| Anotace: |
A practical approach to bulk-scale graphene-based materials is critically important for
their use in the industrial applications. Here, we describe a facile method to prepare graphite
oxide (GO) using a Couette–Taylor flow reactor for the oxidation of bulk graphite flakes.
We found that the turbulent Couette–Taylor flow in the reactor could be engineered to
result in the efficient mixing and mass transfer of graphite and oxidizing agents (KMnO4
and H2SO4), thereby improving the efficiency of graphite into GO. As compared to the standard
Hummers’ method, higher fraction of a single- and few-layer graphene oxide (G-O)
can be yielded in a dramatically shortened reaction time, by optimizing the processing
parameters, we have shown that 93% of G-O yield could be achieved within 60 min of
reaction time. This method also allowed for the in-situ functionalization of G-O with metal
oxide nanoparticles to give a nanoparticle-decorated G-O hybrid material. Our method for
facile and large-scale production of graphite oxide may find utility in a range of applications
including energy storage, composites and supporting frameworks of catalyst.
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