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Composite three-dimensional graphene electrode as well as preparation method and application thereof

A graphene electrode, three-dimensional technology, applied in the direction of electrochemical variables of materials, nanotechnology for sensing, material analysis through electromagnetic means, etc., can solve the problem of weak binding force between VMSF and three-dimensional graphene electrodes, and achieve excellent Good electron conductivity, good electron transfer performance, and the effect of improving binding ability

Active Publication Date: 2021-01-19
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The object of the present invention is to provide a composite three-dimensional graphene electrode that is stably modified on a three-dimensional graphene electrode substrate by a nanometer uniform porous film of silicon dioxide, so as to overcome the problem of weak binding force between VMSF and three-dimensional graphene electrodes in the prior art

Method used

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  • Composite three-dimensional graphene electrode as well as preparation method and application thereof
  • Composite three-dimensional graphene electrode as well as preparation method and application thereof
  • Composite three-dimensional graphene electrode as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0058] 1. Preparation of VMSF / pl-3DG electrode

[0059] 1. Preparation of three-dimensional graphene electrode 3DG

[0060] Three-dimensional graphene was prepared by chemical vapor deposition at 1100 °C using porous nickel foam as a template and methane as a carbon source.

[0061] 2. Using plasma to process three-dimensional graphene, wherein the plasma is air plasma, and its generation condition is a vacuum degree of 10Pa and a power of 100W (PlasmaDyne Pro 1000s). The three-dimensional graphene electrode 3DG prepared in step 1 was placed in a plasma environment for 1 minute to obtain a plasma-treated three-dimensional graphene electrode (pl-3DG).

[0062] 3. Using the electrochemical assisted self-assembly method to rapidly prepare silica nanometer homoporous films on the surface of plasma-treated three-dimensional graphene electrodes.

[0063] Specifically, the precursor solution is prepared: in 20mL ethanol solution and 20mL 0.1M sodium nitrate (NaNO 3 ) solution was ...

Embodiment 2

[0083] 1. Preparation of VMSF / pl-3DG electrode

[0084] 1. Three-dimensional graphene electrode materials were purchased from Xianfeng Nano Materials Co., Ltd.

[0085]2. Using plasma to process three-dimensional graphene, wherein the plasma is oxygen plasma, and its generation condition is a vacuum degree of 12Pa and a power of 100W. The three-dimensional graphene electrode was placed in a plasma environment for 15 seconds to obtain a plasma-treated three-dimensional graphene electrode (pl-3DG).

[0086] 3. Using the electrochemical assisted self-assembly method to quickly prepare a silicon dioxide nanometer homoporous film on the surface of the plasma-treated three-dimensional graphene electrode to obtain the composite three-dimensional graphene electrode.

[0087] Specifically, the precursor solution is prepared: in 20mL ethanol solution and 20mL 0.1M sodium nitrate (NaNO 3 ) solution was added 13.6mmol TEOS and 4.35mmol CTAB, the pH of the solution was adjusted to 3.0 wi...

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Abstract

The invention discloses a composite three-dimensional graphene electrode and a preparation method and application thereof, and belongs to the field of new materials. The preparation method of the composite three-dimensional graphene electrode comprises the following steps: (1) treating the surface of a three-dimensional graphene electrode by using plasma to obtain a plasma-treated three-dimensional graphene electrode; and (2) preparing a silicon dioxide nano uniform-pore film on the surface of the three-dimensional graphene electrode subjected to plasma treatment to prepare the composite three-dimensional graphene electrode. According to the method, the hydrophilicity and electrochemical properties of the three-dimensional graphene electrode are improved through plasma treatment, the binding force with VMSF is improved, and the silicon dioxide nano uniform-pore film is stably modified on a three-dimensional graphene electrode substrate. In combination with the enrichment effect of thethree-dimensional graphene substrate and the VMSF and the anti-pollution / anti-interference capability of the VMSF, the mesoporous silica homogeneous membrane / three-dimensional graphene electrode provided by the invention has huge potential in direct detection of electrochemical organic small molecules in a complex sample.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a method for preparing a composite three-dimensional graphene electrode by using plasma to treat a three-dimensional graphene electrode to realize the stable modification of a nanometer porous film of silicon dioxide on a three-dimensional graphene electrode substrate. Background technique [0002] Direct, rapid and sensitive detection of drugs and biomarkers in complex biological samples is crucial for clinical diagnosis, health monitoring and treatment evaluation. Current methods for detecting these drugs or biomarkers mainly include high performance liquid chromatography, gas chromatography, spectrophotometry, and the like. However, biological samples have the characteristics of complex matrix and low abundance of active components, so the above analysis methods usually require complex and time-consuming pretreatments such as separation and enrichment of samples before detection. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48B82Y15/00B82Y40/00
CPCG01N27/308G01N27/48B82Y15/00B82Y40/00
Inventor 刘吉洋黄洁马欣妤奚凤娜
Owner ZHEJIANG SCI-TECH UNIV
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