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Preparation method and application of electroactive ionic liquid-based mesoporous silicon modified electrode

A technology of ionic liquid and modified electrode, which is applied in the field of electrochemical enzyme-free sensor preparation, can solve the problem of unclear chemical reaction mechanism between ferricyanide ion and hydrogen peroxide, etc., achieve simple and effective modification of electrode, and realize the effect of catalytic reduction

Inactive Publication Date: 2015-05-27
SHENYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no researchers have used ionic liquid-based mesoporous silicon to immobilize ferricyanide ions to prepare electroactive modified electrodes for electrochemical catalysis of hydrogen peroxide. The chemical reaction mechanism is unclear and has a certain relationship

Method used

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  • Preparation method and application of electroactive ionic liquid-based mesoporous silicon modified electrode
  • Preparation method and application of electroactive ionic liquid-based mesoporous silicon modified electrode
  • Preparation method and application of electroactive ionic liquid-based mesoporous silicon modified electrode

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Embodiment 1

[0029] A method for preparing an electroactive ionic liquid-based mesoporous silicon modified electrode, the specific implementation steps are as follows:

[0030] a. Prepare 1.5 mg / mL ionic liquid modified mesoporous silicon solid particle (MCF-IL) dispersion and 2% polyvinyl alcohol solution by mass fraction;

[0031] b. Take the ionic liquid modified mesoporous silicon solid particle dispersion prepared in step a and mix it with the above polyvinyl alcohol solution. After mixing, the concentration of the mesoporous silicon solid particle dispersion is 1.5mg / mL, and the polyvinyl alcohol solution The mass fraction is 0.5‰, and the mixed solution is evenly mixed by vortex to make a drop coating solution;

[0032] c. Dispensing electrode: Vortex the dispensing solution prepared in step b, take 5 μL of the dispensing solution on the glassy carbon electrode, and dry overnight;

[0033] d.MCF-IL-Fe(CN) 6 3- / Preparation of PVA modified electrode

[0034] Put the glassy carbo...

Embodiment 2

[0040] A method for preparing an electroactive ionic liquid-based mesoporous silicon modified electrode, the specific implementation steps are as follows:

[0041] a. Prepare 2.0 mg / mL ionic liquid modified mesoporous silicon solid particle (MCF-IL) dispersion and 3.0% polyvinyl alcohol solution by mass fraction;

[0042] b. Take the ionic liquid modified mesoporous silicon solid particle dispersion prepared in step a and mix it with the above polyvinyl alcohol solution. After mixing, the concentration of the mesoporous silicon solid particle dispersion is 1.9mg / mL, and the polyvinyl alcohol solution The mass fraction is 1‰, and the mixed solution is evenly mixed by vortex to make a drop coating solution;

[0043] c. Dispensing electrode: Vortex the dispensing solution prepared in step b, take 8 μL of the dispensing solution on the glassy carbon electrode, and dry overnight;

[0044] d.MCF-IL-Fe(CN) 6 3- / Preparation of PVA modified electrode

[0045] Put the glassy carbo...

Embodiment 3

[0049] A method for preparing an electroactive ionic liquid-based mesoporous silicon modified electrode, the specific implementation steps are as follows:

[0050] a. Prepare 1.5 mg / mL ionic liquid modified mesoporous silicon solid particle (MCF-IL) dispersion and 2% polyvinyl alcohol solution by mass fraction;

[0051] b. Take the ionic liquid modified mesoporous silicon solid particle dispersion prepared in step a and mix it with the above polyvinyl alcohol solution. After mixing, the concentration of the mesoporous silicon solid particle dispersion is 0.95mg / mL, and the polyvinyl alcohol solution The mass fraction is 0.5‰, and the mixed solution is evenly mixed by vortex to make a drop coating solution;

[0052] c. Dispensing electrode: Vortex the dispensing solution prepared in step b, take 5 μL of the dispensing solution on the glassy carbon electrode, and dry overnight;

[0053] d.MCF-IL-Fe(CN) 6 3- / Preparation of PVA modified electrode

[0054] Put the glassy carb...

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Abstract

The invention discloses a preparation method and application of an electroactive ionic liquid-based mesoporous silicon modified electrode. Aiming at the problems such as research lack of electrochemical catalysis of hydrogen peroxide when a conventional electroactive modified electrode is prepared by using ionic liquid-based mesoporous silicon immobilized ferricyanide ions and the like, the invention provides the preparation method and the application of the electroactive ionic liquid-based mesoporous silicon modified electrode. The method comprises the following steps: by taking ionic liquid modified mesoporous silicon as a carrier, preparing the electroactive chemically modified electrode by virtue of the immobilized ferricyanide ions; and moreover, the catalytic performance of the concentration of hydrogen peroxide is tested by adopting a cyclic voltammetry and a chronoamperometry. The preparation method disclosed by the invention is simple and effective, carbon powder and other components are not doped, the catalytic reduction of the hydrogen peroxide is effectively realized, and a model is provided for researching a reaction mechanism between the ferricyanide ions and the hydrogen peroxide at the later stage.

Description

technical field [0001] The present invention relates to a preparation method and application of an electroactive ionic liquid-based mesoporous silicon modified electrode, in particular to a preparation method of a chemically modified electrode using organically modified mesoporous silicon as a substrate to immobilize electroactive small molecules The invention and application belong to the field of preparation of electrochemical enzyme-free sensors. Background technique [0002] Constructing stable, efficient and sensitive electrochemical sensors is a hot topic in the field of electroanalytical chemistry. [0003] Hydrogen peroxide is an important by-product of a series of enzymatic reactions in various human metabolisms. It can not only accelerate the aging of the human body, but also has an inseparable relationship with Alzheimer's disease and Parkinson's disease. By detecting the concentration of hydrogen peroxide, various functions of the human body can be monitored an...

Claims

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Application Information

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IPC IPC(8): G01N27/30
Inventor 张玲张谦范运矫淞霖林海波段纪东张洪波
Owner SHENYANG NORMAL UNIV
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