carbon graphite Research Grade Graphene Oxide Powder

Product Description：

Graphene oxide is the oxide of graphene, generally denoted by GO, the color is brownish-yellow, firstly prepared by the improved Hummers method to get the slurry, and then freeze-dried to get the high-quality graphene oxide powder.GO not only contains SP2 hybridized carbon atoms, part of the carbon-carbon double bond is interrupted by the oxygen-containing functional groups, which becomes the SP3 hybridization; the surface of graphene oxide contains a large number of functional groups, such as -OH, -COOH, -O-, etc. These functional groups give graphene oxide some new properties, such as good dispersion, hydrophilicity, increased interaction with polymers and so on.

Graphene oxide powder Transmission electron microscope picture

Product Advantage:

1、Using vacuum freeze-drying, higher yield than spray-drying, and the form remains intact;

2、Good re-dispersibility, about 30min ultrasonic processing can be restored to the original sol form, to get a stable dispersion

3, Graphene oxide-based materials provide surface modification active sites and large specific surface area;

4, Good dispersion in composite materials, in situ polymerization to prepare multifunctional composite materials, less agglomeration;

5, High purity, less metal impurities;

6、Oxidation degree is adjustable and can be customized according to customer's demand;

Technical Specification:

Product Name：Graphene oxide powder

Product Model:SY-GO-S;

Brand：SmartCmeta

Abbreviation: GO

Preparation method: chemical oxidation

Raw material: natural flake graphite

Product Specification: 5g/bottle

Place of origin: Beijing, Xiamen

Price：Cheaper in a bulk order

Customization：Customization is acceptable

Areas of application:

1, Textile field: Graphene materials and ordinary textiles’ effective combination, can make the textile retain their own performance ,meanwhile access to graphene’ one or several special properties, such as conductive, flame-retardant, antibacterial, anti-ultraviolet ray, anti-electromagnetic radiation, magnetic therapy, anionic health care, etc., can be applied in the field of special protection, smart fabrics and so on;

2, Graphene photocatalytic materials: Graphene/titanium dioxide photocatalytic materials in the visible light or ultraviolet light has a strong reducing ability, stable chemical properties, can be formaldehyde, toluene, xylene, ammonia, odor, bacteria, microorganisms, and other harmful organic matter completely decomposed into carbon dioxide and water. Graphene/titanium dioxide photocatalytic material can be applied to various photocatalytic sprays for air pollution treatment, such as applied to indoor air purification, formaldehyde removal, outdoor environment air purification, etc.; nano antimicrobial coatings; wastewater treatment, such as decomposition of organic matter in wastewater from paper mills, dyeing and printing factories, and chemical plants. The application prospect is broad.

3, Construction materials: Graphene construction materials are formed by using graphene as the core and compositing with other materials through its high strength and strain hardening properties. The characteristics of graphene flakes can be utilized to strengthen the thermal conductivity and strength of the material, while effectively reducing the density of the material. Usually in the concrete material to increase a strength level, a single square of concrete need to increase 30kg cement, if mixed with graphene, then to achieve the same strength level, can save cement about 10%. The advantages are high strength, good thermal conductivity, good emissivity and oxidation resistance.In 2018, a hospital in London, UK, applied a roof built with graphene material. This roof utilizes special 3D printing and steel structure, and through the high thermal conductivity of graphene material, the temperature inside the hospital will be drastically reduced in the summer, saving the hospital's air conditioning energy consumption.

4, Graphene anti-corrosion coatings: Graphene material in the sheet diameter is very small can still maintain a great diameter-thickness ratio, add a small amount of graphene in the coating on the line to effectively form a lap, the formation of a more complete shielding layer, delay the penetration of corrosive media, greatly reducing the permeability of chloride ions. Some practical applications show that when the amount of GO added is 0.5%, the chloride ion permeability of the coating can be reduced by 50%. On the other hand, the use of graphene's high conductivity, add a very small amount of zinc powder coating (<0.3%), the coating and zinc powder can form a conductive network, improve the utilization of zinc powder, so that the entire coating relative to the steel to become the "anode", and significantly improve the cathodic protection performance of the zinc powder primer.

5. Graphene lubricant: Traditional lubricant additives usually contain sulfur, phosphorus, chlorine and other elements, to bring greater harm to the environment, in order to create a green and efficient lubricant products, graphene has become the ideal choice, graphene lubrication and anti-wear performance is very excellent, when the number of layers of 2 ~ 3 layers, its friction is not zero but almost zero. Graphene lubricant can change the friction between the metal rotating parts into sliding between the layers of graphene sheets, and at the same time, it can also fill and repair the uneven pits on the metal surface to meet the dual needs of anti-wear and drag reduction, and prolong the service life of the engine. At the same time, based on graphene's antioxidant and anti-volatility, graphene lubricant can also save fuel and reduce carbon emissions, which is conducive to environmental protection. Currently several categories of graphene materials can achieve the effect of lubrication, but considering the problem of dispersion, the dispersion of graphene oxide is more advantageous.

Frequently Asked Questions

Q: What is graphene oxide?

A: Graphene oxide (GO) is a two-dimensional material in which oxygen-containing functional groups are introduced into the graphene skeleton. The introduction of oxygen-containing functional groups, on the one hand, destroys the ideal π-electron conjugated structure of graphene, changing it from a conductor to an insulator. On the other hand, these functional groups also confer functions such as hydrophilicity, so that graphene oxide can form stable colloids in water and some low molecular weight alcohols. Using these chemically active functional groups, covalent bonding of graphene oxide with other materials can also be realized.

Q: What types of graphene materials are there?

A: According to the different preparation processes, graphene materials can be divided into two categories: graphene oxide and graphene, and graphene can be divided into graphene microchip prepared by physical method, usually denoted by Gr, and reduced graphene oxide prepared by redox method, usually denoted by rGO, according to the different preparation processes.

Q: What are the different conditions of use for these three types of graphene products?

A: GO has better hydrophilicity and can be stably dispersed in water without adding any additives, but some lattice defects are introduced in the process of oxidative intercalation, so GO is almost non-conductive; Gr has a complete lattice and better electrical conductivity, but Gr is highly hydrophobic and extremely difficult to be dispersed without dispersing additives and the number of layers is higher than that of graphene oxide; rGO has electrical conductivity and dispersibility between GO and Gr, and the use of rGO is different. The conductivity and dispersibility of rGO is between GO and Gr, and it is necessary to add appropriate amount of dispersing additives in the process of using.