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Preparation and application of au NPs/ZnO nanocone array/graphene foam electrode

A foamed graphene, zinc oxide nanotechnology, applied in graphene, nanocarbon, nanotechnology and other directions, can solve the problems of poor selectivity and low sensitivity, and achieve the effects of uniform size, excellent electrical conductivity and simple experimental operation.

Inactive Publication Date: 2020-10-27
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is to give full play to the synergistic effect of gold nanoparticles, zinc oxide nanocone arrays and foamed graphene, and overcome the problems of low sensitivity and poor selectivity of traditional electrodes for detecting DA

Method used

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  • Preparation and application of au NPs/ZnO nanocone array/graphene foam electrode
  • Preparation and application of au NPs/ZnO nanocone array/graphene foam electrode
  • Preparation and application of au NPs/ZnO nanocone array/graphene foam electrode

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Experimental program
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specific Embodiment approach 1

[0032] Specific embodiment one: the preparation method of a kind of gold nanoparticle / zinc oxide nanocone array / foamed graphene electrode in the present embodiment is specifically carried out according to the following steps:

[0033] 1. Preparation of foamed graphene by chemical vapor deposition

[0034] 1) Use nickel foam as a template, place it in the center of a quartz tube furnace, and heat it from room temperature at a heating rate of 8-15°C / min to a temperature of 800°C~1000°C under the protection of argon and hydrogen. Under the condition of 800°C~1000°C, feed methane gas into the tube furnace at a flow rate of 10sccm~30sccm for 10min~20min, and then cool the quartz tube furnace at a cooling rate of 120°C / min~160°C / min from the temperature to Cool to room temperature at 800°C~1000°C. At this time, the surface of the nickel foam template is covered with graphene; when the temperature in step 1 1) rises to 500°C, turn on the water cooling cycle;

[0035] 2) Dissolve pol...

specific Embodiment approach 2

[0047] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: in step 1 1), feed methane gas into the tube furnace at a flow rate of 10 sccm ~ 30 sccm for 15 min ~ 18 min, and the others are the same as specific embodiment 1;

specific Embodiment approach 3

[0048] Specific embodiment 3: The difference between this embodiment and one of specific embodiments 1 to 2 is that in step 2 1), use an electronic balance to weigh 0.01g~0.03g of zinc acetate and dissolve it in 9mL~12mL of methanol solution to form a seed layer Solution, others are identical with one of specific embodiment one or two;

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Abstract

The invention relates to preparation of a gold nanoparticle (Au NPs) / zinc oxide nanocone array / foamed graphene electrode, electrochemical detection of dopamine and aims to solve the problems of low sensitivity and poor selectivity when the existing material is used for detecting the dopamine. The preparation of the electrode mainly comprises the following steps: step one, preparing foamed graphene(GF) through a chemical vapor deposition method; step two, growing a zinc oxide nanocone array on the surface of the foamed graphene through a hydrothermal process to prepare ZnO NCAs / GF; and step three, preparing a gold nanoparticle / ZnO NCAs / GF electrode through a dropwise coating process. The prepared gold nanoparticle / zinc oxide nanocone array / foamed graphene electrode has the advantages of large specific surface area, high conductivity, multiple active sites and excellent electrocatalytic property and can be used as an electrode material for detecting the dopamine.

Description

technical field [0001] The invention relates to the preparation of a gold nanoparticle / zinc oxide nanocone array / foamed graphene electrode and electrochemical detection of dopamine. Background technique [0002] Dopamine (DA), as an important neurotransmitter, plays an important role in the central nervous system, kidney and endocrine system. Insufficient or imbalanced dopamine can cause people to lose the ability to control muscles or cause inability to concentrate. In severe cases, it can lead to involuntary tremors of hands and feet, and even suffer from Parkinson's disease and Alzheimer's disease. The content of dopamine in the human body is very low, and the content of uric acid is high, and uric acid (UA) and dopamine coexist in the human body. In the traditional electrode test, the oxidation peaks of these two substances are very close and the sensitivity is not high. Therefore, it is of great practical significance to develop an electrode that can accurately detect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30C01B32/186C01B32/194C23C18/12B22F9/24B82Y40/00B82Y30/00
CPCB22F9/24B82Y30/00B82Y40/00C23C18/1216C01B32/186C01B32/194G01N27/30
Inventor 岳红彦卢欣欣张宏杰高鑫宋姗姗郭鑫睿张腾王渊博
Owner HARBIN UNIV OF SCI & TECH
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