Rare earth-doped cobalt phosphorus ternary alloy-modified nanometer porous copper flexible enzyme-free glucose sensing electrode and fabrication method thereof

A nanoporous copper and ternary alloy technology, which is applied to the electrochemical variables of materials, material analysis through electromagnetic means, instruments, etc., can solve the problems of inability to apply micro sensors, etc., to improve catalytic performance, slow down concentration polarization, The effect of enhancing the binding force

Active Publication Date: 2019-12-03
广州钰芯传感科技有限公司
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Problems solved by technology

[0010] This electrode solves the problem that the three-electrode system cannot be applied to microsensors, and the prepared interdigitated electrode can s...

Method used

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  • Rare earth-doped cobalt phosphorus ternary alloy-modified nanometer porous copper flexible enzyme-free glucose sensing electrode and fabrication method thereof
  • Rare earth-doped cobalt phosphorus ternary alloy-modified nanometer porous copper flexible enzyme-free glucose sensing electrode and fabrication method thereof
  • Rare earth-doped cobalt phosphorus ternary alloy-modified nanometer porous copper flexible enzyme-free glucose sensing electrode and fabrication method thereof

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preparation example Construction

[0059] A method for preparing a flexible non-enzyme glucose sensing electrode of rare earth-doped cobalt-phosphorus ternary alloy modified nanoporous copper, specifically comprising the following steps:

[0060] (1) Platinum plating on the counter electrode of the standard integrated three electrodes;

[0061] (2) modify silver-silver chloride on the reference electrode of the standard integrated three electrodes;

[0062] (3) Electrodeposit a copper layer on the working electrode of the standard integrated three electrodes;

[0063] (4) Gold-tin alloy is electrodeposited on the front of the working electrode, and then metal tin is removed to obtain an electrode modified with nanoporous copper;

[0064] (5) A ternary alloy compound or a cobalt phosphorus compound doped with rare earths and cobalt phosphorus is electrodeposited on the front of the working electrode to obtain a Co-M-P / NPC modified flexible non-enzyme glucose sensing electrode.

[0065] Further, in step (1), th...

Embodiment 1

[0074] M = blank, preparation of Co-M-P / NPC composite electrode:

[0075] (1) The counter electrode of the standard integrated three-electrode is connected separately, and the standard platinum electrode is used as the counter electrode, so that it is electrodeposited at the potential of -0.4V for 15 minutes, and the platinum plating solution is composed of H 2 PtCl 6 1 mM and KCl 0.1M.

[0076] (2) Connect the reference electrode of the standard integrated three-electrode separately, and use the silver wire electrode as the counter electrode to make it work at 25°C with a current density of 0.3A / dm 2 The silver plating-silver chloride solution is composed of: silver nitrate 40g / L, sodium thiosulfate 200g / L, potassium metabisulfite 40g / L, ammonium acetate 20g / L, thiosemicarbazide 0.6g / L.

[0077] (3) Wash, degrease, and wash the standard integrated three-electrode modified counter electrode and reference electrode, and then connect the working electrode separately, use it ...

Embodiment 2

[0084] Preparation of M=La, Co-M-P / NPC composite electrode:

[0085] (1) The counter electrode of the standard integrated three-electrode is connected separately, and the standard platinum electrode is used as the counter electrode, so that it is electrodeposited at the potential of -0.4V for 15 minutes, and the platinum plating solution is composed of H 2 PtCl 6 1 mM and KCl 0.1M.

[0086] (2) Connect the reference electrode of the standard integrated three-electrode separately, and use the silver wire electrode as the counter electrode to make it work at 25°C with a current density of 0.3A / dm 2 The silver plating-silver chloride solution is composed of: silver nitrate 40g / L, sodium thiosulfate 200g / L, potassium metabisulfite 40g / L, ammonium acetate 20g / L, thiosemicarbazide 0.6g / L.

[0087] (3) Wash, degrease, and wash the standard integrated three-electrode modified counter electrode and reference electrode, and then connect the working electrode separately, use it as th...

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Abstract

The invention provides a rare earth-doped cobalt phosphorus ternary alloy-modified nanometer porous copper flexible enzyme-free glucose sensing electrode. A Co-M-P/NPC composite structure is modifiedon a surface of the electrode, wherein M can be one of non-radioactive rear-earth elements or a blank, so that the electrode has extremely high electrochemical activity area and relatively low chargetransfer resistance, and the electrocatalytic activity of the electrode is substantially improved by the porous structure and an active substance. The Co-M-P/NPC composite electrode provided by the invention has relatively high sensitivity, extremely low detection limit, relatively low detection limit, favorable stability and interference-resistant performance, the sensitivity of the electrode is1,920 microA/mM.cm<2> within a detection range being 0.5-10.0mA, the detection limit is 182nM, the response time is smaller than 4 second, and the Co-M-P/NPC composite electrode can be used for actualdetection of human body blood glucose.

Description

technical field [0001] The invention belongs to the field of sensors for glucose detection, and relates to a preparation method of a flexible sensing electrode for detecting glucose without enzymes, in particular to the application of the sensing electrode in rapid glucose detection. Background technique [0002] Glucose circulates in the human body in the form of blood sugar. Appropriate blood sugar levels can help improve memory and cognitive performance. Too low blood sugar levels can lead to symptoms such as hypoglycemia or insulin shock. Too high blood sugar levels can lead to obesity or diabetes. Diabetes is one of the most common diseases in the world. In recent decades, the incidence of diabetes has been increasing, and it has been listed as one of the four major non-communicable diseases. Diabetes is a chronic disease that can cause various complications such as vision loss, renal failure, retinopathy, and stroke. The effective detection and treatment of diabetes h...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/327
CPCG01N27/30G01N27/3278
Inventor 奚亚男胡淑锦
Owner 广州钰芯传感科技有限公司
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