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Preparation method of graphite olefince modified electrochemical sensor electrode

A sensor electrode and graphene technology, which is applied in the field of preparation of graphene-modified electrochemical sensor electrodes, can solve the problems of not preparing electrochemical sensors and achieve high sensitivity and good stability

Inactive Publication Date: 2012-08-22
WUXI BAILING SENSING TECH
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  • Description
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  • Application Information

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Problems solved by technology

At present, no electrochemical sensor for NO detection has been prepared by taking advantage of the excellent electrical conductivity of graphite.

Method used

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  • Preparation method of graphite olefince modified electrochemical sensor electrode
  • Preparation method of graphite olefince modified electrochemical sensor electrode

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Embodiment Construction

[0012] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with implementation.

[0013] A kind of preparation method of graphene modified electrochemical sensor electrode, its steps are as follows:

[0014] (1) The synthesized graphene oxide (GO) is dispersed in water to form an aqueous solution with a concentration of 0.125 mg / mL;

[0015] (2) The pure glassy carbon (GC) electrode was first polished with 0.3 μm aluminum powder, then washed with deionized water twice, and then ultrasonicated in ethanol, acetone and water for 5 minutes;

[0016] (3) 10 μL GO solution was dropped on the surface of the GC electrode, and then the electrode was dried at room temperature to obtain a graphene oxide-modified glassy carbon electrode, which was labeled as GO / GC electrode;

[0017] (4) Immerse the GO / GC electrode in 10mmol / L phosphate buffer solution with a pH value of 5, and then perform 5 cyclic potential...

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Abstract

The invention relates to a preparation method of a graphite olefince modified electrochemical sensor electrode. The preparation method comprises the following steps of: preparing water solution of graphite olefince (GO); preparing pure glass carbon (GC) electrode; dropping the solution of the graphite olefince (GO) onto the surface of the glass carbon (GC) electrode, and drying the electrode at room temperature to obtain graphite olefince oxide modified glass carbon electrode which is marked as GO / GC electrode; and immersing the GO / GC electrode into 10mmol / L phosphate buffer with the pH value of 5 for potential scanning to prepare the graphite olefince modified electrode. As the graphite olefince electrode has high activity to the NO electrochemical reduction, the interference effect of nitrite ion (NO2-) and other biological substances can be neglected substantially in the presence of Nafion membrane. Therefore, the prepared electrode has rapid response to NO, has high sensitivity and good stability and can be applied to detecting the oxide of sweat nitrogen.

Description

Technical field: [0001] The invention relates to a preparation method of an electrochemical sensor electrode, in particular to a preparation method of a graphene-modified electrochemical sensor electrode for nitric oxide detection by electrochemically reducing graphene oxide on a glassy carbon electrode. Background technique: [0002] Graphene, as an emerging carbon material, has aroused great theoretical and experimental interest since its discovery and successful isolation from graphite bulk. Graphene is a layer of sp 2 Single-atom-thick planar sheets of hybridized carbon atoms. Graphene can be wrapped into zero-dimensional fullerenes, rolled into one-dimensional nanotubes, or stacked into three-dimensional graphite. Therefore, two-dimensional graphene is considered to be the building block of all other dimensional carbon materials. In addition, based on its ultra-fast electron transport properties, high surface area, special graphene-based flake structure and low proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
Inventor 孙京华王锦潘正海
Owner WUXI BAILING SENSING TECH
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