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Solid-state ion selective electrode based on single-walled carbon nanohorn electrode and preparation method thereof

A single-walled carbon nanohorn and ion-selective technology, applied in nanotechnology for sensing, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as poor sensitivity and slow electron conduction rate , to achieve the effect of low cost and simple preparation

Inactive Publication Date: 2018-04-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional carbon materials such as graphite, glassy carbon, etc. have slow electron conduction rates, and the coated electrodes based on these materials as substrates have poor sensitivity.

Method used

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  • Solid-state ion selective electrode based on single-walled carbon nanohorn electrode and preparation method thereof
  • Solid-state ion selective electrode based on single-walled carbon nanohorn electrode and preparation method thereof
  • Solid-state ion selective electrode based on single-walled carbon nanohorn electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 Preparation of Single-Walled Carbon Nanohorn Modified Electrode Substrate

[0039] Dimethylformamide (DMF) dispersion of single-walled carbon nanohorns is dropped on the surface of a glassy carbon electrode (or screen-printed electrode), and dried at room temperature (or infrared lamp) to prepare the required single-walled carbon nanohorns. Modified electrodes.

[0040] The concentration of the single-wall carbon nanohorn in the dispersion liquid is 2 mg / ml; the volume of the single-wall carbon nanohorn dispersion liquid in dimethylformamide is 6-8 μL.

[0041] Single-walled carbon nanohorns can be prepared using existing technologies, for example, can be prepared by referring to the literature using arc discharge method (Nan Li, Zhiyong Wang, Keke Zhao, Zujin Shi, Zhennan Gu, Shukun Xu, Carbon, 2010, 4, 1580-1585.).

Embodiment 2

[0042] Example 2 Preparation of single-wall carbon nanohorn carbon paste electrode substrate

[0043] mixing single-walled carbon nanohorn powder with paraffin oil, triphenylamine or ionic liquid at a mass ratio of 7:3, and thoroughly grinding to obtain a uniform mixture;

[0044] The mixture is stuffed into a clean electrode sleeve and compacted, and a copper wire is inserted behind the electrode as a wire to prepare the desired carbon paste electrode.

Embodiment 3

[0045] The preparation of embodiment 3 calcium ion selective electrodes

[0046] (1) According to the method of Example 1, a single-walled carbon nanohorn modified electrode was prepared (with a glassy carbon electrode as the substrate);

[0047] (2) Drop 100 μL of calcium ion polymer film solution on the surface of the electrode base surface modified with single-walled carbon nanohorns prepared above, and dry at room temperature for 24 hours;

[0048] The calcium ion polymer membrane solution is composed of calcium ionophores, polymers, plasticizers, lipophilic macromolecules and solvents;

[0049] The calcium ionophore is N, N, N', N'-tetrakis[cyclohexyl] diglycol acid diamide, based on the total mass of the solute, the mass percentage concentration of the calcium ionophore is 1%;

[0050] Polymer is polymethyl methacrylate, based on the total mass of solute, the mass percent concentration of polymer is 33%;

[0051] Plasticizer is butyl phthalate, based on the total mass of...

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Abstract

The invention discloses a solid-state ion selective electrode based on a single-walled carbon nanohorn electrode. The solid-state ion selective electrode comprises an electrode substrate and an ion selective polymer membrane coating the electrode substrate surface; the electrode substrate is an electrode doped with a single-walled carbon nanohorn or an electrode modified by the single-walled carbon nanohorn membrane on the surface. Compared with an ion selective electrode containing inner filling liquid, the solid-state ion selective electrode has high sensitivity and selectivity, and can develop in microelectrode direction.

Description

technical field [0001] The invention relates to the technical field of electrochemical sensors, in particular to a solid ion selective electrode based on a single-walled carbon nanohorn electrode and a preparation method thereof. Background technique [0002] Ion-selective electrode is a kind of electrochemical sensor that uses membrane potential to measure the activity or concentration of ions in solution. The ionic activity is directly related to the membrane potential. As an analytical test tool that can quickly, accurately, conveniently and selectively determine the content of certain ions in complex samples, ion-selective electrodes have been widely used in environmental monitoring, biomedical testing, chemical production, geological testing and other fields. The traditional ion selective electrode consists of a sensitive membrane, an inner liquid and a conductive element. However, due to the existence of filling liquid, this kind of sensor cannot be miniaturized. ...

Claims

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Application Information

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IPC IPC(8): G01N27/333
CPCB82Y15/00B82Y30/00G01N27/308G01N27/333G01N27/3335
Inventor 平建峰姜成美姚瑶
Owner ZHEJIANG UNIV
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