Composite electrode and preparation method and application thereof

A technology of composite electrode and electrodeposition method, which is applied in the direction of material electrochemical variables, material analysis by electromagnetic means, and measurement devices, can solve the problems of inability to detect dopamine at the same time, difficult to distinguish, etc., and achieve easy operation and improve detection efficiency. Effect

Active Publication Date: 2021-09-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, the oxidation potentials of dopamine, serotonin and melatonin are similar, and it is difficult to distinguish them on general electrodes, that is, usually electrodes cannot detect dopamine, serotonin and melatonin at the same time

Method used

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  • Composite electrode and preparation method and application thereof
  • Composite electrode and preparation method and application thereof
  • Composite electrode and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] In this embodiment, a composite electrode is prepared, and the specific process is as follows:

[0083] S1. Modified conductive substrate with polyaniline / graphene composite layer:

[0084] S1a. Prepare the first deposition solution: first add the graphene powder into the methanol solution, and ultrasonicate for 30 minutes to form a uniformly dispersed graphene dispersion with a concentration of 1 mg / mL;

[0085] For every 100 μL of graphene dispersion, add 10 mL of HCl solution (0.08 M) in proportion to add HCl solution, and sonicate for 3 hours to form a uniform suspension;

[0086] Then take 10 mL of the above suspension and add 70 μL of aniline (analytical pure liquid aniline), sonicate for 30 min to obtain the first sedimentation solution;

[0087] S1b. Deposition of polyaniline / graphene composite layer: using a three-electrode system, using planar gold (conductive substrate) as the working electrode, commercial Ag / AgCl as the reference electrode, and platinum she...

Embodiment 2

[0092] This embodiment prepares a kind of composite electrode, the specific difference with embodiment 1 is:

[0093] (1) In step S1b, loop 20 times.

Embodiment 3

[0095] This embodiment prepares a kind of composite electrode, the specific difference with embodiment 1 is:

[0096] (1) In step S2b, the deposition potential is -0.3V, and the deposition time is 180s.

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Abstract

The invention discloses a composite electrode and a preparation method and application thereof, and belongs to the technical field of electrochemical biosensors. A composite electrode includes: a conductive substrate; a polyaniline/graphene composite layer; a polyaniline/graphene composite layer which coats the surface of the conductive substrate; and gold-platinum bimetallic nanoparticles, wherein gold-platinum bimetallic nanoparticles are deposited on the surface of the polyaniline/graphene composite layer. According to the composite electrode provided by the invention, through the synergistic effect of all the parts, the stability of the composite electrode and the detection sensitivity to hormones are improved, and dopamine, 5-hydroxytryptamine and melatonin can be detected at the same time.

Description

technical field [0001] The invention belongs to the technical field of electrochemical biosensors, and in particular relates to a compound electrode and its preparation method and application. Background technique [0002] With the development of society and the accelerated pace of life, people are under increasing pressure from all aspects. Coupled with the rapid development of mobile Internet products, people's sleep problems are becoming more and more serious, and they are becoming younger and more popular. [0003] The level of neurotransmitters and hormones determines the quality of sleep to a large extent. The neurotransmitters and hormones related to sleep are mainly dopamine, serotonin and melatonin. Poor sleep quality is likely to be due to abnormalities in the content of these three hormones, specifically: [0004] Dopamine (Dopamine), chemical formula C 8 h 11 NO 2 , is a kind of catechol neurotransmitter, which can regulate various physiological functions of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/327G01N27/30G01N27/38
CPCG01N27/3277G01N27/3278G01N27/308G01N27/38
Inventor 赵杰邓慧珍
Owner SOUTH CHINA UNIV OF TECH
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