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Graphene Oxide | ACS Material

Graphene Oxide | ACS Material
Graphene Oxide | ACS Material

By ACS MATERIAL LLC

Commercializing graphene has been a main interest in research and technology, but its high cost and some difficulty in producing large quantities of the material remains to be a topic of discussion. However, graphene oxide is exceptionally feasible in creating a scalable production; in fact, it has been an attractive precursor material for a large-scale production of graphene-based materials.   Here, we discuss more about graphene oxide, its synthesis and how it can be an excellent material for various applications.

Introduction to Graphene Oxide

Graphene is a two-dimensional, crystalline allotrope with a hexagonal lattice structure made from pure carbon atoms.  They are best known for its unique properties containing high optical transparency, the best heat conductivity at room temperature and the ability to be flexible all within a strong, nano-sized material. Graphene was first discovered by the mechanical exfoliation of 3D graphite crystals and peeling away a single layer of graphene with Scotch tape. Since then, graphene has gained recognition for its attributes and different methods have been tested to find the best way to produce large-scale amounts with low costs but it is still challenging to manufacture with these specifications.

Graphene oxide (GO) happens to be a great precursor to obtaining graphene with higher yields and lower costs. To obtain GO, graphite oxide is first produced by utilizing graphite crystals that have been oxidized with strong oxidizing agents, such as sulfuric acid.  Through sonication, graphite adopts oxygen-containing functional groups that allow the material to be dispersible in water while increasing interlayer distance.1 Then, graphite oxide can be exfoliated into either single or multilayers of oxygen-functionalized graphene oxide (GO). The difference between graphite oxide and GO are based on their different structures but chemical composition remains alike. GO is a single-layered material made of carbon, hydrogen and oxygen molecules, which ultimately becomes inexpensive yet abundant.2 However, due to the disruption of its sp2 hybridization, GO tends to be described as an electrical insulator rather than a conductor. To counteract this disruption, GO can be reduced to form reduced graphene oxide (rGO) to retrieve its hexagonal lattice structure and produce graphene-like sheets by removing a large portion of oxygen groups to closely resemble graphene…

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