Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of preparation method of electronegative monolayer graphene

A single-layer graphene, negatively charged technology, applied in the field of preparation of negatively charged single-layered graphene, can solve the problems of high toxicity of organic solvents, poor biocompatibility, high price, etc., and achieves a simple method, low cost, and easy promotion. Effect

Active Publication Date: 2017-07-21
天之草空间科技有限公司
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic solvents are highly toxic, expensive, difficult to separate, and poor in biocompatibility, etc.

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 electronegative monolayer graphene
  • A kind of preparation method of electronegative monolayer graphene
  • A kind of preparation method of electronegative monolayer graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Preparation of low carbon to oxygen ratio graphene quantum dot solution

[0036] Using 1,3,6-trinitropyrene as a carbon source, 1,3,6-trinitropyrene was synthesized by hydrothermal method after ultrasonication in sodium hydroxide solution. Among them, the concentration of 1,3,6-trinitropyrene is 5.0 mg / mL, the concentration of sodium hydroxide solution is 0.3 mol / L, the ultrasonic time is 4 hours, the hydrothermal synthesis conditions are 200 ° C, 4 hours, the solution volume Account for 40% of the volume of the hydrothermal kettle. The graphene quantum dot solution is the solution obtained by hydrothermal synthesis. First, it is fully dialyzed with a dialysis bag with a molecular weight cut-off of 1000 Da, and then the solution in the dialysis bag is collected. Elemental analysis and characterization showed that the carbon and oxygen atomic content ratio was 1.5:1.

[0037] 2. Preparation of single-layer graphene

[0038] Graphite with a particle size of 80 mesh ...

Embodiment 2

[0052] 1. Preparation of low carbon to oxygen ratio graphene quantum dot solution

[0053] Using 1,3,6-trinitropyrene as a carbon source, 1,3,6-trinitropyrene was synthesized by hydrothermal method after ultrasonication in sodium hydroxide solution. Among them, the concentration of 1,3,6-trinitropyrene is 1.0 mg / mL, the concentration of sodium hydroxide solution is 0.5 mol / L, the ultrasonic time is 3 hours, the hydrothermal synthesis conditions are 180°C and 8 hours, the solution volume Account for 30% of the volume of the hydrothermal kettle. The graphene quantum dot solution is obtained by hydrothermal synthesis, after fully dialysis with a dialysis bag with a molecular weight cut-off of 1000Da, the solution in the dialysis bag is collected, and then the gained solution is placed in a 3500Da dialysis bag for sufficient dialysis, and then freeze-dried . Elemental analysis and characterization show that the ratio of carbon and oxygen atoms is 1.2:1.

[0054] 2. Preparation ...

Embodiment 3

[0061] 1. Preparation of low carbon to oxygen ratio graphene quantum dot solution

[0062] Using 1,3,6-trinitropyrene as a carbon source, 1,3,6-trinitropyrene was synthesized by hydrothermal method after ultrasonication in sodium hydroxide solution. Among them, the concentration of 1,3,6-trinitropyrene is 3.0 mg / mL, the concentration of sodium hydroxide solution is 1.0 mol / L, the ultrasonic time is 4 hours, the hydrothermal synthesis conditions are 190°C and 6 hours, the solution volume Account for 25% of the volume of the hydrothermal kettle. The graphene quantum dot solution is obtained by hydrothermal synthesis, after fully dialysis with a dialysis bag with a molecular weight cut-off of 1000Da, the solution in the dialysis bag is collected, and then the gained solution is placed in a 3500Da dialysis bag for sufficient dialysis, and then freeze-dried . Elemental analysis and characterization showed that the carbon and oxygen atomic content ratio was 1.8:1.

[0063] 2. Pre...

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
particle size (mesh)aaaaaaaaaa
concentrationaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of electronegative monolayer graphene. In the preparation method, graphite is taken as a raw material, water is taken as a dispersant, exfoliation of graphite is realized under assist of graphene quantum dot via mechanical exfoliation so as to obtain the electronegative monolayer graphene, wherein the carbon / hydrogen ratio of the graphene quantum dot ranges from 1.2:1 to 1.8:1. The electronegative monolayer graphene prepared via the above preparation method possesses a single layer structure and excellent electrical conductivity, and excellent water dispersibility at a pH value ranging from 2 to 12, and is negatively charged; the preparation method is simple, and is convenient to popularize; and cost is low.

Description

technical field [0001] The invention belongs to the technical field of new materials, in particular to a method for preparing negatively charged single-layer graphene. Background technique [0002] Graphene (single-layer graphene, graphene) is a new type of carbon material, produced by sp 2 The hybridized carbon atoms are bonded in a hexagonal lattice with a single-layer, two-dimensional honeycomb crystal structure. When the graphite sheet is peeled off into a single layer, the single layer with a thickness of only one carbon atom is graphene. Although some researchers currently refer to graphite flakes with less than 10 layers as graphene, in a strict sense, graphene is "a carbon flake with only one layer of carbon atoms thick", that is, single-layer graphene. Single-layer graphene has excellent electrical and optical properties, mechanical properties, thermal conductivity and extremely high charge carrier mobility, as well as excellent mechanical strength and flexibility...

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): C01B32/19
CPCC01B2204/02C01B2204/22C01P2002/84C01P2004/01C01P2004/04C01P2006/40C01P2006/60
Inventor 奚凤娜沈超许枭然周璘
Owner 天之草空间科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com