A fundamental study into factors that could affect the voltammetric
measurement of GO colloidal solutionswas first performed,with particular
focus on the concentration of the GO dispersions, pH of the electrolyte,
and the GO particle sizes. Fig. 1 summarises the voltammetric data
obtained. Firstly for the concentration of the GO colloid, we observe in
all cases that no characteristic voltammetric waves were noticeable
with 0.1 mg mL−1 colloidal GO solutions regardless of pH or type
of parent graphite material used. In comparison, distinctive peaks
corresponding to the redox behaviour of GO were observable with
a concentration of 1.0 mg mL−1 under specific conditions, and is
thus the minimum concentration required to perform voltammetry
for both forms of GO investigated.
A fundamental study into factors that could affect the voltammetric
measurement of GO colloidal solutionswas first performed,with particular
focus on the concentration of the GO dispersions, pH of the electrolyte,
and the GO particle sizes. Fig. 1 summarises the voltammetric data
obtained. Firstly for the concentration of the GO colloid, we observe in
all cases that no characteristic voltammetric waves were noticeable
with 0.1 mg mL−1 colloidal GO solutions regardless of pH or type
of parent graphite material used. In comparison, distinctive peaks
corresponding to the redox behaviour of GO were observable with
a concentration of 1.0 mg mL−1 under specific conditions, and is
thus the minimum concentration required to perform voltammetry
for both forms of GO investigated.
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