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Surface graphene graphite-based carbon material and preparation method and application thereof

A graphite-based, carbon material technology, applied in the analysis of materials, material electrochemical variables, material analysis by electromagnetic means, etc. The effect of detection limit

Inactive Publication Date: 2019-08-16
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of complex and time-consuming use of graphite-based carbon materials in the prior art as electrodes, low sensitivity, high interference, and easy fouling on the electrode surface, and to provide a surface graphene-based graphite-based carbon material and Its preparation method and application, the present invention mainly causes the graphite on the surface of the graphite-based carbon material to be peeled off by controlling the process conditions of electrochemical stripping, and graphene is formed, but the formed graphene has not yet fallen off, and is still attached to the graphite-based carbon material. surface, and finally prepared a surface graphenized graphite-based carbon material

Method used

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  • Surface graphene graphite-based carbon material and preparation method and application thereof
  • Surface graphene graphite-based carbon material and preparation method and application thereof
  • Surface graphene graphite-based carbon material and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0037] The preparation method of surface graphene graphite rod, the main steps are as follows:

[0038] (1) Using a two-electrode system, graphite rods and Pt sheets are used as anode and cathode respectively, and the area immersed in the solution is controlled with a raw material tape (the length of each graphite rod immersed in the solution is 5 mm), and the graphite rod and the Pt sheet are connected by conductive copper wire. connected to the electrochemical workstation;

[0039] (2) at 1.0mol L -1 In the NaOH solution of NaOH, the surface layer of the graphite rod is electrochemically delaminated by i-t curve technology to generate graphene. Under the polarization voltage of 2V and the polarization duration of 40s, the graphite rod of the anode is converted into surface graphene at room temperature Graphite rods.

[0040] The finally obtained surface graphenized graphite rod is mainly composed of graphite rod and graphene attached to the surface of the graphite rod, and...

Embodiment 2

[0042] The preparation method of surface graphenized graphite sheet, the main steps are as follows:

[0043] (1) Use a two-electrode system, use the graphite sheet and the Pt sheet as the anode and the cathode respectively, use a raw material tape to control the area immersed in the solution, and use a conductive copper wire to connect the graphite sheet to the electrochemical workstation;

[0044] (2) at 2.0mol L -1 H 2 SO 4 The i-t curve technique is used in the solution to perform electrochemical in-situ layering on the surface of graphite flakes to generate graphene. Under the polarization voltage of 3V and the polarization duration of 300s, the graphite flakes of the anode are converted into surface graphenized graphite at room temperature piece.

[0045] The finally prepared surface graphenized graphite sheet is mainly composed of graphite sheet and graphene attached to the surface of the graphite sheet, and the graphite sheet and graphene are combined by intermolecul...

Embodiment 3

[0047] The preparation method of surface graphene graphite paper, main steps are as follows:

[0048] (1) Use a two-electrode system, use graphite paper and Pt sheet as anode and cathode respectively, use a raw material tape to control the area immersed in the solution, and use conductive copper wire to connect the graphite paper to the electrochemical workstation;

[0049] (2) At 5.0mol·L -1 The surface layer of graphite paper is electrochemically delaminated in situ by i-t curve technology in HCl solution to generate graphene. Under the polarization voltage of 3.5V and the polarization duration of 100s, the graphite paper of the anode is converted into surface graphite at room temperature Graphite paper.

[0050] The finally prepared surface graphenized graphite paper is mainly composed of graphite paper and graphene attached to the surface of the graphite paper, and the graphite paper and graphene are combined by intermolecular force.

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Abstract

The invention relates to a surface graphene graphite-based carbon material and a preparation method and application thereof. The preparation method includes stripping graphite on the surface layer ofthe graphite-based carbon material as graphene by adopting an electrochemical stripping method to prepare the graphite-based carbon material with graphene attached to the surface; the finally preparedsurface graphene graphite-based carbon material is mainly formed by a graphite-based carbon material and graphene attached to the surface thereof, and the graphite-based carbon material and the graphene are combined through an intermolecular acting force; and the application of the prepared surface graphene graphite-based carbon material includes fabrication of electrochemical sensors by regarding the surface graphene graphite-based carbon material as an operating electrode for detection of small molecules with electroactivity. According to the surface graphene graphite-based carbon material,the preparation method is simple and feasible, the application range is wide, and the electrochemical sensor prepared by the surface graphene graphite-based carbon material is advantaged by high sensitivity, low limit of detection and high detection recovery rate.

Description

technical field [0001] The invention belongs to the technical field of electrochemical sensors, and relates to a surface graphenized graphite-based carbon material and a preparation method and application thereof. Background technique [0002] Dopamine is an important neurotransmitter in the central nervous system and hormone system, and is closely related to human emotional control, hormone balance and exercise regulation. Scientists have confirmed that abnormal concentrations of dopamine can cause various diseases, such as Parkinson's disease, schizophrenia, Alzheimer's disease and depression. Therefore, the development of accurate measurement techniques for dopamine is of great significance for the diagnosis and monitoring of diseases. Nowadays, a large number of detection methods have been proposed, including high-performance liquid chromatography, gas chromatography-mass spectrometry, fluorescence measurement, and electrochemical methods to detect the concentration of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/308G01N27/48
Inventor 张丽娟樊学学盛天都赵冬青陆杰袁海宽刘锡建刘凤娇
Owner SHANGHAI UNIV OF ENG SCI
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