Product Description:

Reduced Graphene Oxide Powder (with chemical reduction process)

Graphene material produced starting from GO with chemical reduction process to removal the oxygen-containing functional groups, will be called reduced graphene oxide (rGO). The rGO powder is obtained by vacuum freeze-dried process. In some applications, GO to rGO’s reduction is done during the material composite process.First, using GO's good surface wettability for dispersion, then in-situ reduction is carried out to achieve the composite of different materials. RGO’s surface defect site is relatively lesser than GO and it is more close to single-layer graphene in structure and property.

 

Product advantages：

1.Different reduction processes will cause different reduction degrees.According to different applications, different reducing agents will be used to reduce graphene oxide.

2. RGO powder(with chemical reduction process) still keep a little oxygen-containing functional groups,the properties are more active then graphene produced by physical method, will be more easier to graft modification then composite with other materials.

3. As an adsorption material, rGO powder keep a little oxygen-containing functional groups, the adsorption of heavy metals and organic dyes has a very obvious effect

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

5. high purity, less metal impurities;

 

Technical Specification:

layers	Tap Density(g/cm3)	specific surface area（m2/g）	Carbon Content(%)	Oxygen Content	particle size (D50=μm)	state
1~5	＜0.02	350~450	85~90	8~13	＜5μm	powder

 

Product name:Reduced graphene oxide powder(with chemical reduction process)

Product Mode:SY-rGO-S

Brand：SmartCmeta

Abbreviation: rGO

Preparation method: chemical reduction process

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’s effective combination, can make the textile retain their own performance ,meanwhile access to graphene’s 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.According to 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.

6.The field of health: Graphene inherent properties determine that it can produce a wavelength of 5 ~ 15μm range of far-infrared radiation energy, and 4 ~ 15μm of far-infrared light is essential for the survival of plants and animals, "the light of life", biological tissues, cells and molecules of the chemical bond vibration, resonance wavelengths are located in most of the 4 ~ 15μm wavelength band. Most of the resonance wavelengths are located in the 4~15μm band when the chemical bonding of biological tissues and cells vibrate, which is basically coincident with the far infrared rays radiated by graphene, thus producing "resonance absorption". Far infrared rays have a strong penetrating ability, not only to the surface of the object, but also can be transported to the object inside the heat, absorbed by the human body can penetrate the skin 3 ~ 5nm, is the temperature of the deep skin rises, to promote blood circulation, and play a role in health care.

 

Frequently Asked Questions:

Q: What is reduced graphene oxide powder(with chemical reduction process)?

A: rGO is produced by GO after reduction.The chemical reduction process produced rGO powder compare with physical method produced graphene nanoplatelets, still keep two defects: one is residual oxygen-containing functional groups,hydroxyl and carboxyl groups can be effectively reduced, but carbonyl groups are difficult to be reduced; the other one is the hole, during the process of rGO powder,the oxidation and washing stage will lead to the loss of carbon skeleton and the formation of holes in the lamellar layer, which can not be repaired during reduction.

 

 

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 nanoplatelets prepared by physical method, usually denoted by GNP, and reduced graphene oxide prepared by chemical reduction process, 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; GNP has a complete lattice and better electrical conductivity, but GNP is highly hydrophobic and extremely difficult to be dispersed without dispersing additives and the number of layers is higher than that of graphene oxide.The conductivity and dispersibility of rGO is between GO and GNP, and it is necessary to add appropriate amount of dispersing additives in the process of using.

 

 

Q:How to disperse the graphene powder?

A:Through simple ultrasonic treatment, the rGO powder can be dispersed in agents  such as water, ethanol, acetic acid, DMF, NMP, etc

 

 

Q:How to do if graphene powder dispersion effect is not so good?

A:A small amount of sodium cholate surfactant can be added to the dispersion system to reduce the surface tension of graphene and enhance its dispersion effect

 

 

Q: What is the particle size of rGO?

A: At present, the particle size of our rGO with chemical reduction process is less than 5μm, the physical method produced graphene nanoplatelet is 7~12μm , please contact us for customization if you need other size.

 

 

Q:How to store graphene powder?

A: It is recommended to keep it in ventilated, cool and dry environment, and store it separately from strong oxidizers and flammable materials. Long time storage will lead to powder absorb moisture easily, which can be dried in low temperature before use.