Solid contact conducting layer based on magnetic field induction, and solid ion specific electrode

An ion-selective, conductive layer technology, applied in the direction of material analysis, measuring devices, instruments, etc. through electromagnetic means, can solve the problems of complex devices, cumbersome and time-consuming operations, etc., and achieve the effects of easy control, simple operation, and rapid preparation

Inactive Publication Date: 2018-05-01
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of cumbersome and time-consuming operation and complex devices in the existing sol

Method used

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  • Solid contact conducting layer based on magnetic field induction, and solid ion specific electrode
  • Solid contact conducting layer based on magnetic field induction, and solid ion specific electrode
  • Solid contact conducting layer based on magnetic field induction, and solid ion specific electrode

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preparation example Construction

[0032] The invention provides a preparation method of the ion selective electrode, comprising the steps of:

[0033] (1) Using magnetic field-induced self-assembly technology to adsorb magnetic graphene on the electrode surface to prepare a magnetic graphene-modified electrode substrate;

[0034] (2) The surface of the electrode substrate prepared in step (1) is pasted with a polymer sensitive membrane containing an ionophore by tetrahydrofuran, and dried at room temperature to form the ion-selective electrode.

Embodiment 1

[0035] The comparison of the infrared spectrogram of embodiment 1 magnetic graphene, ferric oxide and graphene oxide

[0036] Comparison of infrared spectra of magnetic graphene, ferroferric oxide and graphene oxide, including:

[0037] (1) get about 1mg magnetic graphene, ferroferric oxide and graphene oxide respectively, then add respectively in 100mg potassium bromide powder, compress tablet, put into the mensuration of infrared spectrum in Fourier transform infrared spectrometer; Magnetic graphene is composed of reduced graphene modified by ferric oxide. The preparation method is to weigh 0.225g graphene oxide and disperse it in 62.5ml deionized water. After ultrasonication for 1h, it is mixed with 1.6M FeCl3 and 0.8M The solution of FeSO4 is mechanically stirred and mixed, and the pH of the reaction solution is adjusted by slowly adding ammonia solution = 10, so that the ferric oxide particles are deposited on the graphene oxide sheet, then the reaction solution is heated...

Embodiment 2

[0040] The comparison of the cyclic voltammogram of embodiment 2 magnetic graphene and ferroferric oxide modified electrode matrix and bare gold electrode

[0041] Comparison of cyclic voltammograms of magnetic graphene and Fe3O4-modified electrode substrates with bare gold electrodes, including:

[0042](1) Weigh each 3mg of magnetic graphene and ferroferric oxide solid powder with a balance, and then use magnetic field induction to adsorb on the magnetic gold plate electrode respectively, that is, the electrode substrate and ferric ferric oxide modified by magnetic graphene are obtained. Modified electrode substrate;

[0043] (2) The magnetic graphene-modified electrode substrate obtained in step (1), the ferroferric oxide-modified electrode substrate and the bare gold electrode were respectively used as working electrodes, Ag / AgCl (3M KCl) was used as a reference electrode, and platinum wire was used as an auxiliary electrode. Electrode, connect the three-electrode system ...

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Abstract

The invention relates to a solid contact conducting layer based on magnetic field induction, and a solid ion specific electrode, belonging to the technical field of electrochemical sensors. The solidion specific electrode comprises a substrate, the solid contact conducting layer and a polymer sensitive membrane containing an ion carrier, wherein the solid contact conducting layer is solid powderymagnetic graphene adsorbed onto the surface of the substrate of the electrode in virtue of magnetic field induction. The magnetic graphene solid contact conducting layer in the electrode is preparedfrom a solid powdery substance through magnetic-field-induced self-assembling, so no solution is used; and operation is simple and preparation is fast and easily controllable. The solid ion specific electrode containing the solid contact conducting layer prepared through magnetic-field-induced self-assembling has good potential stability and repeatability; and a novel thinking is provided for development of solid ion specific electrode.

Description

technical field [0001] The invention relates to the technical field of electrochemical sensors, in particular to a solid contact conductive layer induced by a magnetic field and a solid ion selective electrode. Background technique [0002] A solid-state ion-selective electrode is usually composed of three parts: an electrode substrate, a solid contact conductive layer, and an ion-selective sensitive membrane. and hydrophobicity, thereby improving the potential stability and reproducibility of solid-state ion-selective electrodes. The reported solid contact conductive layers include conductive polymers, carbon-based nanomaterials, noble metal nanoparticles, etc. The use of these materials has significantly improved the potential stability and reproducibility of solid-state ion-selective electrodes. However, most of these solid contact conductive layers are prepared by physical drop coating or electrochemical deposition. The former is cumbersome and time-consuming, and the t...

Claims

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Application Information

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IPC IPC(8): G01N27/333
CPCG01N27/333
Inventor 尹坦姬秦伟姜晓晶
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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