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Preparation method and applications of flexible and high-selectivity non-enzymatic uric acid electrode carbon fiber membrane of self-supporting carbon fiber

A carbon fiber membrane and high-selectivity technology, applied in the field of electrochemistry, can solve problems such as no public reports, and achieve significant economic and social benefits, high flexibility, and fast measurement results

Active Publication Date: 2020-03-13
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The obtained carbon fiber membrane has the characteristics of good flexibility and easy processing, and can be directly used as an electrode material. It has good electrocatalytic activity for the oxidation of UA, but there has been no public report so far.

Method used

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  • Preparation method and applications of flexible and high-selectivity non-enzymatic uric acid electrode carbon fiber membrane of self-supporting carbon fiber
  • Preparation method and applications of flexible and high-selectivity non-enzymatic uric acid electrode carbon fiber membrane of self-supporting carbon fiber
  • Preparation method and applications of flexible and high-selectivity non-enzymatic uric acid electrode carbon fiber membrane of self-supporting carbon fiber

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of flexible, highly selective non-enzymatic uric acid electrode carbon fiber film preparation method of self-supporting carbon fiber of the present invention, in concrete implementation, polyacrylonitrile (Polyacrylonitrile, namely PAN) is dissolved in N,N-dimethylformamide (N,N-dimethylformamide, ie DMF), to make an electrospinning precursor containing polyacrylonitrile mass concentration of 12%, by applying a 10kv voltage between the needle and the aluminum foil collector to carry out electrospinning, from the needle to the receiver The distance between the spinners was 10cm, and the flow rate of the precursor was 0.5mL / h; after spinning, the prepared polymer nanofiber membrane was dried in a vacuum oven at 60°C for 12h to make the N,N-dimethylformaldehyde The amide was volatilized; and then the dried polymer nanofiber membrane was put into a quartz tube furnace for heat treatment. First, the temperature was raised to 250°C in the air at a rate of 0.5°C / min, and...

Embodiment 2

[0020] The invention discloses a flexible and highly selective non-enzymatic uric acid electrode carbon fiber membrane preparation method for self-supporting carbon fibers, which comprises dissolving polyacrylonitrile in N,N-dimethylformamide to make polyacrylonitrile containing polyacrylonitrile with a mass concentration of 11 % electrospinning precursor, electrospinning was carried out by applying a voltage of 9kv between the needle and the aluminum foil collector, the distance from the needle to the receiver was 9cm, and the flow rate of the precursor was 0.5mL / h; after spinning, the The prepared polymer nanofiber membrane was dried in a vacuum oven at 59°C for 13 hours to volatilize N,N-dimethylformamide; then the dried polymer nanofiber membrane was placed in a quartz tube furnace for heat treatment , first in the air at a heating rate of 0.5 °C / min to 245 °C, holding for 4.3 hours to shape the fiber, then in a nitrogen atmosphere at a heating rate of 2 °C / min to 770 °C, h...

Embodiment 3

[0026] The invention discloses a flexible and highly selective non-enzymatic uric acid electrode carbon fiber membrane preparation method for self-supporting carbon fibers, which comprises dissolving polyacrylonitrile in N,N-dimethylformamide to produce a polyacrylonitrile containing polyacrylonitrile with a mass concentration of 13 % electrospinning precursor, electrospinning was carried out by applying a voltage of 11kv between the needle and the aluminum foil collector, the distance from the needle to the receiver was 11cm, and the flow rate of the precursor was 0.5mL / h; after spinning, the The prepared polymer nanofiber membrane was dried in a vacuum oven at 61°C for 11.5 hours to volatilize N,N-dimethylformamide; then the dried polymer nanofiber membrane was placed in a quartz tube furnace for For heat treatment, first raise the temperature in the air to 255°C at a rate of 0.5°C / min, keep the temperature for 3.8 hours to shape the fiber, then raise the temperature to 830°C...

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Abstract

The invention relates to a preparation method and applications of a flexible and high-selectivity non-enzymatic uric acid electrode carbon fiber membrane of self-supporting carbon fiber, wherein the flexible and high-selectivity non-enzyme uric acid electrode carbon fiber membrane of self-supporting carbon fibers is prepared and is used as an electrochemical sensor modification electrode to directly and rapidly determine non-enzymatic uric acid. The method comprises the following steps: dissolving PAN in DMF to prepare an electrospinning precursor with a PAN mass concentration of 10-14%, applying a voltage between a needle and an aluminum foil collector, carrying out electrospinning, carrying out vacuum drying on the prepared polymer nanofiber membrane to volatilize DMF, putting the carbonfiber membrane into a quartz tube furnace, carrying out heat treatment, cooling to a room temperature, fixing the obtained carbon fiber membrane by using a platinum electrode clamp, exposing, immersing into an H2SO4 solution, and activating by using a cyclic voltammetry to obtain a flexible carbon fiber membrane. With the application of the flexible and high-selectivity non-enzymatic uric acid electrode carbon fiber membrane as a non-enzyme UA sensor electrode, the electrode has characteristics of rapid determination, sensitivity, accuracy, stability, environmental protection and the like, and is an innovation in non-enzyme UA sensor measurement.

Description

technical field [0001] The present invention relates to electrochemistry, especially a preparation method and application of a self-supporting carbon fiber flexible, highly selective non-enzymatic uric acid electrode carbon fiber membrane, which is suitable for using it as an electrochemical sensor and can be directly used for non-enzymatic uric acid in modified electrodes rapid determination. Background technique [0002] Uric acid (UA) is an important biomarker in the human body and is the final product of purine metabolism. Insufficient levels of uric acid in serum and urine can lead to symptoms of multiple sclerosis, AIDS and diabetes, while high levels of uric acid can lead to gout, arthritis, obesity, severe hepatitis, neurological disorders, cardiovascular and renal diseases. Therefore, a new type of flexible sensor that is easy to use, low in cost, and can be directly used in on-site detection or monitoring points is more and more important. However, traditional ri...

Claims

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Application Information

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IPC IPC(8): C01B32/05D01F9/22G01N27/30G01N27/48
CPCC01B32/05G01N27/308G01N27/48D01F9/22Y02E60/13
Inventor 李勇张玉新殷利迎彭进白文娟张瑞珠段定定丁亚平
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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