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Preparation method of Pt-Ni alloy nano tube array electrode and application for enzyme-free glucose sensor

A technology of alloy nano-array electrodes, which is applied in the preparation of Pt-Ni alloy nanotube array electrodes and the application field of enzyme-free glucose sensors, can solve the problems of high cost of experimental materials, complicated operation, high equipment requirements, etc., to improve sensitivity, Obvious catalytic effect, good linear range effect

Inactive Publication Date: 2015-07-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods have the disadvantages of high equipment requirements, high cost of experimental materials, and complicated operations.
However, the method of using the current displacement method to prepare a three-dimensional array has not been reported yet.

Method used

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  • Preparation method of Pt-Ni alloy nano tube array electrode and application for enzyme-free glucose sensor
  • Preparation method of Pt-Ni alloy nano tube array electrode and application for enzyme-free glucose sensor
  • Preparation method of Pt-Ni alloy nano tube array electrode and application for enzyme-free glucose sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Before using the Au electrode (diameter 4mm), use 1.0 μm, 0.3 μm and 0.05 μm alumina powder to polish the surface of the electrode in a figure-eight shape on the suede, and then use deionized water and ethanol to repeatedly ultrasonically clean it for 5 times until the electrode surface is The mirror surface is smooth, and then in 0.1M phosphate buffer solution with pH=6.86, the scanning voltage window is -0.3-0.8V, and the cyclic voltammetry scans for 10 cycles until the scanning curve is stable. The AAO template with a pore size of 200nm is sprayed with gold on one side before use as an electrodeposited conductive layer, and a drop of conductive silver glue is dripped on the surface of the Au electrode. After the conductive silver glue is evenly spread, quickly fix the gold sprayed side of the AAO template on the On the surface of the Au electrode, use insulating silicone rubber to fix the edge of the AAO template, leave the AAO template with the size of the Au electro...

Embodiment 2

[0047] Before using the Au electrode (4mm in diameter), polish the surface of the electrode with polished flannelette, and then use deionized water and ethanol to repeatedly ultrasonically clean it 3 times until the surface of the electrode is mirror-smooth. 15 laps until the scanning curve is stable. Spray gold on one side of the AAO template before use, and drop a drop of conductive silver glue on the surface of the Au electrode. After spreading the conductive silver glue evenly, quickly fix the gold-sprayed side of the AAO template on the surface of the Au electrode, and use insulating silicone rubber to fix it. On the edge of the AAO template, leave an AAO template the size of the Au electrode area, and let it dry for 24 hours.

[0048] Ni nanowire arrays were prepared by galvanostatic deposition using an electrochemical workstation, using a three-electrode system, Au electrodes with fixed AAO templates as working electrodes, Pt wire electrodes (1 mm in diameter) as auxili...

Embodiment 3

[0051] Use 1.0 μm, 0.3 μm and 0.05 μm alumina powder to polish the surface of the Au electrode on the suede for 10 min, then use deionized water and ethanol to repeatedly ultrasonically clean it 5 times until the surface of the electrode is mirror-smooth. Cyclic voltammetry was carried out for 15 cycles in phosphate buffered saline until the scanning curve was reproducible. Apply a drop of conductive silver glue on the surface of the Au electrode, spread the conductive silver glue evenly, and quickly fix the gold-sprayed side of the AAO template on the surface of the Au electrode, use insulating silicone rubber to fix the edge of the AAO template, and leave a gap of the size of the Au electrode. AAO templates were left at room temperature for one day to dry naturally.

[0052] Ni nanowire arrays were prepared by galvanostatic deposition using an electrochemical workstation, using a three-electrode system, Au electrodes with fixed AAO templates as working electrodes, Pt wire el...

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Abstract

The invention relates to a preparation method of a Pt-Ni alloy nano tube array electrode and an application for an enzyme-free glucose sensor. A Ni nano wire array acts as a template, and the Pt-Ni alloy nano tube array electrode is prepared by adopting a current displacement method. The preparation method comprises the following steps: carrying out metal spraying treatment on one surface of a porous template comprising an AAO template and a PC template, fixing conductive silver glue on the surface of the electrode, and sealing the circumference of the template with insulation rubber; carrying out electric deposition in the porous template so as to prepare a Ni nano wire, and then removing the template so as to obtain the Ni nano wire array electrode; and preparing the Pt-Ni alloy nano tube array electrode by adopting a current displacement method, wherein a precursor solution is chloroplatinic acid or potassium chloroplatinate. The Pt-Ni alloy nano tube array electrode can be applied to an enzyme-free glucose sensor. The linear response range of the enzyme-free glucose sensor to glucose is 1-9Mm, and the detection sensitivity is 57.87micron AmM-1.

Description

technical field [0001] The invention belongs to electrode material technology, in particular to a preparation method of a Pt-Ni alloy nanotube array electrode and its application in an enzyme-free glucose sensor. Background technique [0002] Diabetes is a common disease. Diabetes can lead to various diseases, including heart disease, kidney failure and blindness. These complications can be monitored through strict control of blood sugar concentration. This is so important that blood glucose testing is one of the most common analyses. Therefore, there is a great market demand for simple and fast glucose sensors. Among the many glucose sensors, the electrochemical amperometric glucose sensor has been widely studied due to its simplicity, speed, and high sensitivity. [0003] In the past few decades, the research on glucose enzyme sensors has made great achievements. However, due to the inherent biological characteristics of enzymes, enzymes are easily affected by the environ...

Claims

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Application Information

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IPC IPC(8): G01N27/30
Inventor 许鑫华孙艳丽杨红艳孟浩文俞晓辉
Owner TIANJIN UNIV
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