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Three-dimensional porous graphene-based electrochemical electrode material, preparation and application thereof

A three-dimensional porous, electrode material technology, applied in the field of electrochemistry, can solve problems such as overlapping, agglomeration, and affecting the repeatability and stability of sensors, and achieve the effects of good repeatability, inhibition of agglomeration, and good application potential

Active Publication Date: 2019-09-03
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the graphene oxide or three-dimensional graphene used in these patents has agglomeration and overlapping phenomena during the application process, which greatly affects the repeatability and stability of the sensor.

Method used

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  • Three-dimensional porous graphene-based electrochemical electrode material, preparation and application thereof
  • Three-dimensional porous graphene-based electrochemical electrode material, preparation and application thereof
  • Three-dimensional porous graphene-based electrochemical electrode material, preparation and application thereof

Examples

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Effect test

Embodiment 1

[0034] Adopt hydrothermal method to prepare three-dimensional porous graphene material, concrete steps are: get 10mL graphene oxide (2mg / mL) aqueous solution, add 1mL hydrogen peroxide solution (0.75wt.%), ultrasonic treatment 10min, then graphene oxide and The mixed solution of hydrogen peroxide was transferred to a high-pressure reactor and reacted at a high temperature of 180°C for 4 hours. The resulting product was immersed in ultrapure water and washed for 2 days to remove excess hydrogen peroxide impurities, and then quickly frozen in liquid nitrogen and placed in a Freeze-drying was continued for 12 hours in a freeze-dryer to obtain a solid three-dimensional porous graphene material.

[0035] The three-dimensional porous graphene-based electrochemical electrode material was prepared by the following steps: 6 μL of three-dimensional porous graphene suspension (0.1 mg / mL) was added dropwise to the center of the electrode substrate, and vacuum-dried at room temperature to o...

Embodiment 2

[0037] Adopt hydrothermal method to prepare three-dimensional porous graphene material, concrete steps are: get 10mL graphene oxide (2mg / mL) aqueous solution, add 1mL hydrogen peroxide solution (0.5wt.%), ultrasonic treatment 13min, then graphene oxide and The mixed solution of hydrogen peroxide was transferred to a high-pressure reactor, and reacted at a high temperature of 180°C for 5 hours. The resulting product was immersed in ultrapure water and washed for 2 days to remove excess hydrogen peroxide impurities, and then quickly frozen in liquid nitrogen and placed in Freeze-drying was continued for 12 hours in a freeze-dryer to obtain a three-dimensional porous graphene material solid.

[0038] Three-dimensional porous graphene-based electrochemical electrode materials were prepared by the following steps: 6 μL of three-dimensional porous graphene suspension (0.2 mg / mL) was added dropwise to the center of the electrode substrate, and vacuum-dried at room temperature to obtai...

Embodiment 3

[0049] Adopt hydrothermal method to prepare three-dimensional porous graphene material, concrete steps are: get 10mL graphene oxide (2mg / mL) aqueous solution, add 1mL hydrogen peroxide solution (0.75wt.%), ultrasonic treatment 15min, then graphene oxide and The mixed solution of hydrogen peroxide was transferred to a high-pressure reactor, and reacted at a high temperature of 180°C for 6 hours. The resulting product was immersed in ultrapure water and washed for 2 days to remove excess hydrogen peroxide impurities, and then quickly frozen in liquid nitrogen and placed in a Freeze-drying was continued for 12 hours in a freeze-dryer to obtain a three-dimensional porous graphene material solid.

[0050] Three-dimensional porous graphene-based electrochemical electrode materials were prepared by the following steps: 6 μL of three-dimensional porous graphene suspension (0.3 mg / mL) was added dropwise to the center of the electrode substrate, and vacuum-dried at room temperature to ob...

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Abstract

The invention relates to a three-dimensional porous graphene-based electrochemical electrode material, a preparation and application thereof. Three-dimensional porous graphene is prepared by hydrothermal method, and has abundant three-dimensional micron-pores and two-dimensional in-plane nanopores, the three-dimensional porous graphene-based electrochemical electrode material is obtained by: adding a suspension of the above graphene dropwise to the center of a substrate, and conducting vacuum pumping and drying at room temperature. The three-dimensional porous graphene-based electrochemical electrode material provided by the invention can be applied to electrochemical sensors to detect the content of ascorbic acid, uric acid or nitrite, and has the advantages of high sensitivity, short response time, strong anti-interference ability, good repeatability, good long-term stability and high recovery rate.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and relates to a three-dimensional porous graphene-based electrochemical electrode material, a preparation method and its application in electrochemical sensors. Background technique [0002] Electrochemically active biomolecules such as ascorbic acid (AA), uric acid (UA), and nitrite play important roles in human life. Among them, ascorbic acid, also known as vitamin C, is an important compound in the synthesis of collagen, cartilage, tendons, blood vessels and neurotransmitters. Abnormal levels of it can be used to diagnose many diseases, such as diabetes, high cholesterol, kidney, nervous system diseases and others. Various diseases; uric acid is the end product of purine metabolism. If there is too much uric acid in the body to excrete or the uric acid excretion mechanism degrades, the body will retain too much uric acid, which will easily lead to acidification of body fluids and aff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184B82Y15/00B82Y30/00G01N27/30G01N27/327G01N27/48
CPCB82Y15/00B82Y30/00C01B32/184G01N27/308G01N27/3277G01N27/48
Inventor 张艳陈振斐周健贾广雯章路
Owner SHANGHAI UNIV OF ENG SCI
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