / Surfactant Modified Glassy Carbon Electrode

[0027] Under the conditions of controlling the potential range of -1.0-1.0V, scanning rate of 0.1V / s, and supporting electrolyte PBS buffer solution pH=8.0, the activity of bisphenol A on bare glassy carbon electrodes and modified glassy carbon electrodes was investigated by cyclic voltammetry. electrochemical behavior, figure 2 It is the cyclic voltammetry characteristic curve of bisphenol A on the ionic liquid / surfactant modified glassy carbon electrode and the bare glassy carbon electrode. It can be seen from the figure that there is only one oxidation of bisphenol A on the bare glassy carbon electrode and the modified glassy carbon electrode. peak, no reduction peak, the electrochemical response of bisphenol A on the bare glassy carbon electrode is very weak, but on the modified glassy carbon electrode, the peak type of the oxidation peak is obvious, and the peak c...

Embodiment 2

[0029] The effect of functionalized ionic liquid, surfactant, and the ratio of functionalized ionic liquid and surfactant on the electrochemical behavior of the modified electrode was explored by univariate method. The detection conditions were scan rate 0.1V / s, potential window -1.0 V-1.0V, supporting electrolyte 0.1MpH=8.0 PBS buffer solution, find out the electrode preparation conditions with the highest detection sensitivity of bisphenol A, wherein the molar concentration of surfactant cetyltrimethylammonium bromide is 1×10 -5 -5×10 -3 mol / L, functionalized ionic liquid [C n mim] BF 4 The amount used is 10-30 μL, and the volume ratio of the functionalized ionic liquid to the surfactant is 1:1-3, preferably 2:3.

Embodiment 3

[0031] Using the modified electrode prepared by the present invention as the working electrode, explore the best experimental conditions for bisphenol A detection, including scanning speed, supporting electrolyte composition, detection potential window and enrichment time, etc., by comparing the peak current of bisphenol A oxidation under different conditions and oxidation peak potential to determine the best conditions for bisphenol A detection.

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Abstract

The invention discloses an ionic liquid / surface active agent modified glassy carbon electrode as well as a preparation method and application thereof. According to the technical scheme, the ionic liquid / surface active agent modified glassy carbon electrode is characterized in that the surface of the glassy carbon electrode is modified by a functional ionic liquid / surface active agent composite film, wherein functional ionic liquid is 1-decyl-3-methylimidazole tetrafluoroborate (C(n)mim) BF4, and the carbon number n of an alkyl chain is equal to 6, 8, 10 or 12; a surface active agent is hexadecyl trimethyl ammonium bromide. The invention also discloses the preparation method of the ionic liquid / surface active agent modified glassy carbon electrode and the application of the ionic liquid / surface active agent modified glassy carbon electrode to preparation of an electrochemical sensor for detecting bisphenol A. The glassy carbon electrode is high in detection sensitivity, and an electrochemical method which is rapid and sensitive and is good in reproducibility is set up for the quantitative determination on bisphenol A.

Description

technical field [0001] The invention belongs to the technical field of electroanalytical chemistry, and in particular relates to an ionic liquid / surfactant modified glassy carbon electrode and a preparation method and application thereof. Background technique [0002] The chemical name of bisphenol A (Bisphenol A, BPA) is 2,2-bis (4-hydroxyphenyl) propane (2,2-bis (4-hydroxyphenyl) propane), referred to as diphenol propane, and the molecular formula is C 15 h 16 o 2 . Bisphenol A is an important organic chemical raw material and one of the most widely used industrial compounds in the world. Industrially, bisphenol A is generally produced by condensation of phenol and acetone in acidic medium. It can also be prepared by condensation of phenol and acetone in the presence of mercaptoacetic acid, chloroacetic acid, barium hydroxide and other catalysts or ion exchange resins. Bisphenol A is the main raw material for the production of various polymer materials such as epoxy re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/26
Inventor 卓克垒刘丽红王春风陈玉娟孙东闫崇徐攀攀王之俊
Owner HENAN NORMAL UNIV
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