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Preparation method of copper oxidechemically modified electrode for detecting glucose

A technology of chemical modification and copper oxide, applied in electrochemical variables of materials, measuring devices, scientific instruments, etc., can solve the problems of poor consistency of quality and performance, complicated operation, easy environmental pollution, etc., and achieve strong vertical charge transfer. Ability, mild process conditions, the effect of avoiding secondary pollution

Inactive Publication Date: 2017-06-27
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above-mentioned hydrothermal method for preparing copper oxide needs to use sodium dodecylbenzenesulfonate, polyethylene glycol, etc. as soft templates in the preparation process to control the shape and size of copper oxide; The consistency of quality and performance is poor; strong bases such as NaOH are needed to adjust the pH value of the reaction process during the preparation, which is easy to pollute the environment

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  • Preparation method of copper oxidechemically modified electrode for detecting glucose
  • Preparation method of copper oxidechemically modified electrode for detecting glucose
  • Preparation method of copper oxidechemically modified electrode for detecting glucose

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Embodiment 1

[0038] A preparation method for a copper oxide chemically modified electrode for detecting glucose, the steps of which are:

[0039] A. Adding Cu(NO 3 ) 2 Prepare 1.0mol / L of Cu(NO 3 ) 2 solution, prepare urea into 1.0mol / L urea solution; then Cu(NO 3 ) 2 The solution is slowly added dropwise to the urea solution, and then stirred for 20 minutes to obtain a mixed solution; the molar ratio of copper salt to urea in the mixed solution is 3:2;

[0040] B. Pour the mixed solution obtained in step A into a hydrothermal reaction kettle, and perform a hydrothermal reaction at a temperature of 130° C. for 5 hours; then suction filter to obtain a solid product, then wash and dry;

[0041] C. Put the solid product of step B into a muffle furnace, calcine and decompose, then cool down naturally, and grind to obtain copper oxide powder;

[0042] In this example, the heating rate of the calcination decomposition is 5° C. / min, the calcination temperature is 450° C., and the calcinatio...

Embodiment 2

[0053] A preparation method for a copper oxide chemically modified electrode for detecting glucose, the steps of which are:

[0054] A. Add CuSO 4 Prepare 1.0mol / L CuSO 4 solution, the urea was formulated into 8mol / L urea solution; then the CuSO 4 The solution is slowly added dropwise to the urea solution, and then stirred for 60 minutes to obtain a mixed solution; the molar ratio of copper salt to urea in the mixed solution is 3:2;

[0055] B. Pour the mixed solution obtained in step A into a hydrothermal reaction kettle, and perform a hydrothermal reaction at a temperature of 200° C. for 0.5 hours; then suction filter to obtain a solid product, then wash and dry;

[0056] C. Put the solid product of step B into a muffle furnace, calcine and decompose, then cool down naturally, and grind to obtain copper oxide powder;

[0057] In this example, the heating rate of the calcination decomposition is 1° C. / min, the calcination temperature is 220° C., and the calcination time is...

Embodiment 3

[0062] A preparation method for a copper oxide chemically modified electrode for detecting glucose, the steps of which are:

[0063] A. CuCl 2 Prepare 1.5mol / L CuCl 2 Solution, prepare urea into 0.1mol / L urea solution; then CuCl 2 The solution is slowly added dropwise to the urea solution, and then stirred for 5 minutes to obtain a mixed solution; the molar ratio of copper salt to urea in the mixed solution is 3:2;

[0064] B. Pour the mixed solution obtained in step A into a hydrothermal reaction kettle, and perform a hydrothermal reaction at a temperature of 100° C. for 12 hours; then suction filter to obtain a solid product, then wash and dry;

[0065] C. Put the solid product of step B into a muffle furnace, calcine and decompose, then cool down naturally, and grind to obtain copper oxide powder;

[0066] In this example, the heating rate of the calcination decomposition is 20° C. / min, the calcination temperature is 600° C., and the calcination time is 0.5 hour.

[006...

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Abstract

Provided is a preparation method of a copper oxidechemically modified electrode for detecting glucose. The method comprises the main steps that according to the mass ratio of copper ions to urea 3:2, a copper salt solution is slowly and dropwise added to the urea solution to generate a cupper ion complex having high coordination number; then, the complex is put in a hydrothermal reaction kettle to perform hydrothermal reaction, and a copper oxide precursor is prepared; the precursor is decomposed into rice-shaped copper oxide at high temperature; then the copper oxide is matched with a Nafion solution to obtain a rice-shaped copper oxide modifying solution; finally the solution is dropwise added to the surface of the solid electrode to obtain the rice-shaped copper oxidechemically modified electrode. The preparation method is simple in operation, a template agent and template are omitted, and the copper oxide having a unique rice-shaped structure can be obtained. The prepared chemically modified electrode has the good electrochemical responsiveness to glucose, low detection limit (0.000075 mM), a wide detection range (0.001-2.361mM) and high sensitivity (2.376Ma.mM-1.cm-2).

Description

technical field [0001] The invention relates to a preparation method of a copper oxide chemically modified electrode for detecting glucose. Background technique [0002] According to relevant data from the International Diabetes Federation (IDF), the number of diabetic patients in the world will reach 3.66 billion in 2030, which has become a world public health problem. Rapid and accurate detection of glucose is of great significance for the prevention and treatment of diabetes. At present, the commonly used glucose sensor is a copper oxide chemically modified electrode glucose sensor. Its main composition and principle are: a three-electrode system is formed in the solution, in which the copper oxide modified electrode is used as the working electrode, the saturated calomel electrode is used as the reference electrode, and the platinum electrode is used as the reference electrode. As a counter electrode; during the detection process, CuO on the copper oxide modified electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48G01N27/30
CPCG01N27/48G01N27/308
Inventor 江奇邓敏卢晓英
Owner SOUTHWEST JIAOTONG UNIV
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