Modified hummer method or LPE in aqueous medium for graphene preparation need to be dried in Vacuum oven rather than binder ovens. Is there a significant reason for this vacuum drying?
Depends what you want to achieve:
Wet graphene preparations are dried in a vacuum instead of in the air to keep them from oxidizing, getting contaminated, and getting rid of solvents quickly. Oxidation is less likely to happen in a vacuum because there is little to no oxygen present. This helps keep the graphene's original characteristics. Vacuum drying also keeps things clean by lowering the boiling points of liquids and preventing contamination from particles in the air. This makes the drying process more complete and faster. This method helps maintain the structural integrity and performance characteristics of the graphene, which can be compromised by atmospheric drying.
Jürgen Weippert
what if I have exfoliated graphite in a dispersing medium, Can atmospheric thermal drying reaggreagate the exfoliated graphite or I can get a graphene powder?
Abhishek Kumar
so could mild heating in nitrogen atmosphere give the same results of vacuum drying ?
I would assume that in this scenario you surely wouldn't get crystalline graphite back, but if the layers get a chance to stack somehow, they'll surely do so because it's energetically favorable, so the graphene flakes will not be fully separated.
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