Aminated multi-walled carbon nanotube electrochemical sensor and application thereof in quercetin detection

A technology of multi-walled carbon nanotubes and amination, applied in the direction of material electrochemical variables, scientific instruments, instruments, etc., can solve the problems of low sensitivity and high detection limit, and achieve the effect of improving sensitivity, sensitive results, and enhancing electrocatalytic performance

Pending Publication Date: 2020-04-10
ZHAOQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although carbon nanotube materials are used in the preparation process of some existing electrochemical sensors, there are still some problems of low sensitivity and high detection limit.

Method used

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  • Aminated multi-walled carbon nanotube electrochemical sensor and application thereof in quercetin detection
  • Aminated multi-walled carbon nanotube electrochemical sensor and application thereof in quercetin detection
  • Aminated multi-walled carbon nanotube electrochemical sensor and application thereof in quercetin detection

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Experimental program
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Effect test

Embodiment 1

[0034] A preparation of an aminated multi-walled carbon nanotube electrochemical sensor, comprising the following steps:

[0035] (1) Treatment of glassy carbon electrodes:

[0036] A glassy carbon electrode with a diameter of 3 mm was first polished with γ-alumina with a particle size of 0.05 μm, then ultrasonically cleaned with double distilled water, and dried at room temperature to obtain a glassy carbon electrode pretreatment;

[0037] (2) Modification of aminated multi-walled carbon nanotubes:

[0038] Taking the dispersion of aminated multi-walled carbon nanotubes and coating it dropwise on the surface of the glassy carbon electrode pretreatment, and placing it under an infrared lamp to irradiate until it dries to obtain an aminated multi-walled carbon nanotube modified electrode pretreatment;

[0039] (3) Construction of aminated multi-walled carbon nanotube modified electrode:

[0040] The aminated multi-walled carbon nanotube modified electrode pretreatment is plac...

Embodiment 2

[0047] A preparation of an aminated multi-walled carbon nanotube electrochemical sensor, comprising the following steps:

[0048] (1) Treatment of glassy carbon electrodes:

[0049] A glassy carbon electrode with a diameter of 3 mm was first polished with γ-alumina with a particle size of 0.05 μm, then ultrasonically cleaned with double distilled water, and dried at room temperature to obtain a glassy carbon electrode pretreatment;

[0050] (2) Modification of aminated multi-walled carbon nanotubes:

[0051] Aminated multi-walled carbon nanotube dispersion liquid with a concentration of 1 mg / mL is drop-coated on the surface of the glassy carbon electrode pretreatment, and placed under an infrared lamp to irradiate until dry to obtain an aminated multi-walled carbon nanotube modified electrode pretreatment thing;

[0052] (3) Construction of aminated multi-walled carbon nanotube modified electrode:

[0053] The aminated multi-walled carbon nanotube modified electrode pretrea...

Embodiment 3

[0060]The application of electrochemical sensor in the detection of quercetin, specifically:

[0061] The electrochemical sensor is placed in an electrolytic cell loaded with electrolyte, and the concentration of quercetin in the analyte is detected by differential pulse voltammetry;

[0062] Wherein, the electrolytic solution is a PBS buffer solution with a concentration of 0.2mol / L; the volume of the electrolytic cell is 25mL, and the loading electrolyte volume is 20mL during each detection, and an electromagnetic stirrer is used to stir; the liquid pH in the electrolytic cell= 4;

[0063] Before detecting quercetin, feed high-purity nitrogen gas to remove dissolved oxygen in the electrolyte.

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Abstract

The invention relates to the technical field of electrochemical sensing detection, in particular to an aminated multi-walled carbon nanotube electrochemical sensor and application thereof in quercetindetection. The invention discloses the aminated multi-walled carbon nanotube electrochemical sensor and application thereof in quercetin detection. The application comprises the following steps of: preparation of the aminated multi-walled carbon nanotube electrochemical sensor; and use of the electrochemical sensor for detecting quercetin. The electrochemical sensor overcomes the defects of too tedious method, complex steps and the like during quercetin detection in the prior art, better improves the detection sensitivity, is easy to achieve automation of quercetin detection.

Description

technical field [0001] The invention relates to the field of electrochemical sensors, in particular to an aminated multi-walled carbon nanotube electrochemical sensor and its application in detecting quercetin. Background technique [0002] Quercetin, also known as quercetin, quercetin, is a polyhydroxy flavonoid compound. Widely present in the flowers, leaves and fruits of plants, it has various biological activities. Quercetin not only has the effects of expectorant, cough, asthma, anti-allergy, anti-inflammation, and anti-oxidation, but also has the effects of lowering blood pressure, lowering blood lipids, anti-tumor, anti-platelet coagulation, dilating coronary arteries, and inhibiting the production of aflatoxin, etc. It has high medicinal value and good pharmacological effects. [0003] Electrochemical sensor is a type of sensor based on the principle of electrochemical reaction to detect the target. It uses electrodes as sensor conversion elements, and the material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/308G01N27/48
Inventor 刘艳清汪洪武姚夙朱培杰叶银坚
Owner ZHAOQING UNIV
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