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Preparation method and application of electrochemical sensor of highly dispersed graphene/Zn-based metal organic framework composite material

An organic framework and composite material technology, applied in the field of chemistry, can solve the problems of easy agglomeration into large particles, low dispersion, insufficient performance of graphene, etc., and achieve the effects of low price, low detection limit, and low production cost.

Inactive Publication Date: 2019-01-25
ANYANG NORMAL UNIV
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Problems solved by technology

However, graphene has a low degree of dispersion in aqueous solution and organic solvent, and is easy to agglomerate into large particles, and the excellent performance of graphene cannot be fully reflected.

Method used

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  • Preparation method and application of electrochemical sensor of highly dispersed graphene/Zn-based metal organic framework composite material
  • Preparation method and application of electrochemical sensor of highly dispersed graphene/Zn-based metal organic framework composite material
  • Preparation method and application of electrochemical sensor of highly dispersed graphene/Zn-based metal organic framework composite material

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Embodiment Construction

[0028]The present invention is described in detail below, for the convenience of comparison, the applicant at first carried out the preparation of Zn-based metal-organic framework, the method is as follows: 300 mg of Zn(NO 3 ) 2 · 6H 2 O soluble salt and 350 mg of organic ligand 2-methylimidazole, 1.0 g PVP, 200 mL methanol were evenly mixed, stirred at room temperature for 10 h, and the reaction precipitate was centrifuged at 4000 rpm to separate the precipitate, anhydrous Washed three times with ethanol and dried under vacuum at 30°C. The morphology of the as-synthesized materials was characterized by scanning electron microscopy, as shown in figure 2 shown. figure 2 The spherical Zn-MOF structure with regular morphology is clearly shown, indicating that the synthesis method adopted in the present invention well maintains the typical structure of Zn-MOF;

[0029] The preparation method of the electrochemical sensor of highly dispersed graphene / Zn-based metal-organic f...

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Abstract

A preparation method of an electrochemical sensor of a highly dispersed graphene / Zn-based metal organic framework composite material comprises the following steps: the step A of preparation of the highly dispersed graphene; the step B of preparation of a highly dispersed graphene supported Zn-based metal organic framework composite material; the step C of preparation of the electrochemical sensor.Application of the electrochemical sensor of the highly dispersed graphene / Zn-based metal organic framework composite material is also provided and directly used for electrochemical detection of hydrogen peroxide in the following method: utilizing the electrochemical sensor as a working electrode, Ag / AgCl as a reference electrode and a platinum wire electrode as an auxiliary electrode to form a three-electrode system; placing the three-electrode system in a phosphate buffer solution; recording a current-time curve at the constant potential of -0.40 V, and adding hydrogen peroxide to the phosphate buffer solution to obtain the hydrogen peroxide concentration according to the current. The electrochemical sensor is simple, accurate, low in cost and fast in detection.

Description

technical field [0001] The invention relates to a preparation method of a non-enzyme hydrogen peroxide electrochemical sensor of a highly dispersed graphene / Zn-based metal-organic framework composite material, belonging to the field of chemistry. Background technique [0002] h 2 o 2 It is involved in many important biological and chemical reactions and plays an important role in many fields, such as food, pharmaceutical, industrial and environmental analysis. Therefore, it is necessary to establish a reliable, sensitive, rapid and real-time detection of H 2 o 2 Methods. In the electrochemical method, the participation of electrochemical sensors and enzymes will accelerate the electrode and H 2 o 2 electron transfer between them. However, there are some common problems in enzyme-based sensors, such as expensive experimental materials, poor electrode stability, harsh operating environment requirements, complex electrode preparation and fixing procedures, easy deteriora...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48G01N27/416
CPCG01N27/308G01N27/4166G01N27/48
Inventor 杨素玲李刚谭瑞凡刘盼盼郭紫玲王宇欣
Owner ANYANG NORMAL UNIV
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