The
most common and widely used method is Hummer’s method for making
graphene oxide. Graphene oxide (GO) is also sometimes called graphitic
acid. For graphene oxide preparation, 3 g of graphite and 18 g of
KMnO4 with a 9:1 ratio of H2SO4 to
H3PO4 was mixed and the final volume was made
up to 400 mL. After 12 h of continuous stirring at a temperature of
50 °C, the reaction mixture was poured into 400 mL of ice by
making an ice bath. After the mixture was cooled while being continuously
stirred by a glass rod, it was treated with H2O2 having a quantity of 3 mL for precipitated GO. The mixture of GO
was washed with hydrochloric acid (HCl) (5%), deionized water, and
ethanol before filtration. Finally, GO solution was obtained and centrifuged
for additional purification and graphene oxide sheets preparation.34 (link)
most common and widely used method is Hummer’s method for making
graphene oxide. Graphene oxide (GO) is also sometimes called graphitic
acid. For graphene oxide preparation, 3 g of graphite and 18 g of
KMnO4 with a 9:1 ratio of H2SO4 to
H3PO4 was mixed and the final volume was made
up to 400 mL. After 12 h of continuous stirring at a temperature of
50 °C, the reaction mixture was poured into 400 mL of ice by
making an ice bath. After the mixture was cooled while being continuously
stirred by a glass rod, it was treated with H2O2 having a quantity of 3 mL for precipitated GO. The mixture of GO
was washed with hydrochloric acid (HCl) (5%), deionized water, and
ethanol before filtration. Finally, GO solution was obtained and centrifuged
for additional purification and graphene oxide sheets preparation.34 (link)
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