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

Method for simply and innoxiously preparing single-layer graphene

A single-layer graphene and graphite technology, applied in the field of inorganic material chemistry, can solve problems such as high cost, long preparation time, and complicated process, and achieve the effects of environmental protection, low manufacturing cost, and simple process

Inactive Publication Date: 2009-10-07
SHANGHAI UNIV
View PDF0 Cites 69 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both the mechanical stripping method and the heating SiC method require ultra-high temperature conditions, the process is complicated, the preparation time is long, and the cost is high.
As an important preparation method, the chemical dispersion method has become an important point to choose a suitable ring-protographed graphite oxide method. The current reduction methods mainly include reduction of hydrazine hydrate and dimethyl hydrazine, etc., but monohydrazine and dimethyl hydrazine are faced with The huge disadvantage of being highly toxic

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
  • Method for simply and innoxiously preparing single-layer graphene
  • Method for simply and innoxiously preparing single-layer graphene
  • Method for simply and innoxiously preparing single-layer graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation process and steps in this embodiment are as follows:

[0016] 1. Preparation of single-layer graphite oxide sheet solution and graphene oxide solid: use natural graphite powder as raw material, get 3 grams of natural graphite powder with a fineness of 325 meshes, add 12 milliliters of concentrated sulfuric acid, 2.5 grams of potassium persulfate and 2.5 grams of Phosphorus pentoxide, uniformly mixed at 80°C, allowed to react for 4.5 hours; the mixture was cooled to room temperature, diluted with deionized water and allowed to stand overnight, then separated by filtration with a cellulose acetate membrane with 0.2 micron pores, and washed with a large amount of Washed with deionized water, the product was left standing overnight at room temperature; the above product, namely pre-oxidized graphite, was stirred and slowly added to a mixed solution of 120 milliliters of cooled concentrated sulfuric acid at 0°C and 15 grams of potassium permanganate. After st...

Embodiment 2

[0019] The preparation process and steps in this example are exactly the same as those in Example 1 above. The difference is: the heating temperature in the reactor is 150°C, the reaction time is 10 hours, and finally the single-layer graphene is produced.

Embodiment 3

[0021] The preparation process and steps in this example are exactly the same as those in Example 1 above. The difference is: the heating temperature in the reactor is 200°C, the reaction time is 16 hours, and finally a single-layer graphene is produced

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

No PUM Login to View More

Abstract

The invention relates to a method for simply and innoxiously preparing single-layer graphene, belonging to the chemical field of inorganic field. The technical processes of the invention are as follows: adopting a fixed amount of natural graphite powder; oxidizing the natural graphite powder in a strong oxidizing condition to obtain the graphite oxide; dispersing the obtained graphite oxide in the de-ionized water; then ultrasonically processing for a certain period in an ultrasonic machine to peel the graphite oxide off into single-layer graphite oxide sheet; then dispersing the graphite oxide sheet in the dimethylsulfoxide solution; transferring the mixture solution to a reaction kettle and reacting for 10 to 16 hours in 150 to 200 degrees centigrade; after filtered, obtaining the mass colour product, that is, single-layer grapheme. The invention adopts nontoxic reducing agent, dimethylsulfoxide, so it is good for environment protection. The invention has simple technique, operation convenience, and low manufacturing cost.

Description

technical field [0001] The invention relates to a simple and non-toxic method for preparing single-layer graphene, which belongs to the field of inorganic material chemistry. Background technique [0002] Since its independent existence was discovered in 2004, graphene, as a new allotrope of carbon, has a special honeycomb two-dimensional structure composed of a single layer of carbon atoms. It not only has a good Mechanical properties, but also unique electrical properties. It is a zero-bandgap semiconductor with unique carrier characteristics and excellent electrical quality, and the electrons in it are like infinite Dirac fermions, Brillouin scattering and ultra-high electron mobility in many respects, compared with silicon The electron mobility of the semiconductor is 100 times higher and 20 times higher than gallium arsenide. Given its so many exotic properties, it has attracted much attention recently and is considered to have great application prospects in a wide ra...

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): C01B31/02
Inventor 曹傲能刘振叶张梅吴明红刘元方
Owner SHANGHAI UNIV
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