King Saud University

Amel Laref

Manal Ahmed Gasmelseed Awad

Khalid Mustafa Osman Ortashi

Awatif Ahmed Hendi

Nawal Ahmad Madkhali

Hajar Abdullah Aldakhil

Fatimah Yahya Mohammad Al-Abbas

Lena Jassim

The green synthesis of a reduced graphene oxide (rGO) silica (SiO) nanocomposite usingseed extract includes mixing a quantity of carbon source in an acid solution while stirring to obtain a solution; adding a first oxidant gradually into the solution to oxidize the soot and obtain a first suspension; stirring the first suspension while maintaining a temperature of the suspension to about 35&#xb0; C.; adding plant seeds extract to the first suspension while raising the temperature of the suspension to about 60&#xb0; C.; adding a second oxidant to the suspension to form the reduced graphene oxide nanoparticles; isolating the reduced graphene oxide nanoparticles by centrifugation; suspending the reduced graphene oxide nanoparticles in water; adding a solution comprising tetraethyl orthosilicate (TEOS), concentrated aqueous ammonia solution and a plant seeds extract under ultrasonication; and increasing the temperature to about 90&#xb0; C. to form reduced graphene oxide-silicon dioxide nanocomposite suspension.

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The green synthesis of reduced graphene oxide nanoparticles usingseed extract comprises the steps of mixing a quantity of soot or other carbon source in an acid solution while stirring to obtain a solution; adding a first oxidant gradually into the solution to oxidize the soot and obtain a suspension; stirring the suspension while maintaining the temperature of the suspension at about 35&#xb0; C.; addingseed extract to the suspension while raising the temperature of the suspension to about 60&#xb0; C.; adding hydrogen peroxide to the suspension; and isolating the reduced graphene oxide nanoparticles by centrifugation.

The synthesis of reduced graphene oxide nanoparticles includes the steps of: mixing soot with an acid to obtain a solution; adding a first oxidant gradually into the solution to oxidize the carbon source and obtain a suspension; stirring the suspension while maintaining a temperature of the suspension at about 35&#xb0; C.; raising the temperature of the suspension to about 60&#xb0; C.; adding water into the solution; adding a second oxidant into the suspension while stirring resulting in the oxidation of the carbon source to form the reduced graphene oxide nanoparticles; and isolating the resulting reduced graphene oxide nanoparticles by centrifugation. The acid is preferably an acid mixture including, for example, sulfuric acid (HSO) and phosphoric acid (HPO). The first and second oxidants can be potassium permanganate (KMnO) or hydrogen peroxide (HO).

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Riyadh, Saudi Arabia

Amel Laref