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Preparation method and application of a four-electrode system hydrogen peroxide electrochemical sensor

A hydrogen peroxide, electrochemical technology, applied in scientific instruments, instruments, material analysis through electromagnetic means, etc., can solve the problems of restricting wide application and affecting the convenience of operation, and achieve high selectivity detection and convenient operation , Improve the effect of detection sensitivity and detection limit

Active Publication Date: 2018-06-01
鲁焱工程技术咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, since the electrochemiluminescence sensor requires external light signal capture devices such as photodiodes, and the photoelectrochemical sensor requires an external light source to excite the photosensitive material, this affects the convenience of the operation of the two to a certain extent and limits them. Wider application in actual production and life

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  • Preparation method and application of a four-electrode system hydrogen peroxide electrochemical sensor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 A four-electrode system hydrogen peroxide electrochemical sensor, the specific preparation steps are:

[0039] (1) Preparation of ECL working electrode W1:

[0040] 1) Use ITO conductive glass as the working electrode, and drop-coat NH on the surface of the electrode 4 NiPO 4 Solution, covering an area of ​​1 cm × 1 cm, dry at room temperature;

[0041] 2) Apply the working electrode obtained in 1) to the NH 4 NiPO 4 Surface drop coating of Au@Ag 2 S NRs, covering an area of ​​1 cm × 1 cm, dried at room temperature;

[0042] 3) Immerse the working electrode obtained in 2) into the electrolyte, and the immersion area is NH 4 NiPO 4 and Au@Ag 2 The area covered by S NRs was electrochemically deposited on the working electrode using a three-electrode system. After deposition, the working electrode was taken out, washed with ultrapure water, and dried at 4 °C in the dark to prepare the electrochemiluminescent working electrode W1;

[0043] The NH 4 NiPO ...

Embodiment 2

[0061] Example 2 A four-electrode system hydrogen peroxide electrochemical sensor, the specific preparation steps are:

[0062] (1) Preparation of ECL working electrode W1:

[0063] The preparation steps are the same as the preparation steps of W1 in Example 1, the difference is: the ammonium salt addition is 0.3 g in the preparation step of the nickel ammonium phosphate micro-nano material, the phosphate addition is 0.20 g, and the nickel dichloride addition is 0.20 g, the stirring temperature and time were 38 ℃ and 12 h, respectively; the length of gold nanorods was 30 nm; the concentration of luminol in the electrolyte was 5 mmol / L, and the concentration of sulfuric acid was 0.5 mol / L; cyclic voltammetry When performing electrochemical deposition, cycle 25 times.

[0064] (2) Preparation of photoelectrochemical working electrode W2:

[0065] 1) Use ITO conductive glass as the working electrode, drop-coat 10 µL TiO on the surface of the electrode 2 NSs, dry at room tempe...

Embodiment 3

[0071] Example 3 A four-electrode system hydrogen peroxide electrochemical sensor, the specific preparation steps are:

[0072] (1) Preparation of electrochemiluminescent working electrode W1:

[0073] The preparation steps are the same as the preparation steps of W1 in Example 1, the difference is: the ammonium salt addition is 0.4 g in the preparation step of the nickel ammonium phosphate micro-nano material, the phosphate addition is 0.25 g, and the nickel dichloride addition is 0.25 g, the stirring temperature and time were 45 ℃ and 14 h, respectively; the length of gold nanorods was 40 nm; the concentration of luminol in the electrolyte was 10 mmol / L, and the concentration of sulfuric acid was 1.0 mol / L; cyclic voltammetry When performing electrochemical deposition, cycle 30 times.

[0074] (2) Preparation of photoelectrochemical working electrode W2:

[0075] 1) Using ITO conductive glass as the working electrode, drop-coat 12 µL TiO on the surface of the electrode 2 ...

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Abstract

The invention discloses a preparation method of a four-electrode system dual-function hydrogen peroxide sensor based on functional nanomaterials. The prepared sensor is simple to operate, convenient to carry, fast to detect, and low in cost, and can be used in daily production, life and other fields. Rapid, sensitive detection of hydrogen peroxide.

Description

technical field [0001] The invention relates to a preparation method of a sensor for detecting hydrogen peroxide, and the sensor integrates dual functions of electrochemiluminescence and photoelectrochemistry. It belongs to the field of new nano functional materials and electrochemical biosensing analysis technology. Background technique [0002] Hydrogen peroxide is an oxidizing agent, which can be decomposed into water and oxygen under normal circumstances, but it is relatively slow. When a catalyst (or biological enzyme) is added, the reaction speed is accelerated, so that the amount of hydrogen peroxide or the catalyst (or The amount of biological enzymes), and hydrogen peroxide often exists in the form of reaction intermediates in organisms. Therefore, hydrogen peroxide plays an important role in the fields of medical diagnosis, clinical treatment, environmental testing and food production. Research The development of hydrogen peroxide detection method also has very im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/327
CPCG01N27/3271
Inventor 张勇李燕王荣雨任祥杜斌
Owner 鲁焱工程技术咨询有限公司
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