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Method for preparing glassy carbon electrode modified by noncovalent-functionalized graphene and ionic liquid compound

A technology of glassy carbon electrodes and ionic liquids, which is applied in the field of preparation of glassy carbon electrodes modified by non-covalent functionalized graphene ionic liquid composites, can solve the problems of cumbersome operation steps and expensive instruments, and achieve good application prospects and detection The effect of limiting the minimum and reducing liquidity

Inactive Publication Date: 2015-03-25
NORTHWEST NORMAL UNIVERSITY
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Problems solved by technology

Most of these detection methods have expensive instruments and cumbersome operation steps, but the electrochemical method is just the opposite. It is widely used in L-Tyr analysis due to its advantages of fast, simple, sensitive and miniaturized.

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  • Method for preparing glassy carbon electrode modified by noncovalent-functionalized graphene and ionic liquid compound
  • Method for preparing glassy carbon electrode modified by noncovalent-functionalized graphene and ionic liquid compound
  • Method for preparing glassy carbon electrode modified by noncovalent-functionalized graphene and ionic liquid compound

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Embodiment 1

[0032] A preparation method of a non-covalent functionalized graphene ionic liquid composite modified glassy carbon electrode, comprising the following steps:

[0033] a. Mix 10mg graphene oxide and 5mM sodium dodecylbenzenesulfonate (SDBS), stir with a magnetic stirrer at room temperature for half an hour, transfer the mixture to a single-necked flask, add 200uL hydrazine, and stir with a constant temperature magnetic stirrer Heated and stirred at 80°C for 24 hours, then centrifuged in a centrifuge, rinsed with distilled water three times, and dried at 60°C to obtain SDBS-functionalized graphene (SDBS-Gr).

[0034] Dissolve 1g chitosan with 0.10M 100mL glacial acetic acid to obtain 1% chitosan aqueous solution (CS), then dissolve 1mg SDBS-Gr synthesized in step a into 5mL chitosan, ultrasonicate for half an hour, and filter under reduced pressure with a vacuum pump , then rinsed with distilled water three times, and dried at 60°C to obtain SDBS-Gr-CS. Finally, add 20 μL ioni...

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Abstract

The invention provides a method for preparing a glassy carbon electrode modified by a noncovalent-functionalized graphene and ionic liquid compound. The method comprises the following steps: firstly, noncovalently functionalizing graphene with dodecyl benzene, then combining the functionalized graphene with a chitosan polymer under electrostatic interaction, and finally adding ionic liquid to form a composite material, wherein chitosan can prevent the precipitation of a surfactant caused by direct contact of ionic liquid salt and the surfactant, and the composite material has a good microenvironment due to good electrical conductivity and biocompatibility of the ionic liquid; dispensing the composite material on the surface of a glassy carbon electrode to obtain the modified glassy carbon electrode. The modified glassy carbon electrode has a good electrochemical response on tyrosine, can be used for directly detecting tyrosine, and has the characteristics of being wide in linearity range and low in limit of detection.

Description

technical field [0001] The invention relates to a preparation method of a non-covalent functionalized graphene ionic liquid compound and a tyrosine sensor. Background technique [0002] Graphene has been widely used in many fields such as electrochemistry due to its large specific surface area, high electrical conductivity, and good biocompatibility. However, when graphene is prepared by chemical methods, due to the The π–π stacking and van der Waals interactions make graphene easy to agglomerate, which reduces the conductivity and water solubility of graphene. To reduce this agglomeration phenomenon, the surface of graphene oxide was first functionalized and then reduced. Non-covalent functionalization leads to well-dispersed carbon materials and prevents covalent functionalization from affecting graphene sp 2 damage to the structure. The hydrophobic end of the surfactant can be adsorbed to the surface of the carbon material, and the hydrophilic group (charged functional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48
Inventor 刘秀辉董明君刘盼盼卢小泉
Owner NORTHWEST NORMAL UNIVERSITY
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