There are exceedingly plenty number of methods to make graphene oxide now however, I'm not exactly experience enough to know which is ideal. I want to know what is the best method is for making large graphene oxide membranes. The goal is to have a surface area of square meter.
Dear Anand Kumar Singh,
A large area of solution processed graphene oxides is the way to go for it. You could either bar-coating, spray-coating or any large area printing techniques. You could find a lot references to do that. The simple way in the laboratory scale is to use a manually spray-gun with a small nozzle (0.2micrometer). Hope it helps.
Best wishes
Xuhua
Hi, Graphene oxide is, in fact, the base plate of graphite with mixed agents from epoxy and hydroxyl groups, as well as carbonyl and carboxyl groups at the edges, the presence of which leads to the hydrophilicity of the graphene oxide structure. Graphene oxide is an electronegative dissipator, and the presence of oxygenated groups makes it thermally unstable. I heard something about Hummer's method: Graphene oxide synthesis is chemically performed by the Hummer's method or the improved Hummer's method. In this method, graphite plates are first expanded and converted to graphite oxide in the presence of concentrated acids and strong oxidizing agents. This process is accompanied by an increase in the distance between the accompanying layers, which, of course, depends on the amount of oxidation and flooding. The large distance between the layers allows water molecules to penetrate the space, leading to a proper distribution of graphene oxide plates in the aqueous medium. Of course, chemical methods.
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