Porous graphene oxide color-changing composite film and preparation method thereof

A composite film and fossil technology, applied in the direction of material electrochemical variables, instruments, measuring devices, etc., can solve the problems of limited physical size, limited practical application, etc., and achieve the effect of improving stability, stabilizing porous structure, and simple preparation

Active Publication Date: 2021-06-11
重庆致贯科技有限公司
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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

[0025] A kind of porous graphene oxide color-changing composite film, its preparation method is:

[0026] (1) Clean the 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 ultrasonically vibrate to make the nano-graphite powder penetrate into the pores of the porous nickel foam substrate for later use. ; Wherein, the size of the porous nickel foam substrate is 2cm×2cm, the thickness is 0.3mm, the particle size range of the nano-graphite powder is 20-500nm; the pore size range of the porous nickel foam substrate is 1-100um;

[0027] (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 applied to carry out an oxidation reaction to obtain...

Embodiment 2

[0031] A kind of porous graphene oxide color-changing composite film, its preparation method is:

[0032] (1) Clean the 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 ultrasonically vibrate to make the nano-graphite powder penetrate into the pores of the porous nickel foam substrate for later use. ; Wherein, the size of the porous nickel foam substrate is 2cm×2cm, the thickness is 0.6mm, the particle size range of the nano-graphite powder is 20-500nm; the pore size range of the porous nickel foam substrate is 1-100um;

[0033] (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 Ultrasonic vibration is applied to carry out an oxidation r...

Embodiment 3

[0037] A kind of porous graphene oxide color-changing composite film, its preparation method is:

[0038] (1) Clean the 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 ultrasonically vibrate to make the nano-graphite powder penetrate into the pores of the porous nickel foam substrate for later use. ; Wherein, the size of the porous nickel foam base is 2cm×2cm, the thickness is 1mm, the particle size range of the nano-graphite powder is 20-500nm; the pore size range of the porous nickel foam base is 1-100um;

[0039] (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 vibration is applied to carry out an oxidation reaction to obtain gr...

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PUM

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Abstract

The invention relates to a porous graphene oxide color-changing composite film, comprising a porous nickel foam substrate, porous graphene oxide loaded on the surface of the porous nickel foam substrate, aminosilane coupled and grafted on the porous graphene oxide, and aminosilane modified on the amino 2,6‑bis(2‑pyridyl)isonicotinic acid group on silane. Using nickel foam as the substrate, the raw material nano-graphite powder is infiltrated into its porous structure by means of ultrasonic vibration, and then oxidized in situ, so that the oxidized graphene oxide is stably loaded on the surface of the porous nickel foam substrate, and the corresponding The porous graphene oxide structure is stable and reliable, and can provide a rich and stable porous structure. At the same time, with the coupling grafting of aminosilane and the surface modification of 2,6-bis(2-pyridyl)isonicotinic acid group, a graphene-based composite film for electrochemiluminescent sensors with stable performance can be obtained.

Description

technical field [0001] The invention belongs to the field of graphene oxide composite film preparation, and in particular relates to a porous graphene oxide color-changing composite film 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] Especially in sensing and detection, it is often combined with terpyridine ruthenium, and is widely used in the preparation of electrochemiluminescent sensors. Among them, ruthenium terpyridine ([Ru(bpy)3 2+ ]) is a commonly used material for electrochemiluminescent probes, which has the advantages of easy operation and high sensitivity, and can be used in various fields such as medical drug detection and analysis, environmental analysis, etc. However, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/327G01N27/30
CPCG01N27/308G01N27/3278
Inventor 张瑞秀
Owner 重庆致贯科技有限公司
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