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Preparation method for hydrogen peroxide non-enzymatic sensor established based on molybdenum sulfide composite and application

A composite material, hydrogen peroxide technology, applied in the direction of material electrochemical variables, etc., can solve the problems that affect the convenience of operation and limit the wide application, and achieve the effect of convenient operation, high selectivity detection and simple preparation

Inactive Publication Date: 2016-06-15
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Preparation method for hydrogen peroxide non-enzymatic sensor established based on molybdenum sulfide composite and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 A hydrogen peroxide enzyme-free sensor based on a molybdenum sulfide composite material, the specific preparation steps are:

[0035] (1) Zn-MoS 2 Preparation of:

[0036] 0.005g zinc chloride ZnCl 2 , 2mL of 0.1mol / L ascorbic acid solution, 0.5mL of sodium molybdate Na 2 MoO 4 solution and 0.01 g sodium sulfide Na 2 S, after mixing and stirring for 15 minutes, put it into the reaction kettle, and react for 16 hours at 150°C; after cooling to room temperature, use deionized water to wash centrifugally, and vacuum dry at 40°C to obtain Zn-MoS 2 , which was dissolved in deionized water to obtain Zn-MoS 2 solution.

[0037] (2) Preparation of ECL working electrode W1:

[0038] 1) Using ITO conductive glass as the working electrode, drop-coat the Zn-MoS prepared in (1) on the surface of the electrode 2 Solution, covering an area of ​​1cm × 1cm, dry at room temperature;

[0039] 2) Immerse the working electrode obtained in 1) into the electrolyte, and the im...

Embodiment 2

[0054] Example 2 A hydrogen peroxide enzyme-free sensor based on a molybdenum sulfide composite material, the specific preparation steps are:

[0055] (1) Zn-MoS 2 Preparation of:

[0056] The preparation steps are the same as that of Zn-MoS in Example 1 2 The preparation method of the solution, the difference is: ZnCl 2 The addition amount of ascorbic acid solution is 0.008g, the addition amount of ascorbic acid solution is 4mL, Na 2 MoO 4 The amount of solution added was 1.0 mL and Na 2 The amount of S added was 0.02 g, and the reaction was carried out at 220° C. for 12 hours.

[0057] (2) Preparation of ECL working electrode W1:

[0058] The preparation steps are the same as those of W1 in Example 1, except that the Zn-MoS prepared in (1) in this example is used 2 Modify the electrode; the concentration of luminol in the electrolyte is 5 mmol / L, the concentration of sulfuric acid is 0.5 mol / L, and the cycle is 25 cycles when performing electrochemical deposition by c...

Embodiment 3

[0066] Example 3 A hydrogen peroxide enzyme-free sensor based on a molybdenum sulfide composite material, the specific preparation steps are:

[0067] (1) Zn-MoS 2 Preparation of:

[0068] The preparation steps are the same as that of Zn-MoS in Example 1 2 The preparation method of the solution, the difference is: ZnCl 2 The addition amount of ascorbic acid solution is 0.01g, the addition amount of ascorbic acid solution is 6mL, Na 2 MoO 4 The amount of solution added was 1.5mL and Na 2 The amount of S added was 0.03 g, and the reaction was carried out at 220° C. for 12 hours.

[0069] (2) Preparation of ECL working electrode W1:

[0070] The preparation steps are the same as those of W1 in Example 1, except that the Zn-MoS prepared in (1) in this example is used 2 Modify the electrode; the concentration of luminol in the electrolyte is 10mmol / L, the concentration of sulfuric acid is 1.0mol / L, and the electrochemical deposition is carried out by cyclic voltammetry, and ...

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Abstract

The invention discloses a preparation method for a non-enzymatic difunctional hydrogen peroxide sensor established based on a molybdenum sulfide composite. The prepared sensor is easy to operate, convenient to carry, high in detection speed and low in cost and can be used for rapidly and sensitively detecting hydrogen peroxide in the fields of routine production, life and the like.

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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IPC IPC(8): G01N27/36G01N27/32
CPCG01N27/32G01N27/36
Inventor 张勇孙旭任祥朱文娟杜斌
Owner UNIV OF JINAN
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