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Dopamine electrochemical sensing electrode based on double-metal nanoparticle doped vanadium-containing heteropoly acid/carbon nanotubes

A bimetallic nano and carbon nanotube technology, applied in the direction of material electrochemical variables, can solve the problems of high cost and limitation of Pt nanoparticles, and achieve the effects of fast detection speed, low detection limit and wide linear range

Inactive Publication Date: 2017-05-31
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Pt nanoparticles are expensive, which greatly limits its application. As a new metal catalyst, Pd has the same catalytic activity as Pt, but its price is much cheaper than Pt.

Method used

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  • Dopamine electrochemical sensing electrode based on double-metal nanoparticle doped vanadium-containing heteropoly acid/carbon nanotubes
  • Dopamine electrochemical sensing electrode based on double-metal nanoparticle doped vanadium-containing heteropoly acid/carbon nanotubes
  • Dopamine electrochemical sensing electrode based on double-metal nanoparticle doped vanadium-containing heteropoly acid/carbon nanotubes

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specific Embodiment approach 1

[0067] Specific embodiment one: This embodiment is a dopamine electrochemical sensing electrode based on bimetallic nanoparticle-doped vanadium-containing heteropolyacid / carbon nanotubes, which consists of ITO electrodes, polyethyleneimine layers, and loaded bimetallic nanoparticles. The vanadium-containing heteropolyacid layer and carbon nanotube layer are prepared; polyethyleneimine layer / vanadium-containing heteropolyacid layer loaded with bimetallic nanoparticles / polyethyleneimine layer / carbon nanotube layer is a cycle unit , the cycle unit is cycled n times to obtain a dopamine electrochemical sensing electrode based on bimetallic nanoparticle-doped vanadium-containing heteropolyacid / carbon nanotubes, wherein n is an integer of 1-6.

[0068] The beneficial effect of this implementation mode:

[0069] Compared with the traditional dopamine sensor, the dopamine electrochemical sensing electrode based on bimetallic nanoparticle-doped vanadium-containing heteropolyacid / carbon...

specific Embodiment approach 2

[0071] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the thickness of the dopamine electrochemical sensing electrode based on the vanadium-containing heteropolyacid / carbon nanotube doped with bimetallic nanoparticles is 1.2 μm~ 2 μm. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0072] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the vanadium-containing heteropolyacid layer loaded with bimetallic nanoparticles is made of a Keggin-type layer doped with palladium-platinum alloy nanoparticles. PMo 9 V 3 obtained after the solution is dried; the palladium-platinum alloy nanoparticles are spherical nanoparticles with a particle diameter of 5nm-8nm. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a dopamine electrochemical sensing electrode based on double-metal nanoparticle doped vanadium-containing heteropoly acid / carbon nanotubes, belongs to the technical field of electrochemical sensors and particularly relates to the dopamine electrochemical sensing electrode, aiming at solving the problems of an existing electrochemical sensor for detecting dopamine that the linear range is narrow, the detection limit is high and the responding time is slow. The dopamine electrochemical sensing electrode based on the double-metal nanoparticle doped vanadium-containing heteropoly acid / carbon nanotubes is prepared from an ITO (Indium Tin Oxide) electrode, a polyethyleneimine layer and a double-metal nanoparticle doped vanadium-containing heteropoly acid layer and a carbon nanotube layer; a polyethyleneimine layer / double-metal nanoparticle doped vanadium-containing heteropoly acid layer / polyethyleneimine layer / carbon nanotube layer is used as a circulating unit; and the circulating unit is circulated for n times. The dopamine electrochemical sensing electrode based on the double-metal nanoparticle doped vanadium-containing heteropoly acid / carbon nanotubes can be obtained by the invention.

Description

technical field [0001] The invention belongs to the technical field of electrochemical sensors, in particular to dopamine electrochemical sensing electrodes. Background technique [0002] Dopamine is a very important substance in the central nervous system of mammals. The abnormal concentration of dopamine in the human brain can cause serious diseases such as schizophrenia. Therefore, it is of great practical significance to study sensitive, fast and simple dopamine detection methods . At present, the common methods for detecting dopamine include high performance liquid chromatography, fluorescence spectrometry, chemiluminescence and capillary electrophoresis, but they have some defects, such as complicated sample pretreatment, cumbersome detection process, expensive instruments and the need for dedicated personnel. personnel to operate. Therefore, it is of great significance to develop a low-cost, simple-to-operate and high-sensitivity analytical method for dopamine. Com...

Claims

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Application Information

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IPC IPC(8): G01N27/30
CPCG01N27/30
Inventor 马慧媛焦佳庞海军王新铭谭立超
Owner HARBIN UNIV OF SCI & TECH
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