Preparation method and applications of bifunctional enzyme-free hydrogen peroxide photoelectric chemical sensor

A non-enzymatic hydrogen peroxide, photoelectrochemical technology, applied in the direction of chemical reaction of materials for analysis, material electrochemical variables, scientific instruments, etc. Easy to operate, highly selective detection, the effect of improving detection sensitivity and detection limit

Inactive Publication Date: 2016-08-03
UNIV OF JINAN
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  • 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 applications of bifunctional enzyme-free hydrogen peroxide photoelectric chemical sensor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 is a dual-functional enzyme-free hydrogen peroxide photoelectrochemical sensor, the specific preparation steps are:

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

[0036] 1) Using ITO conductive glass as the working electrode, drop-coat AuNRs on the surface of the electrode, covering an area of ​​1cm×1cm, and dry it at room temperature;

[0037] 2) Immerse the working electrode obtained in 1) into the electrolyte, and the immersion area is the area covered by AuNRs, and use the three-electrode system to perform electrochemical deposition on the working electrode. After deposition, take out the working electrode and clean it with ultrapure water at 4 °C. Drying in the dark to prepare the electrochemiluminescent working electrode W1;

[0038] The AuNRs is an aqueous solution of gold nanorods, and the gold nanorods are rod-shaped gold nanoparticles with a length of 20nm;

[0039] Described electrolytic solution is the sulfuric acid solution containin...

Embodiment 2

[0053] Embodiment 2 is a dual-functional enzyme-free hydrogen peroxide photoelectrochemical sensor, the specific preparation steps are:

[0054] (1) Preparation of ECL 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 30nm, the concentration of luminol in the electrolyte is 5mmol / L, the concentration of sulfuric acid is 0.5mol / L, and the cyclic voltammetry is carried out During electrochemical deposition, cycle 25 times.

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

[0057] 1) Using ITO conductive glass as the working electrode, drop-coat 10 μL rGO / TiO on the surface of the electrode 2 , 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) The surface of the working electrode obtained in 2) was drip-coated with 10 μ...

Embodiment 3

[0063] Embodiment 3 A dual-functional enzyme-free hydrogen peroxide photoelectrochemical sensor, the specific preparation steps are:

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

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

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

[0067] 1) Using ITO conductive glass as the working electrode, drop-coat 12 μL rGO / TiO on the surface of the electrode 2 , 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) The surface of the working electrode obtained in 2) was dri...

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Abstract

The invention discloses a preparation method of a bifunctional enzyme-free hydrogen peroxide sensor, which is constructed on the basis of a functional nano material. The prepared sensor has the advantages of simple operation, portability, rapidness for detection, and low cost, and can be used to rapidly and sensitively detect hydrogen peroxide in daily life and production.

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 Applications(China)
IPC IPC(8): G01N21/76G01N27/30
CPCG01N21/76G01N27/305
Inventor 张勇范大伟王雪萍李燕魏琴
Owner UNIV OF JINAN
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