High-quality and large-size two-dimensional material and preparation method thereof

A two-dimensional material, large-scale technology, applied in the field of high-quality large-scale two-dimensional materials and their preparation, can solve the problems of failing to meet the basic requirements of industrial commercial products, low single-layer yield, low total peeling rate, etc. Achieve the effect of industrialization promotion and application, simple technology, easy industrialization promotion and application

Active Publication Date: 2018-11-13
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
View PDF14 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In short, there are still some problems in the preparation of two-dimensional materials by the existing liquid phase exfoliation technology, such as the wide distribution of the thickness (up to 10 layers) and the plane size (tens of nanometers to several microns) of the two-dimensional materials prepared by liquid phase exfoliation; Low monolayer yield (≤10%, except for electrochemical stripping technology based on lithium ion intercalation); low total stripping rate (≤17%, Coleman JNetal. Advanced Materials, 2011, 23, 3944-3948.); Thin The size of nanosheets is often small; some reagents are toxic, flammable and explosive, etc.
These problems lead to the fact that the existing two-dimensional materials are far from meeting the basic requirements of industrial and commercial products (low cost, high quality, high yield, safe and green)

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
  • High-quality and large-size two-dimensional material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] like figure 1 , a preferred embodiment of the present invention discloses a method for preparing a high-quality large-size two-dimensional material, comprising the following steps:

[0035] S1: Disperse the layered structure material powder into the chemical liquid after pretreatment to obtain the dispersion liquid;

[0036] Among them, the layered structure material powder is specifically a three-dimensional layered structure material. The three-dimensional layered structure material refers to a strong covalent bond or an ionic bond within the layer, and the layers are stacked together by weak van der Waals force. New materials, including but not limited to: graphite, expanded graphite, hexagonal boron nitride (h-BN), transition metal dichalcogenides (TMDs), transition metal oxides (TMOs), MAX (M is early transition metal, A It is the third or fourth main group element, X is C, N, Zr, Hf; such as Ti 3 AlC 2 、Cr 3 AlC 2 、Ti 2 SiC, Ti 2 AlN, Ta 4 AlC 3 , (Ti 0....

Embodiment approach 1

[0052] This embodiment specifically includes the following steps: take 40g of natural flake graphite powder with an average particle size of 10 μm and 1.5L N-methylpyrrolidone (NMP) and mix them in a stainless steel tank; feed argon gas and bubble for 30 minutes; set emulsification and dispersion machine (IKA Magic LAB, Germany) with a rotor-stator gap of 0.2mm, a speed of 5000rpm, and a working time of 2 hours. Turn on the equipment to peel off the graphite powder; set the speed of the centrifuge to 3000rpm, and the centrifugation time to 30min. The slurry is centrifuged; the upper layer liquid is taken and vacuum-dried at 100° C. for 24 hours to obtain graphene.

Embodiment approach 2

[0054] This embodiment specifically includes the following steps: take 40 g of natural flake graphite powder with an average particle size of 10 μm, 1.5 L of dimethyl sulfoxide (DMSO) and 45 g of sodium hydride and mix them in a stainless steel tank; feed argon gas and bubble for 30 minutes ; Turn on the emulsification disperser (PUC Colloid Mills, Japan), and peel off the graphite powder for 2 hours; Set the centrifuge speed to 3500rpm, and the centrifugation time is 30min, and turn on the equipment to centrifuge the peeled slurry; Get the upper layer of liquid at 100 It can be vacuum-dried at ℃ for 24 hours to obtain high-quality graphene with an average size larger than 1 μm.

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 sizeaaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a high-quality and large-size two-dimensional material and a preparation method thereof. The preparation method of the high-quality and large-size two-dimensional material comprises the following steps: S1, after pre-treating lamellar structure material powder, dispersing in chemical drug liquid, so as to obtain a dispersion solution; S2, putting the dispersion solution into emulsifying and dispersing equipment, and carrying out chemical and shearing peeling on the lamellar structure material powder under the action of the chemical drug liquid and emulsification and dispersion; S3, carrying out centrifugal separation and vacuum drying to obtain the high-quality and large-size two-dimensional material. The high-quality and large-size two-dimensional material and thepreparation method thereof, provided by the invention, have the advantages of simplicity and rapidness, high peeling efficiency and capability of realizing continuous scale production.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a high-quality and large-size two-dimensional material and a preparation method thereof. Background technique [0002] Two-dimensional materials represented by graphene and graphene-like molybdenum sulfide (materials that maintain a nanoscale in one dimension and electrons can only move freely in the other two non-nanoscales) are due to their unique electronic structure and force, light , electrical, magnetic, thermal and other properties, and has great application potential in many fields such as energy storage / conversion, photoelectric detection, electronics, catalysis, and biology. The preparation technologies of two-dimensional materials can be summarized into two types: chemical vapor deposition, epitaxial growth, and hydrothermal synthesis technology based on bottom-up concepts, and micromechanical exfoliation and liquid phase exfoliation technologies based on top-dow...

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 Applications(China)
IPC IPC(8): C01B32/19C01G39/06C01B19/04C01B32/921C01B21/064B82Y40/00
CPCB82Y40/00C01B19/007C01B21/0648C01B32/19C01B32/921C01B2204/32C01G39/06C01P2004/24C01P2004/61
Inventor 杨诚梁斌刘康伟
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA 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