Graphene nano material-modified glassy carbon electrode based on phytic acid dispersion, preparation method and application

A glassy carbon electrode and nanomaterial technology, applied in the fields of electrochemistry and nanomaterials, can solve the problems of slow response time and poor reproducibility of detection electrodes, and achieve fast response time, good electrocatalytic oxidation activity, and good reproducibility. Effect

Inactive Publication Date: 2015-07-08
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently used sensors have poor reproducibility of detection electrodes and slow response times

Method used

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  • Graphene nano material-modified glassy carbon electrode based on phytic acid dispersion, preparation method and application
  • Graphene nano material-modified glassy carbon electrode based on phytic acid dispersion, preparation method and application
  • Graphene nano material-modified glassy carbon electrode based on phytic acid dispersion, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Grind the glassy carbon electrode with 0.3 μm aluminum powder, then ultrasonically treat it with ultrapure water, absolute ethanol, and ultrapure water for 4 minutes, and dry it at room temperature to obtain a clean glassy carbon electrode, which is ready for use;

[0029] (2) Disperse 1 mg of graphene (synthesized graphite oxide by modified Hummers method, and then reduce graphite oxide by hydrazine hydrate method) in 1 mL of phytic acid solution with a mass concentration of 50%, and ultrasonically treat it for 6 hours to obtain a mass concentration of 1 mg The phytic acid dispersion of graphene / mL;

[0030] (3) Immerse the clean glassy carbon electrode in the phytic acid dispersion of graphene with a mass concentration of 1mg / mL in step (2), self-assemble for 1.5h, take it out, wash it with ultrapure water, and dry it to get A glassy carbon electrode modified by phytic acid-dispersed graphene nanomaterials can be used for the detection of acetaminophen.

Embodiment 2

[0032] (1) Grind the glassy carbon electrode with 0.3 μm aluminum powder, then ultrasonically treat it with ultrapure water, absolute ethanol, and ultrapure water for 5 minutes, and dry it at room temperature to obtain a clean glassy carbon electrode, which is ready for use;

[0033] (2) Disperse 0.1 mg of graphene (the graphite oxide was synthesized by the modified Hummers method, and then reduced by the hydrazine hydrate method) in 1 mL of phytic acid solution with a mass concentration of 50%, and ultrasonically treated for 6 hours to obtain a mass concentration of Phytic acid dispersion of graphene at 0.1 mg / mL;

[0034] (3) Dip the clean glassy carbon electrode in the phytic acid dispersion of graphene with a mass concentration of 0.1 mg / mL in step (2), self-assemble for 2.5 hours, wash it with ultrapure water after taking it out, and dry it in the air. A glassy carbon electrode modified based on phytic acid-dispersed graphene nanomaterials was obtained, which can be used ...

Embodiment 3

[0036] (1) Grind the glassy carbon electrode with 0.3 μm aluminum powder, then ultrasonically treat it with ultrapure water, absolute ethanol, and ultrapure water for 3 minutes, and dry it at room temperature to obtain a clean glassy carbon electrode for use;

[0037] (2) Disperse 4 mg of graphene (synthesized graphite oxide by modified Hummers method, and then reduce graphite oxide by hydrazine hydrate method) in 1 mL of phytic acid solution with a mass concentration of 50%, and ultrasonically treat it for 6 hours to obtain a mass concentration of 4 mg The phytic acid dispersion of graphene / mL;

[0038] (3) Immerse the clean glassy carbon electrode in the phytic acid dispersion of graphene with a mass concentration of 4 mg / mL in step (2), self-assemble for 2.5 hours, take it out, wash it with ultrapure water, and dry it to obtain A glassy carbon electrode modified by phytic acid-dispersed graphene nanomaterials can be used for the detection of acetaminophen.

[0039] Performan...

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Abstract

The invention belongs to the electrochemistry and nano material technical fields, and especially relates to a graphene nano material-modified glassy carbon electrode based on phytic acid dispersion, a preparation method and an application of the electrode in detection of acetaminophen. The preparation method is as follows: graphene is dispersed in a phytic acid solution, and is subjected to ultrasonic treatment for 4-8 h to obtain a phytic acid dispersion liquid of graphene; a clean glassy carbon electrode is soaked in the phytic acid dispersion liquid of graphene, subjected to self-assembly for 1-4 h, washed and dried; the mass concentration of the phytic acid solution is 30-60%. The glassy carbon has advantages of electrode low preparation cost, simple preparation method and environment protection. The glassy carbon electrode can be applied to detection of acetaminophen, and has good electrocatalytic oxidation activity to detection of acetaminophen. The glassy carbon electrode is advantaged by fast response time, wild linearity range, good reproducibility high stability and freedom from interference of coexisting electroactive substances.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry and nanometer materials, and in particular relates to a glassy carbon electrode modified by phytic acid-dispersed graphene nanomaterials, a preparation method thereof, and the use of the electrode for the detection of acetaminophen. Background technique [0002] Graphene is made of sp 2 The monolayer planar graphite, which is bonded by hybrid carbon atoms and has a hexagonal lattice honeycomb two-dimensional structure, is favored by researchers because of its unique structure, high mechanical strength, tunable optical properties and electrical conductivity. Graphene has been used in many fields: such as sensors, capacitors and fuel cells. However, in practical applications, graphene sheets are prone to agglomeration, which greatly affects the application of graphene. Therefore, organic solvents or aqueous surfactant solutions are usually used as graphene dispersions, relying on electrost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/416
Inventor 文颖刘桂亭陈惠芬林国明王小萍郭小玉杨海峰
Owner SHANGHAI NORMAL UNIVERSITY
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