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

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

Inactive Publication Date: 2019-02-22
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 highly dispersed graphene/Fe-based metal organic framework composite material electrochemical sensor
  • Preparation method and application of highly dispersed graphene/Fe-based metal organic framework composite material electrochemical sensor
  • Preparation method and application of highly dispersed graphene/Fe-based metal organic framework composite material electrochemical sensor

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Embodiment Construction

[0024] For the convenience of comparison, the preparation of Fe-based metal-organic framework was carried out in this example: Fe(NO 3 ) 3 9H 2 O200 mg, organic ligand terephthalic acid 400 mg, and PVP 1g were added to the solvent N,N-dimethylformamide, stirred evenly at room temperature, transferred to a reaction kettle, and the reaction temperature was controlled at 100°C for 11 h , after centrifugation, washing with absolute ethanol three times, and vacuum drying at 30°C, a hexagonal bipyramidal Fe-MOF with regular morphology was obtained; the morphology of the synthesized material was characterized by scanning electron microscopy, as shown in figure 2 shown. figure 2 The regular hexagonal bipyramidal Fe-MOF structure is clearly shown, indicating that the synthesis method used in the present invention well maintains the typical structure of Fe-MOF.

[0025] The preparation method of the non-enzymatic hydrogen peroxide electrochemical sensor of highly dispersed graphene...

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Abstract

The invention relates to a preparation method of a highly dispersed graphene / Fe-based metal organic framework composite material electrochemical sensor. The preparation method comprises the followingsteps: A, preparing highly dispersed graphene; B, preparing a highly dispersed graphene activated Fe-MOF electrode material; and C, preparing the electrochemical sensor. The application of the highlydispersed graphene / Fe-based metal organic framework composite material electrochemical sensor comprises the following steps: (1) forming a three-electrode system by taking the highly dispersed graphene / Fe-based metal organic framework composite material electrochemical sensor as a working electrode, an Ag / AgCl as a reference electrode and a platinum wire electrode as an auxiliary electrode; putting the three-electrode system in a phosphate buffer solution; and successively adding a hydrogen peroxide solution into the phosphate buffer solution at a constant level of -0.40 V. The invention provides the simple, accurate and low cost quickly detected electrochemical sensor.

Description

technical field [0001] The invention relates to a preparation method of a non-enzyme hydrogen peroxide electrochemical sensor of a highly dispersed graphene / Fe-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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/16B01J31/22G01N27/30G01N27/48
CPCG01N27/308G01N27/48B01J31/1691B01J31/2239B01J2531/842B01J35/33
Inventor 杨素玲李刚郭紫玲王宇欣谭瑞凡刘盼盼
Owner ANYANG NORMAL UNIV
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