Unlock instant, AI-driven research and patent intelligence for your innovation.

A self-supporting reduced graphene oxide roll network material and preparation method thereof

A graphene roll and self-supporting technology, which is applied in the field of nanomaterials, can solve the problems of composition, structure, and scale limitation, the inability to prepare graphene oxide rolls, and the inability to form a self-supporting structure, so as to achieve low cost, avoid stacking, good connection effect

Active Publication Date: 2021-03-16
INST OF PHYSICS - CHINESE ACAD OF SCI
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sample obtained by the above method is generally dispersed graphene roll powder, which cannot form a self-supporting structure. At the same time, the above method cannot prepare graphene oxide rolls. The roll diameter of the prepared graphene rolls is generally below 1000nm, and its composition, structure, The scale range is limited, which greatly affects its application field

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 self-supporting reduced graphene oxide roll network material and preparation method thereof
  • A self-supporting reduced graphene oxide roll network material and preparation method thereof
  • A self-supporting reduced graphene oxide roll network material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0072] Figure 4 It is a schematic flow chart of the preparation method of the self-supporting reduced graphene oxide roll network structure material according to an embodiment of the present invention. like Figure 4 Shown, the preparation method of a kind of self-supporting reduced graphene oxide volume network structure material provided by the present invention can generally comprise the following steps:

[0073] S1, configure a uniformly mixed mixed solution of graphene oxide dispersion liquid and additives in a certain mass ratio;

[0074] S2, freeze-drying the mixed solution to obtain an unreduced graphene oxide roll network material;

[0075] S3, placing the unreduced graphene oxide roll network material in a protective gas atmosphere for a predetermined time at a predetermined temperature to obtain a self-supporting partially reduced or completely reduced graphene oxide roll network material;

[0076] S4. After the self-supporting partially reduced graphene oxide r...

specific Embodiment 1

[0091] Fabrication of self-supporting unreduced graphene oxide rolls with additives using glucose and graphene oxide:

[0092] 1) Take a certain amount of concentrated H 2 SO 4 , graphite powder, NaNO 3 Stir in ice-water bath; then add KMnO 4 and deionized water continued to stir in an ice-water bath, and finally added H 2 o 2 Afterwards, several times of centrifugation and cleaning were performed to obtain a graphene oxide dispersion.

[0093] 2) Dissolve a certain mass of graphene oxide dispersion and glucose in deionized water for ultrasonication, wherein the concentrations of graphene oxide and glucose are both 0.5 mg / mL.

[0094] 3) Inject the above solution into a polytetrafluoroethylene mold, and then immerse the bottom part of the mold in liquid nitrogen to form a temperature gradient difference. The material is prepared using ice crystal template technology. After the solution is completely solidified, put it into a freeze dryer Take it out after drying in mediu...

specific Embodiment 2

[0098] The difference between this embodiment and the specific embodiment example 1 is that fructose is used as an additive, and its concentration is 0.25mg / mL. Finally, a self-supporting graphene oxide roll containing fructose is produced, and the diameter of the graphene roll is about 300nm. Others are the same as the specific embodiment example 1.

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
densityaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a self-supporting reduced graphene oxide roll network material and a preparation method thereof, belonging to the field of nanomaterial research. Its preparation method: configure a mixed solution of graphene oxide dispersion liquid and additive; freeze-dry the mixed solution to obtain unreduced graphene oxide roll network material; place the unreduced graphene oxide roll network material in a protective gas atmosphere to predetermine Temperature treatment for a predetermined time to obtain a self-supporting partially reduced or fully reduced graphene oxide roll network material; after repeated cleaning of the self-supporting partially reduced or fully reduced graphene oxide roll network material to a predetermined degree, perform freeze-drying treatment ; Self-supporting reduced graphene oxide roll network materials with low additive content were obtained. The method has the advantages of simplicity, low cost, large-scale industrial preparation and the like. The fabricated graphene roll material, which has a fully self-supporting structure and has different roll diameters, has a wide range of applications.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a self-supporting reduced graphene oxide roll network material and a preparation method thereof. Background technique [0002] Graphene rolls are one-dimensional structures similar to radially unenclosed carbon nanotubes formed by coils of graphene. This material between graphene and carbon nanotubes not only has high electron mobility and high mechanical strength, but also has unique and excellent electrical and mechanical properties different from the two. This structure not only avoids the problem of easy stacking and agglomeration of graphene sheets, but also maintains its large specific surface area, and compared with carbon nanotubes with a closed structure, the coiled structure of graphene sheets makes it easier to fill and recombine Other materials have a wide range of application values ​​in supercapacitors, lithium batteries and other energy sources. Previ...

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): C01B32/198C01B32/19H01G11/24H01G11/34H01G11/36H01M4/62
CPCC01P2004/03C01P2004/30C01P2004/62H01G11/24H01G11/34H01G11/36H01M4/362H01M4/38H01M4/386H01M4/625H01M4/628H01M10/052H01M10/0525Y02E60/10
Inventor 陈辉亮肖卓建周维亚王艳春解思深
Owner INST OF PHYSICS - CHINESE ACAD OF SCI