Preparation method of modified glassy carbon electrode as hydrogen peroxide sensor and application thereof

A glassy carbon electrode and hydrogen peroxide technology, applied in the field of electrochemical analysis and detection, can solve the problems of long response time, cumbersome detection, poor stability, etc., and achieve the effects of high current response, simple preparation method, and good stability

Inactive Publication Date: 2017-07-25
SHANGHAI UNIV
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Problems solved by technology

At present, methods for detecting hydrogen peroxide content include titration, spectroscopy, fluorescence, chemiluminescence, etc., but their disadvantages are long response time, complicated detection, low sensitivity, and poor stability. It is relatively simple, fast, high repeatability and reliable results

Method used

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  • Preparation method of modified glassy carbon electrode as hydrogen peroxide sensor and application thereof
  • Preparation method of modified glassy carbon electrode as hydrogen peroxide sensor and application thereof

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Experimental program
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Embodiment 1

[0018] The preparation process and steps in this embodiment are as follows:

[0019] (1). Pretreatment of the glassy carbon electrode: First, use 1.0 μm, 0.3 μm and 0.05 μm alumina (Al 2 O 3 ) The powder is polished on the chamois leather, and then ultrasonically cleaned with double distilled water, absolute ethanol and double distilled water for 3 to 5 minutes to obtain a clean glassy carbon electrode for use;

[0020] (2). Preparation of glassy carbon electrode modifier: Weigh 1 mg of carbon nanofibers loaded with silver nanoparticles, add 2 mL of 50% nitroazodimethyl formamide aqueous solution to it, and then ultrasonically disperse for 0.5~ 1 h, get the glassy carbon electrode modifier with a mass concentration of 0.5 mg / mL;

[0021] (3). Preparation of modified glassy carbon electrode: Take 8 μL of the above-mentioned modifier and drop it on the cleaned surface of the above-mentioned glassy carbon electrode, dry it under an infrared lamp, and form a uniform silver nanoparticle / c...

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Abstract

The invention discloses a preparation method and application of a modified glassy carbon electrode as a hydrogen peroxide sensor. The steps of the method are as follows: first, the glassy carbon electrode is ultrasonically cleaned with double distilled water, absolute ethanol and double distilled water in sequence, Obtain a clean glassy carbon electrode; then, ultrasonically disperse 1mg of carbon nanofibers loaded with silver nanoparticles and 2mL of 50% nitrogen-nitrogen dimethylformamide aqueous solution into a uniform glassy carbon electrode modifier; take 8 μL of the above A modifier is added dropwise on the surface of the cleaned glassy carbon electrode, and dried under an infrared lamp to obtain a modified glassy carbon electrode. The preparation method of the modified glassy carbon electrode is simple and easy to operate, and can be directly used for rapid electrochemical determination of hydrogen peroxide, has high current response and good stability, and can improve the detection efficiency and accuracy of hydrogen peroxide.

Description

Technical field [0001] The invention relates to a preparation method and application of a modified glassy carbon electrode as a hydrogen peroxide sensor, and belongs to the technical field of electrochemical analysis and detection. Background technique [0002] Carbon nanofiber is a kind of carbon material between carbon fiber and carbon nanotube. It has the advantages of low density, high specific strength, large aspect ratio, large specific surface area, and good electrical conductivity. Currently, most of the materials used for electrospinning carbon nanofibers are polyacrylonitrile. Polyacrylonitrile is prepared into nanofiber felt by electrostatic spinning technology, and carbon nanofiber can be obtained by carbonization. [0003] The surface of silver nanoparticles is easy to adsorb reactants, and the strength is moderate, so it is easy to form intermediate "active compounds", and has been widely used in the field of sensors. For silver nanoparticles to be used well, they n...

Claims

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Application Information

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IPC IPC(8): G01N27/30
CPCG01N27/30
Inventor 王琦罗立强祝妍韩龙邓冬梅李媛媛
Owner SHANGHAI UNIV
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