Chemicals successfully used for GO reduction are primarily
hydrazine and its derivatives (see e.g. [30,40,49,56,57].
Hydrazine does not reduce hydroxyl groups at the edges of
nano-sheets. For liquid phase reduction,reduced nano-
sheets at some stage start to form strong aggregates which
then can even resist ultrasound. To avoid aggregation one
can introduce surfactants into the solution.
As from the chemical viewpoint GO is an acid,its
reducers can bevarious compounds (from alkali [58] to
vitamin C [59]) having lower acidity than that of GO.
Orthodox chemists find many reasons to discuss the advan-
tages and drawbacks of various reducers, because rGO