Reduced graphene oxide (RGO) wrapped titanium dioxide nanocrystals (TiO2 NCs@RGO) with oxygen vacancies (Vo) and Ti3+ defects have been synthesized by electrostatically wrapping GO around TiO2NCs followed by thermal annealing at 400 C.Transmission electron microscope observations have shown that TiO2 NCs@RGO has a unique crystalline core/crystalline shell structure, which is different from the original amorphous TiO2 covered TiO2 NCs. The enhanced photocatalytic performance can be attributed to the improved charge separation at the interface of TiO2 NCs and RGO layer and the enhanced optical absorption in visible light region due to the donor levels of the defects such as Vo-Ti3+ species. This work establishes a new method for preparing Vo defect contained TiO2 catalysts.

Graphene wrapped TiO<sub>2</sub> based catalysts with enhanced photocatalytic activity

248th National Meeting (2014)

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Graphene wrapped TiO2 based catalysts with enhanced photocatalytic activity

Graphene wrapped TiO₂ based catalysts with enhanced photocatalytic activity