What is graphene oxide ?
Graphene oxide is an oxide of graphene, generally represented by GO, and its color is brownish yellow. Common products on the market include powder, flake and solution. Due to the increase of oxygen-containing functional groups after oxidation, the properties are more active than graphene, and its properties can be improved through various reactions with oxygen-containing functional groups.
What is the structure of graphene oxide?
Graphene oxide, as a single-layer material exfoliated from graphite oxide, can exist stably in aqueous solutions and polar solvents due to the introduction of a large number of oxygen-containing groups on the surface and edges. After oxidation treatment, graphite oxide still maintains the layered structure of graphite, but many oxygen functional groups are introduced into the graphene monolith of each layer. The introduction of these oxygen functional groups makes the single graphene structure very complicated. In view of the status of graphene oxide in the field of graphene materials, many scientists have tried to describe the structure of graphene oxide in detail and accurately in order to facilitate further research on graphene materials, although computer simulations, Raman spectroscopy have been used, The structure of graphene oxide has been analyzed by means of nuclear magnetic resonance, but due to various reasons (different preparation methods, differences in experimental conditions and different sources of graphite have certain influence on the structure of graphene oxide), the precise structure of graphene oxide cannot be get ok. [2] The generally accepted structural model is that hydroxyl and epoxy groups are randomly distributed on the graphene oxide monolith, while carboxyl and carbonyl groups are introduced at the edge of the monolith. Recent theoretical analysis shows that the surface functional groups of graphene oxide are not randomly distributed but highly correlated.
What is the technology of graphene oxide?
Graphene oxide is generally obtained by oxidation of graphite by strong acid. There are three main methods for preparing graphite oxide: Brodie method, Staudenmaier method and Hummers method. Among them, the preparation process of Hummers method has relatively good timeliness and safety in the preparation process, and is the most commonly used one. It uses potassium permanganate in concentrated sulfuric acid and graphite powder to undergo oxidation reaction to obtain brown graphite flakes with derived carboxylic acid groups on the edge and mainly phenolic hydroxyl groups and epoxy groups on the plane. The graphite flake layer can be The graphene oxide is exfoliated by ultrasonic or high shear vigorous stirring, and a stable, light brown-yellow single-layer graphene oxide suspension is formed in water. Graphene oxide flakes have insulating properties due to the severe functionalization of the conjugated network. Partial reduction can be carried out after reduction treatment to obtain chemically modified graphene flakes. Although the resulting graphene product or reduced graphene oxide has more defects, which make it less conductive than the original graphene, this oxidation-exfoliation-reduction process can effectively make insoluble graphite powder in water. DEK Process provides a way to make reduced graphene oxide. Moreover, its simple process and its solution processability make it an attractive process for manufacturing graphene-related materials and components in the industrial process considering mass production.
High quality graphene oxide supplier
Luoyang Moon & Star New Energy Technology Co., LTD, founded on October 17, 2008, is a high-tech enterprise committed to the research and development, production, processing, sales and technical services of lithium ion battery anode materials. After more than 10 years of development, the company has gradually developed into a diversified product structure with natural graphite, artificial graphite, composite graphite, intermediate phase and other negative materials (silicon carbon materials, etc.). The products are widely used in high-end lithium ion digital, power and energy storage batteries.If you are looking for Lithium battery anode material,click on the needed products and send us an inquiry：sales@graphite-corp.com
