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Graphene-metal organic framework composite material modified electrode preparation method

A technology of metal-organic frameworks and composite materials, which is applied in the field of preparation of graphene-metal-organic framework composite materials modified electrodes, can solve the problems of poor electrochemical activity of MOF materials, achieve strong repeatability, large surface area, and simple synthesis process Effect

Active Publication Date: 2018-02-16
SHANGQIU NORMAL UNIVERSITY
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide a method for preparing a graphene-metal organic framework composite modified electrode for the problem of poor electrochemical activity of MOF materials in the prior art

Method used

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Experimental program
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Effect test

Embodiment 1

[0047] Embodiment 1 Preparation of graphene / MOF composite modified electrode

[0048] First, 3.6 mmol of copper nitrate trihydrate was stirred and dissolved in 12 mL of H 2 O; secondly, disperse 2.0 mmol of trimesic acid in 12 mL of absolute ethanol with ultrasonic stirring. Then, mix and shake the two, pour them into a 40mL stainless steel high-temperature reaction kettle, and react at 75°C for 8 days; cool to room temperature, and filter the obtained copper-based MOF suspension to filter out large-particle copper-based MOF Material, the filtrate was divided into 5mL aliquots and placed in weighing bottles.

[0049] Then, a 10×10×3 mm glassy carbon sheet was smoothed with 0.5 μm alumina powder on a polishing cloth, then ultrasonically cleaned in acetone and pure water for 10 minutes, and dried with high-purity nitrogen. Next, use a pipette gun to pipette 10 μL of 0.2 mg / mL carboxylated graphene solution and drop-coat it on the surface of the clean glassy carbon sheet, and d...

Embodiment 2

[0051] Embodiment 2 Preparation of graphene / MOF composite modified electrode

[0052] First, 1 mmol of copper nitrate trihydrate was stirred and dissolved in 6 mL of H 2 O; secondly, disperse 2.0 mmol of trimesic acid in 12 mL of absolute ethanol with ultrasonic stirring. Then, mix and shake the two, pour them into a 40mL stainless steel high-temperature reaction kettle, and react at 65°C for 10 days; cool to room temperature, and suction-filter the obtained copper-based MOF suspension to filter out large-particle copper-based MOF Material, the filtrate was divided into 5mL aliquots and placed in weighing bottles.

[0053] Then, a 10×10×3 mm glassy carbon sheet was smoothed with 0.5 μm alumina powder on a polishing cloth, then ultrasonically cleaned in acetone and pure water for 10 minutes, and dried with high-purity nitrogen. Next, use a pipette gun to pipette 10 μL of 0.4 mg / mL carboxylated graphene solution and drop-coat it on the surface of the clean glassy carbon sheet,...

Embodiment 3

[0055] Embodiment 3 Preparation of graphene / MOF composite modified electrode

[0056] First, 5 mmol of copper nitrate trihydrate was stirred and dissolved in 18 mL of H 2 O; secondly, disperse 2.0 mmol of trimesic acid in 12 mL of absolute ethanol with ultrasonic stirring. Then, the two were mixed and shaken, poured into a 40mL stainless steel high-temperature reaction kettle, and reacted at 85°C for 6 days; cooled to room temperature, and the resulting suspension of copper-based MOF was suction-filtered to filter out large-particle copper-based MOF Material, the filtrate was divided into 5mL aliquots and placed in weighing bottles.

[0057] Then, a 10×10×3 mm glassy carbon sheet was smoothed with 0.5 μm alumina powder on a polishing cloth, then ultrasonically cleaned in acetone and pure water for 10 minutes, and dried with high-purity nitrogen. Next, use a pipette gun to pipette 10 μL of 0.3 mg / mL carboxylated graphene solution and drop-coat it on the surface of the clean g...

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Abstract

The present invention provides a graphene-metal organic framework composite material modified electrode preparation method, which comprises: modifying an electrode by using graphene, soaking the modified electrode in a previously prepared solution containing a metal organic framework material, carrying out a reaction, taking out, washing, and drying to obtain the graphene-metal organic framework composite material modified electrode. According to the present invention, the prepared graphene-metal organic framework composite material modified electrode has advantages of large surface area, biocompatibility and electrochemical activity on the electrode surface, and has wide application prospects in the fields of biosensing, electrochemical catalysis, and the like.

Description

technical field [0001] The invention relates to the technical fields of functional material preparation and electrochemistry, in particular to a preparation method of a graphene-metal organic framework composite modified electrode. Background technique [0002] In recent years, metal-organic framework (MOF) materials have attracted extensive attention due to their large specific surface area, periodically adjustable pore size, and detachable chemical properties. MOF materials generally have variable topological structures, and the size, shape, and composition of holes can be adjusted by selecting different ligands and metal ions or changing the synthesis strategy. More importantly, the functionality of the skeleton is not limited to its own porosity, but can also benefit from the magnetism and catalytic properties of its own metal, or the chirality or fluorescence of the ligand, etc., and can also come from the synergistic effect of the two. . Therefore, MOF materials prov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
Inventor 周艳丽李聪明刘澜涛刘双徐茂田
Owner SHANGQIU NORMAL UNIVERSITY
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