In this study, TiO2 nanotubes (TNTs)/hydrothermally treated graphene oxide (hGO) composites were prepared by decorating graphene oxide layers with commercially available TiO2 nanoparticles (P90) followed by hydrothermal synthesis anchors small diameter (~9 nm) TNTs on to the hGO surface for the first time. The hydrothermal treatment used to synthesis TNTs simultaneously converts GO to de-oxygenated GO. The deoxygenated hGO is ~70% graphene. The graphene nature of hGO in the composites was confirmed by XRD, Raman, FTIR and XPS. Photocatalytic performance of the hGO-TNT composites was evaluated for the photodegradation of malachite green. The hGO-TNT composite with 10% addition of GO during the synthesis exhibits the highest photocatalytic activity. The synthesis of �high surface area-small diameter� TiO2 nanotubes and simultaneous conversion of GO to partially reduced GO (hGO) �without using strong reducing agents� represent two advantages in carbon based TiO2 composite photocatalysts.

Graphene-TiO<sub>2</sub> nanotube composites as advanced photocatalytic hybrid materials

243rd National Meeting (2012)

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Graphene-TiO2 nanotube composites as advanced photocatalytic hybrid materials

Graphene-TiO₂ nanotube composites as advanced photocatalytic hybrid materials