Preparation and application of nano-cuprous oxide based enzyme-free hydrogen peroxide sensor electrode

An enzyme-free hydrogen peroxide and nano-cuprous oxide technology, applied in the field of electrochemical analysis and detection, can solve the problems of application limitations, poor stability and regeneration, enzyme inactivation, etc., and achieve short response time, low detection limit, The effect of high sensitivity

Inactive Publication Date: 2012-10-17
SOUTHWEST UNIV
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  • Abstract
  • Description
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Problems solved by technology

However, in the development of enzyme electrochemical sensors, because enzymes are easily inactivated by various external factors, resulting in poor stability and reproducibility, their applications are greatly limited.

Method used

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  • Preparation and application of nano-cuprous oxide based enzyme-free hydrogen peroxide sensor electrode
  • Preparation and application of nano-cuprous oxide based enzyme-free hydrogen peroxide sensor electrode
  • Preparation and application of nano-cuprous oxide based enzyme-free hydrogen peroxide sensor electrode

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Embodiment 1

[0020] The preparation process and steps of the cuprous oxide enzyme-free hydrogen peroxide sensor electrode in this embodiment are as follows:

[0021] (1) Preparation of nano cuprous oxide

[0022] Using the porous aluminum oxide film produced by the double anodic oxidation method as a template, a layer of gold film was evaporated on the back as the working electrode, and then the DC electrochemical deposition method was used, with the carbon sheet electrode as the auxiliary electrode, and the electrolyte was 150g / The copper sulfate pentahydrate of L, the lactic acid of 234g / L, adjust the electrolyte pH value to be 11 with the NaOH aqueous solution of 5M. The electrodeposition was carried out in a water bath at 60°C, the deposition voltage was -0.65V, and the deposition time was 40 minutes. After the deposition is completed, the aluminum oxide template is removed in 1M NaOH aqueous solution to obtain cuprous oxide nanowires.

[0023] (2) Preparation of enzyme-free hydroge...

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Abstract

The invention relates to a preparation method and application of a nano-cuprous oxide based enzyme-free hydrogen peroxide sensor electrode, belonging to the technical field of electrochemical analysis and detection. The preparation method is mainly characterized by utilizing cuprous oxide nanowires and Nafion to modify a gold electrode and utilizing the catalysis characteristic of cuprous oxide to detect the content of hydrogen peroxide in a solution. The preparation method comprises the following steps: firstly weighing a certain amount of cuprous oxide nanowires synthesized in advance, and preparing a dispersion solution from ultrapure water; after uniform ultrasonic dispersion, dropwisely adding part of the solution to the polished gold electrode; then dropwisely adding a certain amount of the Nafion solution after drying in the air; and drying the gold electrode in the air at room temperature, thus obtaining the nano-cuprous oxide based enzyme-free hydrogen peroxide sensor electrode. The sensor electrode can be directly used for quick electrochemical determination of hydrogen peroxide. The invention has the advantages of simple preparation method, low detection limit, high sensitivity and good stability.

Description

technical field [0001] The invention relates to the technical field of electrochemical analysis and detection. Background technique [0002] Hydrogen peroxide H 2 o 2 It has multiple functions and wide uses such as oxidation, bleaching, disinfection and sterilization. to H 2 o 2 Rapid and accurate detection of content is of great significance in food, pharmaceutical, biological and environmental analysis. Currently, there are many methods for detecting hydrogen peroxide, such as titration, spectrophotometry, and electrochemical methods. Among them, electrochemical methods, especially enzyme electrochemical biosensors, are widely used in the determination of hydrogen peroxide due to their simple method and high sensitivity. However, in the development of enzyme electrochemical sensors, because the enzyme is easily inactivated by various external factors, resulting in poor stability and reproducibility, its application is greatly limited. In order to reduce or eliminate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
Inventor 赵建伟秦丽溶闫种可木繁
Owner SOUTHWEST UNIV
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