Graphene oxide-amino-beta-cyclodextrin/black phosphorus modified glassy carbon electrode as well as preparation method and application thereof

A glassy carbon electrode and graphene technology, applied in the field of electrochemistry, can solve the problems of low stability and weak recognition ability, and achieve the effects of reducing interface resistance, high selectivity, high electrochemical signal and chiral recognition specificity

Active Publication Date: 2021-06-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the stability of the electrode for the detection of amino acid enantiomers is low, and the recognition ability is weak. In order to further improve the stability and recognition ability of the electrode for the detection of amino acid enantiomers, it is still very important to continue to develop modified materials for the modification of glassy carbon electrodes. of

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  • Graphene oxide-amino-beta-cyclodextrin/black phosphorus modified glassy carbon electrode as well as preparation method and application thereof
  • Graphene oxide-amino-beta-cyclodextrin/black phosphorus modified glassy carbon electrode as well as preparation method and application thereof
  • Graphene oxide-amino-beta-cyclodextrin/black phosphorus modified glassy carbon electrode as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation steps of the single-layer graphene oxide-amino-β-cyclodextrin / black phosphorus nanosheet modified glassy carbon electrode in this example are as follows:

[0042] S1: Pipette 0.1mL monolayer graphene oxide aqueous phase dispersion (10.0mg g -1 ), dispersed in 10.0mL ultrapure water, and then ultrasonicated for 1min to disperse evenly; respectively added 10.0mg of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride and 10.0 mg of N-hydroxysuccinimide, placed on a magnetic stirrer and stirred for 2 hours to obtain a mixed dispersion; then weigh 10.0 mg of amino-β-cyclodextrin and dissolve it in 10.0 mL of 0.1M acetic acid solution to obtain amino- β-cyclodextrin solution, add the obtained amino-β-cyclodextrin solution dropwise to the above mixed dispersion, and continue to stir for 4 hours; After washing 3 times, the filter cake was finally dispersed in 10.0 mL ultrapure water to obtain a single-layer graphene oxide-amino-β-cyclodextrin composite...

Embodiment 2

[0047] The preparation steps of the single-layer graphene oxide-amino-β-cyclodextrin / black phosphorus nanosheet modified glassy carbon electrode in this example are as follows:

[0048] S1: Pipette 0.4mL monolayer graphene oxide aqueous phase dispersion (10.0mg g -1 ), dispersed in 20.0mL ultrapure water, and then ultrasonically 3min to disperse evenly; respectively added 80.0mg of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride and 80.0 mg of N-hydroxysuccinimide was stirred and activated on a magnetic stirrer for 4 hours to obtain a mixed dispersion; then 30.0 mg of amino-β-cyclodextrin was weighed and dissolved in 60.0 mL of 0.5M acetic acid solution to obtain amino -β-cyclodextrin solution, add the obtained amino-β-cyclodextrin solution dropwise to the above mixed dispersion, and continue to stir and react for 8 hours; After washing with water for 4 times, the filter cake was finally dispersed in 5.0 mL of ultrapure water to obtain a single-layer graphene oxi...

Embodiment 3

[0053] The preparation steps of the single-layer graphene oxide-amino-β-cyclodextrin / black phosphorus nanosheet modified glassy carbon electrode in this example are as follows:

[0054] S1: Pipette 0.5mL monolayer graphene oxide aqueous phase dispersion (10.0mg g -1 ), dispersed in 100.0mL ultrapure water, and then ultrasonicated for 5min to disperse evenly; respectively added 100.0mg of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride and 100.0 mg of N-hydroxysuccinimide, placed on a magnetic stirrer and stirred for 3 hours to obtain a mixed dispersion; then weigh 100.0 mg of amino-β-cyclodextrin and dissolve it in 50.0 mL of 1.0M acetic acid solution to obtain amino -β-cyclodextrin solution, add the obtained amino-β-cyclodextrin solution dropwise to the above mixed dispersion, and continue to stir and react for 10 hours; After washing with water for 5 times, the filter cake was finally dispersed in 10.0 mL of ultrapure water to obtain a single-layer graphene oxi...

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Abstract

The invention provides a graphene oxide-amino-beta-cyclodextrin/black phosphorus modified glassy carbon electrode, a preparation method and application thereof, an electrode glassy carbon electrode and a single-layer graphene oxide-amino-beta-cyclodextrin/black phosphorus nanosheet composite coating coated on the surface of the electrode glassy carbon electrode. The preparation method comprises the following steps: S1, preparing a single-layer graphene oxide-amino-beta-cyclodextrin composite material dispersion liquid; S2, performing stripping to obtain black phosphorus nanosheet dispersion liquid; S3, obtaining a single-layer graphene oxide-amino-beta-cyclodextrin/black phosphorus nanosheet dispersion liquid in a self-assembly mode; and S4, dispensing the dispersion liquid obtained in S3 on the surface of a glassy carbon electrode, and airing to obtain the single-layer graphene oxide-amino-beta-cyclodextrin/black phosphorus nanosheet modified glassy carbon electrode. The electrode disclosed by the invention has good stability, specificity and chiral recognition capability on the amino acid enantiomers, and has good qualitative and quantitative analysis application prospects of the amino acid enantiomers.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to a graphene oxide-amino-β-cyclodextrin / black phosphorus modified glassy carbon electrode and its preparation method and application. Background technique [0002] As a basic chemical property of the living world, chirality has a great influence on the life process. Enantioselective identification of chiral compounds is extremely important in medicine and biotechnology. Amino acids, most of which have chiral characteristics, are important enantiomeric compounds that can be used as important biomarkers for the assessment of various metabolic diseases. Since the L / D chiral enantiomers of amino acids have exactly the same chemical and physical properties, but their biological activities are completely different, in order to screen, diagnose and treat metabolic diseases, they are identified in medicine, biology and chemistry. Amino acid enantiomers are of great interest. ...

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 于金刚邹娇刘一平陈晓青
Owner CENT SOUTH UNIV
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