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Preparation method and application of hydrogen peroxide photoelectrochemical sensor without external light source

A peripheralless light source, photoelectrochemical technology, applied in electrochemical variables of materials, scientific instruments, material analysis by electromagnetic means, etc. Intensity, high selectivity detection, easy operation effect

Inactive Publication Date: 2018-07-31
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, because electrochemiluminescence sensors require external light signal capture devices such as photodiodes, while photoelectrochemical sensors require external light sources to excite photosensitive materials, this affects the convenience of both operations to a certain extent and limits They are more widely used in actual production and life

Method used

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  • Preparation method and application of hydrogen peroxide photoelectrochemical sensor without external light source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 A hydrogen peroxide photoelectrochemical sensor without an external light source, the specific preparation steps are:

[0035] (1) Preparation of electrochemiluminescent working electrode W1:

[0036] 1) Use ITO conductive glass as the working electrode, and drop-coat Au@Ag on the surface of the electrode 2 S NRs, covering an area of ​​1 cm × 1 cm, dried at room temperature;

[0037] 2) Immerse the working electrode obtained in 1) into the electrolyte, and the immersion area is 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;

[0038] The Au@Ag 2 S NRs is an aqueous solution of rod-shaped nanomaterials with a core-shell structure. The rod-shaped nanomaterials with a core-shell structure are rod-shaped nanomaterials ...

Embodiment 2

[0053] Embodiment 2 A hydrogen peroxide photoelectrochemical sensor without an external light source, the specific preparation steps are:

[0054] (1) Preparation of electrochemiluminescence working electrode W1:

[0055] The preparation steps are the same as those of W1 in Example 1, except that the length of the gold nanorods is 30 nm, the concentration of luminol in the electrolyte is 5 mmol / L, the concentration of sulfuric acid is 0.5 mol / L, and the cyclic voltammetry When the electrochemical deposition method is used, the cycle is 25 times.

[0056] (2) Preparation of photoelectrochemical working electrode W2:

[0057] 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 temperature;

[0058] 2) Put the working electrode obtained in 1) into a muffle furnace, perform annealing treatment at 450 °C, and cool to room temperature after treatment;

[0059] 3) Drop-coat 10 µL of HRP on the surface of th...

Embodiment 3

[0063] Embodiment 3 A hydrogen peroxide photoelectrochemical sensor without an external light source, the specific preparation steps are:

[0064] (1) Preparation of electrochemiluminescent working electrode W1:

[0065] The preparation steps are the same as those of W1 in Example 1, except that the length of the gold nanorods is 40 nm, the concentration of luminol in the electrolyte is 10 mmol / L, the concentration of sulfuric acid is 1.0 mol / L, and the cyclic voltammetry When the electrochemical deposition method is used, the cycle is 30 laps.

[0066] (2) Preparation of photoelectrochemical working electrode W2:

[0067] 1) Using ITO conductive glass as the working electrode, drop-coat 12 µL TiO on the surface of the electrode 2 NSs, dry at room temperature;

[0068] 2) Put the working electrode obtained in 1) into a muffle furnace, perform annealing treatment at 450 °C, and cool to room temperature after treatment;

[0069] 3) Drop-coat 12 µL of HRP on the surface of t...

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Abstract

The invention discloses a preparation method of a dual-function hydrogen peroxide sensor without peripheral light source constructed on the basis of 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, etc. Rapid and sensitive detection of hydrogen peroxide in the field.

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): G01N27/416G01N27/30
CPCG01N27/30G01N27/416
Inventor 张勇吴丹魏贻成李小建杜斌
Owner UNIV OF JINAN
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