Au@Pt core-shell structure nano electrode, preparing method and application of Au@Pt core-shell structure nano electrode

A nano-electrode, core-shell structure technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve the effect of simple method, wide detection range and excellent electrode properties

Inactive Publication Date: 2017-10-24
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there are many studies on the fabrication and electrochemistry of nano-electrodes, most of them are in their infancy and further research is needed.

Method used

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  • Au@Pt core-shell structure nano electrode, preparing method and application of Au@Pt core-shell structure nano electrode
  • Au@Pt core-shell structure nano electrode, preparing method and application of Au@Pt core-shell structure nano electrode
  • Au@Pt core-shell structure nano electrode, preparing method and application of Au@Pt core-shell structure nano electrode

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Embodiment 1

[0057] A method for preparing an Au@Pt core-shell structure nano-electrode, comprising the following steps:

[0058] 1) Preparation of gold nanodisk electrodes:

[0059] a. Encapsulate a gold wire with a diameter of 25 μm and a length of 1-3 cm in a capillary with a length of 7-10 cm, and then draw it with a P-2000 laser drawing machine. In order to prevent the capillary and gold wire from being fused, the determined heating parameters are: The heating temperature is 400-460°C, four heating cycles, each cycle is heated for 15-25s, cooled for 35-45s, and always kept in a vacuum state;

[0060] b. The melted capillary / gold wire, heating temperature 400-460°C, pulling force 130-150N, speed 45-55m / s, the drawn nano-electrodes are observed with an OLYMPUS biological microscope until the tip diameter of the probe is less than 100 nanometers ;

[0061] c. Connect gold wire and tungsten wire (diameter 180 μm) with silver conductive glue as the conductive contact surface, put the dra...

Embodiment 2

[0070] An application of an Au@Pt core-shell structure nano-electrode to catalyze the oxidation-reduction reaction of hydrogen peroxide, and the application of detecting the concentration of hydrogen peroxide by catalyzing the oxidation-reduction reaction of hydrogen peroxide, specifically:

[0071] The Au@Pt core-shell nanoelectrode was placed in 5 mL of 0.1 M PBS (pH=7), and the potential was set to 0.15 V by chronoamperometry, and 50 μL of 40 μM hydrogen peroxide solution was added sequentially (50 μL of 40 μM hydrogen peroxide solution was added in turn). Hydrogen peroxide solution, add 50 μL of 40 μM hydrogen peroxide solution after the current signal is stable), as the hydrogen peroxide concentration increases, the response current increases significantly, and the linear relationship between the hydrogen peroxide concentration and the current signal is constructed; Under the same conditions, the current signal of the hydrogen peroxide solution was detected, and its concen...

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Abstract

The invention provides an Au@Pt core-shell structure nano electrode, a preparing method and application of the Au@Pt core-shell structure nano electrode. Compared with the prior art, the method for preparing a gold nano disk electrode is simple, the size can be controlled within the nano scale range, and the method can be used for preparing the gold nano disk electrode and is similarly applicable to nano disk electrodes of other metals. Meanwhile, about the technology for preparing the gold nano disk electrode, the Au@Pt core-shell structure nano electrode is obtained through etching and under potential deposition, very good electro-catalysis activity is achieved for hydrogen peroxide, the prepared Au@Pt core-shell structure nano electrode has very good response to the redox reaction for hydrogen peroxide catalysis, the current is obviously increased along with increasing of the concentration of hydrogen peroxide, and a linear relation between hydrogen peroxide concentration and current signals is constructed; and accordingly the concentration of the hydrogen peroxide solution is detected.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to an Au@Pt core-shell structure nano electrode, a preparation method and an application thereof. Background technique [0002] With the development and updating of science and technology and equipment, the development of nano-electrodes is getting faster and faster. Using new instruments and operating methods, we can prepare and characterize electrodes with smaller sizes. Nanoelectrodes generally refer to electrodes with a size less than 100nm. Due to the critical size of nanoelectrodes (such as: the radius of nanodisk electrodes, the radius and depth of nanopore electrodes, the length of nanowire electrodes, the width of nanoribbon electrodes, etc.) and the size of molecules Therefore, nanoelectrodes are developing rapidly in the field of molecular research. Although there are many studies on the fabrication and electrochemistry of nanoelectrodes, most of them are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/30B22F1/02G01N27/30G01N27/327G01N27/48B82Y30/00B82Y40/00
CPCG01N27/30G01N27/3277G01N27/3278G01N27/48C23F1/30B82Y30/00B82Y40/00B22F1/054B22F1/17
Inventor 李永新钱媛媛刘勇
Owner ANHUI NORMAL UNIV
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