Few
layer graphene was synthesized using rice husk ash (RHA) and potassium
hydroxide (KOH). This methodology demonstrates the utility of RHA as carbon
source for graphene synthesis and as a protective barrier against oxidation of
parent rice husk and KOH mixture. Oxidation may occur during synthesis process
due to high temperature annealing of RHA and KOH mixture. Electrochemical
characterization showed decent capacitance value 86 F·g-1 at
500 mV·s-1.
XRD and Raman spectroscopy analysis confirmed the presence of graphitic
structure. Transmission electron microscopy visually confirmed presence of few
layer graphene. Novelty of this synthesis technique can be described as one-pot,
one chemical synthesis technique. Use of natural precursor makes this technique
highly cost effective for large scale production.
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