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Preparation method and application of MnCo2O4/polyaniline composite-modified glassy carbon electrode

A glassy carbon electrode and polyaniline technology applied in the field of electrochemistry to achieve high sensitivity, convenient operation and improved catalytic effect

Active Publication Date: 2019-02-01
CHONGQING CHANGFENG CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modified electrode based on manganese cobaltate / polyaniline and the method of detecting quercetin using manganese cobaltate / polyaniline modified glassy carbon electrode have not been reported yet.

Method used

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  • Preparation method and application of MnCo2O4/polyaniline composite-modified glassy carbon electrode

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Glassy carbon electrode pretreatment: Polish the glassy carbon electrode with 0.3, 0.1, 0.05 μm alumina powder to the mirror surface in turn, and then ultrasonically clean it with ethanol and deionized water for 3 minutes respectively to obtain the pretreated glassy carbon electrode;

[0030] (2)MnCo 2 o 4 Preparation: CoCl 2 ·6H 2 O, MnCl 2 ·H 2 O, ammonium fluoride, and hexamethylenetetramine were dissolved in 100 mL of deionized water at a molar ratio of 1:1:4:10, ultrasonicated for 4 minutes to form a uniform solution, and then the solution was transferred to an autoclave, React at 100°C for 10 hours, cool to room temperature after the reaction is complete, filter the product, wash with acetone and deionized water respectively, dry in vacuum at 50°C for 8 hours, and calcinate the dried product at 300°C for 2 hours to obtain MnCo 2 o 4 nanoparticles; for the obtained MnCo 2 o 4 Electron microscopy analysis of the nanoparticles shows that they have a dendr...

Embodiment 2

[0034] (1) Glassy carbon electrode pretreatment: Polish the glassy carbon electrode with 0.3, 0.1, 0.05 μm alumina powder to the mirror surface in turn, and then ultrasonically clean it with ethanol and deionized water for 3 minutes respectively to obtain the pretreated glassy carbon electrode;

[0035] (2)MnCo 2 o 4 Preparation: CoCl 2 ·6H 2 O, MnCl 2 ·H 2 O, ammonium fluoride, and hexamethylenetetramine were dissolved in 100 mL of deionized water according to a molar ratio of 1:1:6:10, and ultrasonicated for 6 minutes to form a uniform solution, which was then transferred to an autoclave. React at 140°C for 14 hours, cool to room temperature after the reaction is complete, filter the product, wash with acetone and deionized water respectively, dry in vacuum at 50°C for 8 hours, and calcinate the dried product at 400°C for 2 hours to obtain MnCo 2 o 4 nanoparticles; for the obtained MnCo 2 o 4 Electron microscope analysis of nanoparticles shows that they have a dendri...

Embodiment 3

[0039] (1) Glassy carbon electrode pretreatment: Polish the glassy carbon electrode with 0.3, 0.1, 0.05 μm alumina powder to the mirror surface in turn, and then ultrasonically clean it with ethanol and deionized water for 3 minutes respectively to obtain the pretreated glassy carbon electrode;

[0040] (2)MnCo 2 o 4 Preparation: CoCl 2 ·6H 2 O, MnCl 2 ·H 2 O, ammonium fluoride, and hexamethylenetetramine were dissolved in 100 mL of deionized water according to a molar ratio of 1:1:5:10, and ultrasonicated for 5 minutes to form a uniform solution, which was then transferred to an autoclave. React at 120°C for 12 hours, cool to room temperature after the reaction is complete, filter the product, wash with acetone and deionized water, and dry in vacuum at 50°C for 8 hours, then calcinate the dried product at 350°C for 2 hours to obtain MnCo 2 o 4 nanoparticles; for the obtained MnCo 2 o 4 Electron microscope analysis of nanoparticles shows that they have a dendritic stru...

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Abstract

The invention discloses a preparation method of an MnCo2O4 / polyaniline composite-modified glassy carbon electrode and a method of using the electrode for electrochemical detection on quercetin. The preparation method comprises: dispersing CoCl2.6H2O, MnCl2.H2O, ammonium fluoride and hexamethylenetetramine into an aqueous solution to prepare MnCo2O4 by a hydrothermal method, modifying a surface ofthe glassy carbon electrode therewith, and then using a method of electrochemical polymerization to modify the surface of the electrode with polyaniline to obtain an MnCo2O4 / polyaniline composite to modify the glassy carbon electrode. Differential pulse voltammetry is also used for detecting the quercetin. A linear range is wide, sensitivity is high, the electrode can be used for multiple times, and operation is convenient.

Description

technical field [0001] The present invention relates to the field of electrochemistry, in particular to a kind of MnCo 2 o 4 / The preparation method of polyaniline modified glassy carbon electrode, and its application to the electrochemical detection of quercetin. Background technique [0002] Quercetin (Quercetin) exists in the flowers, leaves and fruits of many plants, mostly in the form of glycosides, such as rutin (rutin), quercetin, hyperoside and other plants with high content, for Quercetin has a double bond between the 2 and 3 positions in its molecule, and 2 hydroxyl groups at the 37 and 47 positions, so it can function as a free radical acceptor produced in metal chelation or oxidation processes such as oils and fats. As an antioxidant of oil and ascorbic acid, it can be used as a medicine, which has good expectorant and cough-relieving effects, and has a certain anti-asthma effect. In addition, it also has the effects of lowering blood pressure, enhancing capil...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/48B01J31/32
CPCB01J31/32G01N27/308G01N27/48
Inventor 孟青
Owner CHONGQING CHANGFENG CHEM IND