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Preparation and application of dopamine sensor based on nickel oxide-carbon nanotubes

A technology of carbon nanotubes and nickel oxide, which is applied in the field of electrochemical detection, can solve the problems of poor reproducibility, achieve strong practicability, simple preparation method, and improve the effect of catalytic oxidation

Active Publication Date: 2018-03-02
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of selectivity and poor reproducibility of existing modified electrodes, the present invention provides a method for preparing a modified electrode based on nickel oxide-carbon nanotube composite material with simple method, high speed and low cost.

Method used

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  • Preparation and application of dopamine sensor based on nickel oxide-carbon nanotubes
  • Preparation and application of dopamine sensor based on nickel oxide-carbon nanotubes
  • Preparation and application of dopamine sensor based on nickel oxide-carbon nanotubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1. Firstly, 8 mg of carbon nanotubes were dispersed in 4 mL of absolute ethanol, and then treated by sonication for about 5 minutes. The processed samples were coated on a circular silicon substrate by spin coating, and dried at room temperature. Adjust the reaction temperature of the atomic layer deposition equipment to 140° C., and then put the silicon wafer into the reaction chamber of the atomic layer deposition equipment for heating. The first precursor O 3 Pass it into the reaction chamber of the atomic layer deposition equipment for pulse reaction. The temperature of the reaction chamber is set at 140°C, the pulse reaction is 1s, and the exposure is 10s. In the chamber of the layer deposition equipment, the temperature of the nickelocene precursor raw material bottle is set at 80°C for 1 second of reaction and 10 seconds of exposure. After the reaction is completed, nitrogen is purged for 2 seconds, and then oxygen source O is introduced. 3 , pulse for 1 s, and ...

Embodiment 2

[0062] 1. Firstly, 16 mg of carbon nanotubes were dispersed in 4 mL of absolute ethanol, and then treated by sonication for about 10 minutes. The treated samples were coated on a circular silicon substrate by spin coating, and dried at room temperature. Adjust the reaction temperature of the atomic layer deposition equipment to 180° C., and then put the silicon wafer into the reaction chamber of the atomic layer deposition equipment for heating. The first precursor O 3 Pass it into the reaction chamber of the atomic layer deposition equipment for pulse reaction. The temperature of the reaction chamber is set at 180°C, the pulse reaction is 1s, and the exposure is 6s. After the reaction is completed, nitrogen is purged for 5s, and then the precursor nickelocene is passed into the atom In the chamber of the layer deposition equipment, the temperature of the nickelocene precursor raw material bottle is set at 100°C for 2 seconds of reaction and 8 seconds of exposure. After the re...

Embodiment 3

[0066] 1. Firstly, 24 mg of carbon nanotubes were dispersed in 4 mL of absolute ethanol, and then treated by sonication for about 8 minutes. The treated samples were coated on a circular silicon substrate by spin coating, and dried at room temperature. Adjust the reaction temperature of the atomic layer deposition equipment to 200°C, and then put the silicon wafer into the reaction chamber of the atomic layer deposition equipment for heating. The first precursor O 3 Pass it into the reaction chamber of the atomic layer deposition equipment for pulse reaction. The temperature of the reaction chamber is set at 200°C, the pulse reaction is 2s, and the exposure is 5s. In the chamber of the layer deposition equipment, the temperature of the nickelocene precursor raw material bottle is set at 60°C for 2 seconds, and the exposure is 10 seconds. After the reaction is completed, the nitrogen gas is purged for 8 seconds, and then the oxygen source O is introduced. 3 , pulsed for 2s, ex...

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Abstract

The invention provides a method for preparing nickel oxide-carbon nano-tube composite materials and application thereof. The nickel oxide-carbon nano-tube composite materials are used for modifying electrodes. The prepared modified electrodes can be used for selectively detecting biological small-molecular substances such as dopamine and uric acid. The method and the application have the advantages that the modified electrodes are high in selectivity and repeatability and good in stability; the sizes of the composite materials prepared by the aid of processes for depositing atomic layers can be accurately controlled, and the method for synthesizing the nickel oxide-carbon nano-tube composite materials is simple and convenient and is free of pollution; nickel oxide nano-particles in the composite materials are uniformly distributed on the walls of carbon nano-tubes, the dopamine catalytic performance can be greatly enhanced under the synergistic effects of the carbon nano-tubes and nickel oxide, and the dopamine detection sensitivity can be improved; the method has broad application prospect in the aspect of dopamine quantitative detection; the method includes simple step and is convenient to implement and high in practicality.

Description

technical field [0001] The invention belongs to the field of electrochemical detection, in particular to the preparation and application of a dopamine sensor based on nickel oxide-carbon nanotubes. Background technique [0002] Dopamine (DA) is a neurotransmitter, a chemical used to help cells transmit impulses. This brain secretion is primarily responsible for the brain's lust and sensations and plays an important role in the regulation of the nervous system. Insufficient dopamine content in the human body will cause people to lose the ability to control muscles, and in severe cases, it will cause involuntary vibration of people's hands and feet, and even lead to Parkinson's syndrome. Therefore, the detection of dopamine content is of great significance in medicine and clinical aspects. [0003] The detection methods of dopamine mainly include: fluorescence method, chromatography method, spectrophotometry method, electrochemical method and capillary electrophoresis method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48G01N27/30
CPCG01N27/308G01N27/48
Inventor 王宗花赵露张立学徐显朕
Owner QINGDAO UNIV
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