A kind of preparation method of functionalized graphene aerogel microspheres

An aerogel and graphene technology, which is applied in the field of preparation of functionalized graphene aerogel microspheres, can solve the problems of low electronic conductivity, low sensitivity, and large degree of overlap, and achieves easy target-target binding, sensitive Electrochemical response, effect of reducing the degree of overlap

Active Publication Date: 2020-03-24
JIANGNAN UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the graphene aerogels prepared by the prior art still have great defects, so that their application in many aspects is not ideal and is limited to a certain extent.
1) At present, graphene aerogels are prepared by using large sheets of graphene oxide (sheet diameters ranging from several microns to tens of microns), and the specific surface of the product is small due to the large degree of overlap between sheets
2) Graphene prepared by the prior art is a large monolithic material, and it needs to be crushed into small particles during use, which not only brings inconvenience to use, but also causes some damage to the graphene aerogel due to the characteristic structure being damaged during the crushing process. loss of performance
3) The internal structure of the graphene airgel prepared by the prior art is sparse, and the electronic conductivity is low, which leads to the unsatisfactory electrocatalytic activity and low sensitivity as a sensor application
Therefore, the electrochemical sensors based on this graphene aerogel have poor selectivity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of functionalized graphene aerogel microspheres
  • A kind of preparation method of functionalized graphene aerogel microspheres
  • A kind of preparation method of functionalized graphene aerogel microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of graphene airgel

[0033] Disperse 400mg of folic acid / octadecanine graphene oxide in 50ml of secondary water, ultrasonically disperse (more than 2 minutes) for 10 hours to disperse evenly, add 50mL of toluene, and stir vigorously with a homogenizer (10000 rpm, more than 1 minute) for 2 minutes , put into liquid nitrogen for quick freezing for 10 minutes, and then freeze-dry to obtain graphene oxide airgel. Then put it into a tube furnace and heat it with pure hydrogen to 400 degrees Celsius for 3 hours to obtain functionalized graphene airgel microspheres.

[0034] (2) Functionalized graphene airgel microspheres are applied to electrochemical sensors to detect liver cancer cells

[0035] Take 1 mg of the prepared functionalized graphene airgel microspheres and dissolve them in 1 mL of water, ultrasonically treat them for 5 hours, add 0.01% chitosan, fully oscillate and disperse evenly, take 5 μL and drop them on the surface of the (glassy carbon) ele...

Embodiment 2

[0039] (1) Preparation of functionalized graphene airgel microspheres

[0040] Disperse 500mg of octadecylamine graphene oxide in 100ml of secondary water, ultrasonically disperse for 10 hours to disperse evenly, add 100mL of toluene, stir vigorously with a homogenizer for 2 minutes, put it into an ultra-low temperature refrigerator for 30 minutes, and freeze-dry to obtain graphite oxide ene airgel. Then put it into a tube furnace and heat it to 600 degrees Celsius for 2 hours with pure carbon monoxide gas to obtain functionalized graphene airgel microspheres. The functionalized graphene airgel microspheres were applied to the electrochemical sensor to detect hydroquinone, and the detection limit could reach 2.0×10 -11 mol / L.

[0041] (2) Functionalized graphene airgel microspheres applied to electrochemical sensors for detection of hydroquinone

[0042] Take 1mg of the prepared airgel and dissolve it in 1mL of water, ultrasonicate for 5 hours, add 0.01% chitosan, fully osc...

Embodiment 3

[0045] 800mg of carboxyl / decyl graphene oxide was dispersed in 50ml of secondary water, ultrasonically dispersed for 10 hours to disperse evenly, added 100mL of toluene, stirred vigorously by a homogenizer for 2 minutes, put it into an ultra-low temperature refrigerator for 30 minutes, and then freeze-dried to obtain Graphene oxide airgel. Then put it into a tube furnace and heat it to 200 degrees Celsius for 10 hours with pure carbon monoxide gas to obtain functionalized graphene airgel microspheres. With reference to the method in Example 2, the functionalized graphene airgel microspheres are applied to electrochemical sensors to detect hydrogen peroxide, and the detection limit can be made to reach 1.0 × 10 -9 mol / L.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
diameteraaaaaaaaaa
capacitanceaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for preparing a functionalized graphene aerogel microsphere, and belongs to the field of chemical industry. The new functionalized graphene aerogel microsphere with alarge specific surface and sensitive electrochemical response is designed and synthesized in the invention. Additionally, the functionalized graphene aerogel microsphere prepared in the invention is formed by particles having a size of only a few micrometers, has a large polarity, and can be easily dispersed in water or other solvents, so the functionalized graphene aerogel microsphere can be easily applied to the field of sensors or energy storage.

Description

technical field [0001] The invention relates to a preparation method of functionalized graphene airgel microspheres, belonging to the field of chemical industry. Background technique [0002] Graphene was obtained in 2004 by physicists Anderw Geim and Konstantin Novoselov of the University of Manchester in the United Kingdom through mechanical exfoliation. Since then, it has been widely studied and modified, and has been applied in many fields (K.S.A. Two-dimensional gas of maslesdiracfermions in graphene, Nature 438(2005) 197-200). [0003] The structural unit of graphene gel is graphene, which combines the advantages of gel and graphene to construct a material with a continuous porous three-dimensional network structure, which not only retains the excellent optical, mechanical and electrical functions of graphene, but also It has the properties of airgel porous light, large specific surface area (F.Li, L.J.Xie, G.H.Sun, Q.Q.Kong, F.Y.Su, H.Lei, X.Y.Guo, B.S.Zhang, C.M.Che...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184G01N27/30H01G11/42
CPCC01B2204/22C01B2204/32G01N27/308H01G11/42Y02E60/13
Inventor 李在均李瑞怡
Owner JIANGNAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap