Graphene-based electrochemical luminescence sensor and preparation method thereof

An alkene-based electrochemistry, sensor technology, applied in chemiluminescence/bioluminescence, material electrochemical variables, scientific instruments, etc., can solve the problems of limited physical size and limited practical application, and achieve excellent detection effect and stable porous structure. , the effect of improving stability

Active Publication Date: 2020-08-07
丁道其
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prepared graphene quantum dots are dispersed particles, and the final terpyridine-modified graphene quantum dot composite has limited physical size, which is limited in practical application and is only suitable for laboratory use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A graphene-based electrochemiluminescent sensor, the preparation method of which is:

[0027] (1) Clean the cylindrical porous nickel foam substrate to remove the oxide film on the surface, then embed the cleaned porous nickel foam substrate in nano-graphite powder, and vibrate ultrasonically to make the nano-graphite powder penetrate into the pores of the porous nickel foam substrate , standby; wherein, the inner diameter of the cylindrical porous nickel foam substrate is 4mm, the thickness is 0.5mm, and the height is 15mm; the particle diameter range of the nano-graphite powder is 20-500nm; the pore diameter range of the porous nickel foam substrate 1-100um;

[0028] (2) Immerse the porous nickel base impregnated with nano-graphite powder in 200ml of concentrated sulfuric acid solution with a mass percent concentration of 98%, then add 30ml of potassium permanganate solution, stir evenly, heat up to 90°C, and add hydrogen peroxide dropwise Ultrasonic vibration is app...

Embodiment 2

[0032] A graphene-based electrochemiluminescent sensor, the preparation method of which is:

[0033] (1) Clean the cylindrical porous nickel foam substrate to remove the oxide film on the surface, then embed the cleaned porous nickel foam substrate in nano-graphite powder, and vibrate ultrasonically to make the nano-graphite powder penetrate into the pores of the porous nickel foam substrate , standby; wherein, the inner diameter of the cylindrical porous nickel foam substrate is 3mm, the thickness is 0.2mm in thickness, and the height is 10mm; the particle size range of the nano-graphite powder is 20-500nm; the pore size range of the porous nickel foam substrate 1-100um;

[0034] (2) Immerse the porous nickel base impregnated with nano-graphite powder in 200ml of concentrated sulfuric acid solution with a mass percent concentration of 98%, then add 40ml of potassium permanganate solution, stir evenly, heat up to 80°C, and add hydrogen peroxide dropwise at the same time Ultra...

Embodiment 3

[0038] A graphene-based electrochemiluminescent sensor, the preparation method of which is:

[0039] (1) Clean the cylindrical porous nickel foam substrate to remove the oxide film on the surface, then embed the cleaned porous nickel foam substrate in nano-graphite powder, and vibrate ultrasonically to make the nano-graphite powder penetrate into the pores of the porous nickel foam substrate , standby; wherein, the inner diameter of the tubular porous nickel foam substrate is 5mm, the thickness is 0.8mm in thickness, and the height is 20mm; the particle size range of the nano-graphite powder is 20-500nm; the pore size range of the porous nickel foam substrate 1-100um;

[0040] (2) Immerse the porous nickel base impregnated with nano-graphite powder in 200ml of concentrated sulfuric acid solution with a mass percent concentration of 98%, then add 50ml of potassium permanganate solution, stir evenly, heat up to 90°C, and drop hydrogen peroxide at the same time Ultrasonic vibrat...

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PUM

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Abstract

The invention relates to a graphene-based electrochemical luminescence sensor. Cylindrical porous foamed nickel is taken as a substrate, and the sensor is characterized by further comprising porous graphene oxide loaded on the surface of the cylindrical porous foamed nickel substrate, amino silane coupled and grafted on the porous graphene oxide, and a 2, 6-bis (2-pyridyl) isonicotinic acid groupmodified on the amino silane. In the preparation process, electrode cylindrical porous foamed nickel of the sensor is directly used as a substrate, and graphite powder is oxidized in situ in pores, soporous graphene oxide is stably loaded on the surface of the cylindrical porous foamed nickel substrate, and the porous graphene oxide is stable and reliable in structure and can provide rich and stable porous structures. Meanwhile, by matching with coupling grafting of amino silane and surface modification of 2, 6-di (2-pyridyl) isonicotinic acid groups, the graphene-based composite film with stable performance for the electrochemical luminescence sensor can be obtained.

Description

technical field [0001] The invention belongs to the field of electrochemiluminescence sensors, in particular to a graphene-based electrochemiluminescence sensor and a preparation method thereof. Background technique [0002] Graphene has excellent optical, electrical, and mechanical properties, and has important application prospects in materials science, micro-nano processing, energy, sensing, biomedicine, and drug delivery. It is considered to be a revolutionary material in the future. [0003] Ruthenium terpyridine ([Ru(bpy)3 2+ ]) is a commonly used electrochemiluminescence signal source, which has the advantages of easy operation and high sensitivity, and can be used in various fields such as the detection and analysis of medical drugs and environmental analysis. Loading the terpyridine material on the surface of graphene to make an electrochemiluminescence sensor can make full use of the advantages of both, and obtain an electrochemiluminescence sensor with excellent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N21/76
CPCG01N21/76G01N27/308
Inventor 张瑞秀
Owner 丁道其
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