Graphene oxide is a versatile solid supporting material to immobilize metal nanoparticles capable of catalyzing a wide array of organic transformations. Similarly, this study describes about the synthesis of hybrid nanomaterial comprised of titanium dioxide core - graphene oxide shell (TiO2@GO) decorated with metal nanoparticles. We examined the effectiveness of supporting material to increase the stability, catalytic activity and recyclability of the nanoparticles. The novel catalytic system opens door for investigating novel reactivity. To investigate furthermore, we made material with various combinations of GO while keeping TiO2 core shell remains intact. For instance, we synthesized TiO2 spheres and modified their surface to positive charges in order to wrap negatively charged GO. In addition, we employed TiO2@GO core shell as templates for the nucleation and growth of metal nanoparticles over their surface exemplified by Au NPs. Also, We synthesized thiol functionalized GO shell from normal GO shell in order to immobilize Au NPs much more. We expect the metal nanoparticles immobilized on hybrid nanomaterials would be a pioneer catalytic system in a variety of organic reactions such as reduction of 4-nitrophenol. The study on photocatalysis and photovoltaics of these materials are underway.

Immobilized Au on TiO<sub>2</sub>@GO core - shell nanometarial catalyzed reduction of 4-nitrophenol

248th National Meeting (2014)

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Immobilized Au on TiO2@GO core - shell nanometarial catalyzed reduction of 4-nitrophenol

Immobilized Au on TiO₂@GO core - shell nanometarial catalyzed reduction of 4-nitrophenol