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Conductive polymer biosensor electrode material and preparation method and application thereof

A biosensor and conductive polymer technology, applied in the field of conductive polymer biosensor electrode materials and its preparation, can solve the problems of increasing catalytic sites, long preparation process, side reactions of metal transition accumulation, etc., to achieve increased catalytic sites , easy to achieve mass production, short time-consuming effect

Active Publication Date: 2022-04-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Invention patent CN 111505078A applied to design the electrode surface into a nanowire array structure, thereby increasing the catalytic sites, but the preparation process took a very long time
Invention patent CN 113203782A applies for compounding metal nanoparticles such as platinum, palladium and gold on the screen electrode to enhance the catalytic performance of the electrode, but there is a problem of side reactions caused by metal transition accumulation

Method used

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  • Conductive polymer biosensor electrode material and preparation method and application thereof
  • Conductive polymer biosensor electrode material and preparation method and application thereof
  • Conductive polymer biosensor electrode material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A preparation method of conductive polymer biosensor electrode material, comprising the following steps:

[0047](1) Pretreatment of biomedical titanium sheets: use sandpaper to polish biomedical titanium sheets (diameter 10 mm) to remove the surface oxide layer, and clean the titanium sheets with deionized water, 99.7% absolute ethanol and 99.5% acetone for 10 minutes each , dry for later use;

[0048] (2) Preparation of the PPy nucleation layer: use Zahner electrochemical workstation in Germany, select the three-electrode mode, take the saturated calomel electrode (SCE) as the reference electrode, the copper sheet as the counter electrode, and the biomedical titanium sheet with a diameter of 10 mm as the The working electrode, together with the aqueous solution containing 0.25mol / L hydrochloric acid and 0.2mol / L pyrrole as the electrolyte, constitutes a small electrochemical cell. Using the chronocurrent constant voltage method, react with a voltage of 0.8V (vs SCE) ...

Embodiment 2

[0053] A preparation method of conductive polymer biosensor electrode material, comprising the following steps:

[0054] (1) Pretreatment of biomedical titanium sheets: use sandpaper to polish biomedical titanium sheets (diameter 10 mm) to remove the surface oxide layer, and clean the titanium sheets with deionized water, 99.7% absolute ethanol and 99.5% acetone for 10 minutes each , dry for later use;

[0055] (2) Preparation of the PPy nucleation layer: use Zahner electrochemical workstation in Germany, select the three-electrode mode, take the saturated calomel electrode (SCE) as the reference electrode, the copper sheet as the counter electrode, and the biomedical titanium sheet with a diameter of 10 mm as the The working electrode, together with the aqueous solution containing 0.25mol / L hydrochloric acid and 0.2mol / L pyrrole as the electrolyte, constitutes a small electrochemical cell. Using the chronocurrent constant voltage method, react with a voltage of 0.8V (vs SCE)...

Embodiment 3

[0061] A preparation method of conductive polymer biosensor electrode material, comprising the following steps:

[0062] (1) Pretreatment of biomedical titanium sheets: use sandpaper to polish biomedical titanium sheets (diameter 10 mm) to remove the surface oxide layer, and clean the titanium sheets with deionized water, 99.7% absolute ethanol and 99.5% acetone for 10 minutes each , dry for later use;

[0063] (2) Preparation of the PPy nucleation layer: use Zahner electrochemical workstation in Germany, select the three-electrode mode, take the saturated calomel electrode (SCE) as the reference electrode, the copper sheet as the counter electrode, and the biomedical titanium sheet with a diameter of 10 mm as the The working electrode, together with the aqueous solution containing 0.25mol / L hydrochloric acid and 0.2mol / L pyrrole as the electrolyte, constitutes a small electrochemical cell. Using the chronocurrent constant voltage method, react with a voltage of 0.8V (vs SCE)...

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Abstract

The invention discloses a conductive polymer biosensor electrode material as well as a preparation method and application thereof. A simple template-free method is adopted, firstly, a dopamine-doped conductive polypyrrole nanowire coating is deposited on a biomedical titanium sheet, then silver ions are chelated on polypyrrole by using the chelation of dopamine, then silver nanoparticles are generated through accelerated reduction by a photo-reduction method, and the PPy / AgNPs composite electrode is obtained. The electrode can be used as an enzyme-free glucose biosensor electrode. The preparation method is simple in process, low in cost, short in time consumption and easy to realize mass production. The prepared biosensor can respond to full-wave-band sunlight, the detection linear range is obviously expanded, and the electrode current response is enhanced, so that the defects of a traditional enzyme-free electrochemical sensor in the aspect of detection performance are overcome, and the glucose concentration can be efficiently, sensitively and stably detected for a long time.

Description

technical field [0001] The invention belongs to the technical field of biological detection, in particular to a conductive polymer biosensor electrode material and its preparation method and application. Background technique [0002] Diabetes is the dysfunction of certain tissues in the human body caused by the blood sugar concentration exceeding the normal range, and it is accompanied by many dangerous complications, such as stroke, high blood pressure, diabetic nephropathy, blindness, etc. And once suffering from it, it cannot be completely cured. It can only be controlled by regular blood glucose concentration testing and drug treatment to control blood sugar within a reasonable range. How to detect glucose concentration timely and efficiently has very important practical significance for the early diagnosis and precise control of diabetes. [0003] At present, many household blood glucose monitors have appeared on the market, and most of their core components are electr...

Claims

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Application Information

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IPC IPC(8): C08G73/06C08K3/08G01N27/26
CPCC08G73/0611C08K3/08G01N27/26C08K2003/0806C08K2201/011
Inventor 宁成云黄怡萱王珍高于鹏刘城利李梓毓李明睿张珈绮颜嘉琪
Owner SOUTH CHINA UNIV OF TECH
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