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Flexible three-dimensional nano bioelectrode and preparation method thereof

A three-dimensional nano, bio-electrode technology, applied in the intersection of nano-materials and biotechnology, can solve the problems of low output power, poor stability, short life, etc., to increase the solid load, improve adaptability, and promote development.

Inactive Publication Date: 2014-11-05
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current "sugar" batteries have short lifespan, low output power, and poor stability, which limit the practical application of "sugar" batteries.

Method used

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  • Flexible three-dimensional nano bioelectrode and preparation method thereof
  • Flexible three-dimensional nano bioelectrode and preparation method thereof
  • Flexible three-dimensional nano bioelectrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment provides a method for preparing a flexible three-dimensional nano-bioelectrode, which is characterized in that it comprises the following steps:

[0036] 1) Preparation of graphene oxide: sequentially take 5g of nano-graphite powder, 170mL of concentrated sulfuric acid and 3g of NaNO 3 After mixing, ice bath. When the temperature is lower than 15°C, slowly add 30g of KMnO 4 , and ensure that the temperature does not exceed 30 ° C, stirring for 2 hours. Then, the temperature of the mixed system was raised to 35° C., and the reaction was kept for 2 hours. Then add 200 mL of ultrapure water and continue stirring. After 1 h, add 400 mL of ultrapure water and appropriate amount of H 2 o 2 , a brownish-yellow solution was obtained. The solution was vacuum filtered and the filter cake was washed successively with 5% dilute hydrochloric acid and ultrapure water. Then the washed filter cake was diluted with a certain amount of ultrapure water, and poured i...

Embodiment 2

[0046] This example is roughly the same as Example 1, except that, after adding TEOS in step 3), the stirring time is extended from 6 hours to 12 hours. Macroporous-Mesoporous SiO 2 The pore wall of the / graphene composite material is slightly thicker than that of Example 1, but there is no obvious change in the electrochemical test after the glucose oxidase is finally immobilized. Glucose oxidase in the carrier material can also be catalytically responsive to glucose in solution.

Embodiment 3

[0048] This example is roughly the same as Example 1, except that in step 5), after the carrier material suspension, glucose oxidase solution and CTAB solution are mixed, the stirring is extended to 6 hours. Based on the modification of the above experimental data, when the carrier material is loaded with glucose oxidase, the peak current of the redox peak in the cyclic voltammetry curve obtained under the same test conditions as in Example 1 has a certain increase compared to Example 1 ( See Figure 7 ). Glucose oxidase in the carrier material can also be catalytically responsive to glucose in solution.

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Abstract

The invention provides a flexible three-dimensional nano bio electrode and a preparation method thereof. The bioelectrode includes a flexible electrode substrate material, a carrier material adhered to the surface of the substrate material and enzyme supported on the carrier material. The carrier material is compounded by graphene with three-dimensional macroporous structure and mesoporous carbon bonded on the graphene surface; the mesoporous carbon is distributed in the surface of tunnel structure of the graphene; and the enzyme is glucose oxidase. The bioelectrode provided by the invention has the following advantages: the carrier with conductivity is beneficial to the transfer of electrons generated by catalysis of glucose oxidase to the electrode through the carrier material; the carrier material with larger specific surface area is conducive to the increase of immobilization amount of glucose oxidase on the carrier material in unit volume; and the carrier material with three-dimensional pore structure is conducive to the spread of solution, and can ensure that all the glucose oxidase in the carrier material conducts catalytic reaction. The invention can greatly promote the development of flexible green electronic products and implantable medical devices.

Description

technical field [0001] The invention relates to the intersection field of nanomaterials and biotechnology, in particular to a flexible three-dimensional nanobiological electrode and a preparation method thereof. Background technique [0002] Biofuel cell is a green and sustainable energy conversion device, which has the advantages of high conversion efficiency, wide range of fuel sources, clean and pollution-free, and is widely used in batteries, medicine and other fields. Among them, the enzyme biofuel cell driven by natural sugar as fuel can also be called "sugar" battery, which has greater practical significance in biological devices and medical equipment. However, the current "sugar" batteries have short lifespan, low output power, and poor stability, which limit the practical application of "sugar" batteries. At the same time, with the development of smart electronics and biomedicine, there will be more and more demands for flexible devices in the future. Therefore, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88B82Y5/00B82Y40/00
CPCB82Y5/00B82Y40/00H01M4/8605H01M4/8825H01M4/9075Y02E60/50
Inventor 阳晓宇沈凌卢毅姜楠苏宝连
Owner WUHAN UNIV OF TECH
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