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Preparation method of copper nanowire graphene composite-modified electrode, as well as applications thereof

A technology of copper nanowires and modified electrodes, which is applied in the field of electrochemical analysis and detection, and achieves the effects of simple and easy preparation, high repeatability, and improved sensitivity.

Active Publication Date: 2015-04-29
上海睿骋实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There have been many reports on zero-dimensional nanomaterials and two-dimensional graphene composites as glucose electrocatalysts, but so far there has been no report on the use of one-dimensional copper nanowires and two-dimensional graphene composites for glucose electrocatalysis.

Method used

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  • Preparation method of copper nanowire graphene composite-modified electrode, as well as applications thereof
  • Preparation method of copper nanowire graphene composite-modified electrode, as well as applications thereof
  • Preparation method of copper nanowire graphene composite-modified electrode, as well as applications thereof

Examples

Experimental program
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Embodiment 1

[0018] Embodiment 1: the preparation method of copper nanowire-graphene composite modified electrode, comprises the following steps:

[0019] (1) Cleaning of ITO glass: put a 1cm×1.5cm ITO glass in a beaker, use acetone, absolute ethanol, and deionized water to sonicate for 10 minutes, and then dry it naturally for use.

[0020] (2) Take 0.153ml of 4mg / ml graphene oxide aqueous solution, add 1ml of 0.1M Cu(NO 3 ) 2 Sonicate the solution for 15 minutes, then add 0.16 ml of anhydrous ethylenediamine to the above mixed solution, and sonicate for 10 minutes to obtain a dark purple solution.

[0021] (3) Configure 15M NaOH solution, take 20ml and add it to a single-necked flask and heat it to 60°C in a water bath, then slowly add the dark purple solution obtained in (2) into the NaOH solution and stir vigorously, and then stir after the addition is complete For a period of time, finally add 45ul mass fraction of 35% N 2 h 4 Aqueous solution, after stirring for 30s, let stand to...

Embodiment 2

[0023] Example 2: The copper nanowire-graphene composite modified electrode prepared in Example 1 was used for the determination of glucose concentration.

[0024] The copper nanowire-graphene composite modified ITO glass electrode is used as the working electrode, the silver / silver chloride electrode is used as the reference electrode, and the platinum sheet electrode is used as the counter electrode to form a three-electrode system; when measuring the glucose concentration, the three-electrode system Place it in a beaker containing 40ml of NaOH solution with a concentration of 0.1M, then apply a constant voltage of 0.58V on the working electrode, record the current-time curve, and when the background current reaches a stable level, add NaOH of known concentration to the solution under stirring Glucose solution; in the range of 300nM-2mM glucose concentration, the current-glucose concentration linear relationship curve is obtained. Concentration value in mM.

[0025] Accordi...

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Abstract

The invention discloses a preparation method of a copper nanowire graphene composite-modified electrode, as well as applications thereof serving as a glucose electrochemical sensor. The preparation method mainly comprises the following steps: modifying ITO glass as an electrode by utilizing a copper nanowire graphene composite, preparing the copper nanowire graphene composite by adopting liquid phase reduction, evenly mixing with a Nafion solution, dropwise adding to the ITO glass, to obtain the copper nanowire graphene composite. The sensitive quantitative analysis determination can be performed to glucose by adopting a current-time curve through the electrochemical catalysis oxidization action of the modified electrode to the glucose. The preparation method is simple and easy, low in detection limit, and high in sensitivity, and the concentration of glucose can be fast detected.

Description

technical field [0001] The invention belongs to the technical field of electrochemical analysis and detection, and relates to the preparation of a copper nanowire-graphene composite modified electrode and its application as a glucose electrochemical sensor. Background technique [0002] Diabetes is a metabolic disorder syndrome that belongs to the world public health problem. Once diabetes is not well controlled, it can cause many complications. These complications can be greatly reduced or even eliminated by strictly controlling the blood sugar concentration level of the human body. Glucose electrochemical sensors can be divided into enzyme and non-enzyme according to the use of enzyme. Compared with enzyme-based glucose sensors, non-enzymatic glucose sensors have the advantages of not being limited by oxygen concentration, better stability, and low cost, so they have received great attention. [0003] Since the discovery of graphene by British scientists in 2004, graphe...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/416
Inventor 刘爱萍陆标吴国松张华帆
Owner 上海睿骋实业有限公司
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