What happens when graphene oxide is reduced?

By reducing graphene oxide, these oxidized functional groups are removed, to obtain a graphene material. This graphene material is called reduced graphene oxide, often abbreviated to rGO.

Is reduced graphene oxide conductive?

Graphene oxide, which has C/O ratio of 2/1, is non conductive. It usually has a conductivity of less than a micro S/m. Reducing graphene oxide to C/O ratio above 6 is required to make graphene oxide conductive by partially restoring the aromatic graphene structure.

Is graphene oxide thermally conductive?

At room temperature, the intrinsic thermal conductivity of graphene oxide is around 72 W/(m K) with an oxidation degree of 0.35 and around 670 W/(m K) with an oxidation degree of 0.05.

What is thermally reduced graphene oxide?

Among various methods used for the reduction of graphene oxide (GO) into a purer form of graphene, the thermal reduction method provides a simpler, safer, and economic alternative, compared to other techniques. Thermal reduction of GO causes significant weight loss and volume expansion of the material.

Is reduced graphene oxide more conductive than graphene?

Xiao Fan The only big difference between GO and rGO is the number of oxygen molecules present, hence conductivity. GO in an insulator, while rGO is electrically conductive, but also the conductivity depends on the degree of reduction. Highly reduced rGO is almost a superconductor, just like pure graphene.

Why do we reduce graphene oxide?

Reduced graphene oxide (rGO) has commonly been used to prepare composites with various materials, such as metal and metal oxides, by utilizing different techniques to improve the supercapacitor performance.

What is the thermal conductivity of graphene?

Additionally, graphene is highly thermally conductive, exhibiting a thermal conductivity of ~4000 Wm−1 K−1 [15,16,17].

What is the difference between graphene oxide and reduced graphene oxide?

The key difference between graphene oxide and reduced graphene oxide is that the graphene oxide contains oxygen-containing functional groups whereas the reduced graphene oxide lacks the oxygen-containing functional groups. Graphite oxide is a material that consists of carbon, hydrogen and oxygen atoms.

What happens when graphene oxide is heated?

Article Thermal stability of RGO and RGO/SiO2 nanocomposite prepared… High temperature will cause that the graphene to react with air (oxygen) and decompose.

Is graphene oxide a conductor or insulator?

In contrast, graphene oxide, an oxidized graphene sheet with carboxylic acid at the edges and phenol hydroxyl and epoxide groups on the basal plane, is generally considered to be an insulating material.

Which is better graphene or graphene oxide?

Graphene Oxide is cheaper and easier to manufacture than graphene, and so may enter mass production and use sooner. GO can easily be mixed with different polymers and other materials, and enhance properties of composite materials like tensile strength, elasticity, conductivity and more.