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Perfluorinated sulfonic acid resin modified SnO2-coated ZnO nanotube array electrode used for detecting dopamine and application of nanotube array electrode

A technology of perfluorosulfonic acid resin and nanotube array, which is applied in the direction of material electrochemical variables, etc., can solve the problems of disordered distribution of carbon nanotubes and failure to fully exert their functions, and achieve the effect of improving performance

Active Publication Date: 2014-09-10
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in these electrodes, carbon nanotubes are usually distributed on the electrode surface in a disorderly manner, and their role as a "fast channel" for charge transport has not been fully utilized.

Method used

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  • Perfluorinated sulfonic acid resin modified SnO2-coated ZnO nanotube array electrode used for detecting dopamine and application of nanotube array electrode
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  • Perfluorinated sulfonic acid resin modified SnO2-coated ZnO nanotube array electrode used for detecting dopamine and application of nanotube array electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0024] In the three-electrode system, a platinum plate and a saturated calomel electrode were used as the counter electrode and a reference electrode, respectively, and ITO glass or FTO glass was used as the working electrode. The electrolyte solution is an aqueous solution containing 5mM zinc nitrate and 5mM ammonium acetate. The electrolyte temperature was raised to and maintained at 85°C by means of a water bath. Using an electrochemical workstation (CHI660C, Shanghai Chenhua Instrument Co., Ltd.) to apply a potential of -1V to the working electrode for 3 hours, the ZnO nanorod array grown on ITO glass or FTO glass was obtained; this ZnO nanorod array was placed on The single crystal ZnO nanotube array is obtained by immersing for 1.5 hours in an aqueous solution of sodium hydroxide with a concentration of 0.2M and a temperature of 85°C. Place the ITO glass or FTO glass with the single crystal ZnO nanotube array in the porcelain boat, put it in the low-temperature central ...

Embodiment 2

[0026] The Nafion modified polycrystalline SnO grown vertically on the ITO glass substrate obtained in Example 1 2 The nanoparticle film-coated single crystal ZnO nanotube array is used as the working electrode, the platinum plate electrode is used as the counter electrode, and the saturated calomel electrode is used as the reference electrode to form a three-electrode electrochemical system. The detection object is a PBS solution (pH=7.4) containing 0.1 μM dopamine. By electrochemical workstation, utilize cyclic voltammetry (CV) and differential pulse voltmetry (DPV) to test the electrochemical response of detection object, the result is as follows image 3 shown.

Embodiment 3

[0028] The Nafion modified polycrystalline SnO grown vertically on the ITO glass substrate obtained in Example 1 2 The nanoparticle film-coated single crystal ZnO nanotube array is used as the working electrode, the platinum plate electrode is used as the counter electrode, and the saturated calomel electrode is used as the reference electrode to form a three-electrode electrochemical system. The detection object is a PBS solution (pH=7.4) containing 2 μM dopamine. By electrochemical workstation, utilize cyclic voltammetry (CV) and differential pulse voltmetry (DPV) to test the electrochemical response of detection object, the result is as follows Figure 4 shown.

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Abstract

The invention belongs to the technical field of nano material application, and particularly relates to a perfluorinated sulfonic acid resin (Nafion) modified SnO2-coated ZnO nanotube array electrode used for detecting dopamine and the application of the nanotube array electrode. The nanotube array electrode comprises a conductive substrate and a Nafion modified polycrystal SiO2 nano-particle film-coated single-crystal ZnO nanotube array which vertically grows on the conductive substrate. The Nafion modified SnO2-coated ZnO nanotube array electrode used for detecting the dopamine can be used for detecting the dopamine in water solution; when the nanotube array electrode is taken as a working electrode, a platinum gauze electrode is used as a counter electrode, a saturated calomel electrode is used as a reference electrode, and a cyclic voltammetry (CV) or differential pulse voltammetry (DPV) is used for detecting the dopamine in water solution, the nanotube array electrode is capable of generating very strong electrochemical signals.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial application, in particular to a perfluorosulfonic acid resin (Nafion) modified SnO for detecting dopamine 2 Nanotube array electrode coated with ZnO and its application. Background technique [0002] Dopamine (DA) is an important neurotransmitter that plays an important role in the central nervous system, hormone system, cardiovascular system and kidney function. The concentration of DA in the human body will change with some major diseases, such as schizophrenia, Parkinson's disease, Alzheimer's disease, AIDS infection and so on. Therefore, the detection of DA concentration in the human body is of great significance for neurophysiological research, disease diagnosis and control of related drugs. [0003] Electrochemical sensors are an important means of dopamine detection. In electrochemical sensors, the most important building blocks are electrodes that respond to dopamine. Due to the e...

Claims

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Application Information

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IPC IPC(8): G01N27/48G01N27/30
Inventor 佘广为师文生
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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