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Electrochemical transducer based on graphene oxide and preparation method thereof

A graphene and electrochemical technology, applied in the field of graphene oxide-based electrochemical sensors and their preparation, can solve the problems of complex preparation process, inconvenient use, etc., and achieve the effect of fast detection results

Inactive Publication Date: 2015-03-25
DONGGUAN QINGMAITIAN DIGITAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the biosensor has fast analysis speed and high accuracy, its preparation process is relatively complicated, and the three-electrode system is needed to analyze and test the glucose content, which is inconvenient to use

Method used

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  • Electrochemical transducer based on graphene oxide and preparation method thereof
  • Electrochemical transducer based on graphene oxide and preparation method thereof
  • Electrochemical transducer based on graphene oxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Graphene oxide was prepared by the Hummers method. Add 100mL of 98% concentrated sulfuric acid to a dry beaker, cool to 0°C with a low-temperature cooling liquid circulation pump, add 4g of natural flake graphite, 2.5g of sodium nitrate and 8g of potassium permanganate during stirring, and control the reaction temperature at Below 10°C, stir for 2h. Then place the beaker in a constant temperature water bath at about 35°C, and continue stirring for 30 minutes after the temperature of the reaction solution rises to 35°C. Finally, 200 mL of deionized water was added during stirring, the reaction temperature was controlled within 100° C., and stirring was continued for 30 min. Dilute the reaction solution to 500mL with deionized water, add an appropriate amount of 5% hydrogen peroxide solution, filter while hot, and wash thoroughly with 5% hydrochloric acid and deionized water until there is no SO in the filtrate 4 2- (with BaCl 2 The filtered supernatant is detected), ...

Embodiment 2

[0023] Embodiment 2 Adopt the method in embodiment 1 to prepare the electrochemical sensor based on graphene oxide, only difference is when preparing the aqueous solution of graphene oxide and glucose-specific enzyme, the pH value of described graphene oxide aqueous solution is adjusted to 7 . The relationship between the magnitude of the current between the working electrode 21 and the reference electrode 22 with the glucose concentration is as follows: Figure 4 shown. The relationship between the current and the glucose concentration is i(μA)=0.002C(mmol / L)+0.1309.

Embodiment 3

[0025] Embodiment 3 Adopt the method in embodiment 1 to prepare the electrochemical sensor based on graphene oxide, only difference is that when preparing the aqueous solution of graphene oxide and glucose-specific enzyme, the pH value of described graphene oxide aqueous solution is adjusted to 12 . The relationship between the magnitude of the current between the working electrode 21 and the reference electrode 22 with the glucose concentration is as follows: Figure 4 shown. The relationship between the current and the glucose concentration is i(μA)=0.0027 C(mmol / L)+0.2453.

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Abstract

The invention discloses an electrochemical transducer based on graphene oxide. The electrochemical transducer comprises a base plate, an electric conduction layer, a reaction area, a cover plate and a spacing layer , wherein the electric conduction layer is arranged on the base plate, and the spacing layer is arranged between the base plate and the cover plate and is provided with a groove with an opening; the reaction area is defined by the spacing layer with the groove, the base plate and the cover plate and is mainly prepared from the graphene oxide and glucose specific enzyme. The invention further discloses a method for preparing the electrochemical transducer based on the graphene oxide. By utilizing the preparation method, the simple and feasible electrochemical transducer with easiness in use and high analysis speed and measurement precision can be obtained.

Description

technical field [0001] The invention relates to the technical field of electrochemical sensors, in particular to an electrochemical sensor based on graphene oxide and a preparation method thereof. Background technique [0002] Graphene is a carbon atom with sp 2 The hexagonal honeycomb lattice composed of hybrid orbitals is a two-dimensional material with a thickness of only one carbon atom. Although it has a simple structure, its properties are not ordinary, mainly reflected in: high mechanical strength, up to 130Gpa, more than 100 times that of steel; carrier mobility up to 15000cm 2 / V·s, which is twice that of the currently known indium antimonide material with the highest mobility; the specific surface area is large, and the theoretical specific surface area is as high as 2630m 2 / g; In addition, it also has special properties such as room temperature quantum Hall effect and room temperature ferromagnetism. As an electrode material, graphene exhibits excellent electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26
Inventor 马莉
Owner DONGGUAN QINGMAITIAN DIGITAL TECH
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