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NiO/Au nanotube array flexible electrode with core-shell structure and application of NiO/Au nanotube array flexible electrode

A nanotube array, core-shell structure technology, applied in the field of enzyme-free glucose detection, can solve the problems of difficulty in meeting daily application requirements, poor stability, and high price, and achieve the effects of improving glucose sensing performance, controllable size, and low price.

Active Publication Date: 2021-07-27
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Glucose sensing electrodes mainly include enzyme-containing electrodes and enzyme-free electrodes, and enzyme-containing electrodes are difficult to meet the daily application due to the disadvantages of poor stability, high price, and the loaded enzyme is easily interfered by temperature, humidity, pH and other molecules. need

Method used

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  • NiO/Au nanotube array flexible electrode with core-shell structure and application of NiO/Au nanotube array flexible electrode
  • NiO/Au nanotube array flexible electrode with core-shell structure and application of NiO/Au nanotube array flexible electrode
  • NiO/Au nanotube array flexible electrode with core-shell structure and application of NiO/Au nanotube array flexible electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) First use cyclic voltammetry to test the carbon cloth in H 2 SO 4 Processing in solution, voltage scanning range -1.2V-1.2V, scanning rate 0.1V / S. The treated carbon cloth was then treated with 1mM ZnCl 2 The ZnO nanorod array template was prepared by a two-step constant voltage electrodeposition method in the electrolyte, the deposition temperature was 80°C, the first step deposition potential was -1.3V, and the time was 0.5S, and the second step potential was -1.0V, and the time was 3600S.

[0035] (2) The above-mentioned carbon cloth deposited with ZnO nanorod array template was mixed with 10mM HAuCl 4 H 3 BO 3 A voltage of -0.2V was applied to the solution, and electrodeposition was carried out at room temperature for 30s.

[0036] (3) The above carbon paper containing 0.5M Ni(NO 3 ) 2 H 3 BO 3 The solution was deposited under a voltage of -0.9V for 60s.

[0037](4) Calcining the above materials at 350°C for 2h. Finally, the material was soaked in 6M ...

Embodiment 2

[0039] (1) First use cyclic voltammetry to test the carbon cloth in H 2 SO 4 Processing in solution, voltage scanning range -1.2V-1.2V, scanning rate 0.1V / S. The treated carbon cloth was then treated with 2mM ZnSO 4 The ZnO nanorod array template was prepared by a two-step constant voltage electrodeposition method in the electrolyte, the deposition temperature was 70°C, the first step deposition potential was -1.4V, and the time was 3S, and the second step potential was -0.6V, and the time was 4000S.

[0040] (2) The above-mentioned carbon cloth deposited with ZnO nanorod array template was mixed with 5mM HAuCl 4 H 3 BO 3 A voltage of -0.1V was applied to the solution, and electrodeposition was carried out at room temperature for 50s.

[0041] (3) The above carbon paper containing 0.3M NiCl 2 H 3 BO 3 The solution was deposited under the voltage of -1.1V for 20s.

[0042] (4) The above materials were calcined at 300°C for 4h. Finally, the material was soaked in 5M Na...

Embodiment 3

[0044] (1) First use cyclic voltammetry to test the carbon cloth in H 2 SO 4 Processing in solution, voltage scanning range -1.2V-1.2V, scanning rate 0.1V / S. Then the treated carbon cloth was mixed with 3mM Zn(NO 3 ) 2 The ZnO nanorod array template was prepared by a two-step constant voltage electrodeposition method in the electrolyte, the deposition temperature was 100°C, the deposition potential of the first step was -1.2V, and the time was 0.3S, and the potential of the second step was -1.1V, and the time was 1000S.

[0045] (2) The above-mentioned carbon cloth deposited with ZnO nanorod array template was mixed with 20mM HAuCl 4 H 3 BO 3 A voltage of -0.4V was applied to the solution, and electrodeposition was performed at room temperature for 10s.

[0046] (3) The above carbon paper containing 0.8M NiSO 4 H 3 BO 3 The solution was deposited under a voltage of -0.8V for 120s.

[0047] (4) Calcining the above materials at 500°C for 0.5h. Finally, the material wa...

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Abstract

The invention discloses a NiO / Au nanotube array flexible electrode with a core-shell structure and application of the NiO / Au nanotube array flexible electrode. According to the NiO / Au nanotube array flexible electrode with the core-shell structure, an Au nanotube is arranged on an inner core layer, and a NiO nanotube is arranged on an outer shell layer. According to the invention, ZnO is used as a template for nanotube display, and a flexible NiO / Au nanotube array electrode with a core-shell structure is deposited on the surface of carbon cloth by adopting an electro-deposition method. According to the flexible NiO / Au nanotube array electrode with the core-shell structure prepared by the invention, the conductivity of NiO of the shell layer can be improved by using noble metal Au of the core layer, so that the glucose oxidation capability of the flexible NiO / Au nanotube array electrode is improved; the glucose sensing performance of the composite electrode can be obviously improved through the synergistic effect of Au and NiO on glucose oxidation; and in addition, the use of the noble metal Au can be greatly reduced by using the NiO, so that the production cost of the electrode is reduced.

Description

technical field [0001] The invention belongs to the field of enzyme-free glucose detection, in particular to a NiO / Au nanotube array flexible electrode with a core-shell structure and its application in an enzyme-free glucose sensor. Background technique [0002] Diabetes is one of the major diseases that threaten human life and health. According to statistics, there are about 450 million diagnosed diabetic patients in the world in 2017, and this number will increase to 690 million in 2045. Although there is no effective cure, close monitoring of blood sugar in people with diabetes can effectively prevent predisposing to the disease. Therefore, accurate, efficient and rapid blood glucose detection is particularly important for clinical diagnosis and personal prevention and control. Traditional glucose detection is mainly based on needle point blood collection and venous blood collection detection, and blood is collected by piercing the skin to detect the glucose level in t...

Claims

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Application Information

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IPC IPC(8): G01N27/327G01N27/49
CPCG01N27/3272G01N27/49
Inventor 殷好勇赵赫宇周杰林
Owner HANGZHOU DIANZI UNIV
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