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Photocatalytic reduction of carbon dioxide (CO 2 ) to hydrocarbons by using nanostructured materials activated by solar energy is a promising approach to recycling CO 2 as a fuel feedstock. CO 2 photoreduction, however, suffers from low efficiency mainly due to the inherent drawback of fast electron-hole recombination in photocatalysts. This work reports the synthesis of nanostructured composites of titania (TiO 2 ) nanoparticles (NPs) encapsulated by reduced graphene oxide (rGO) nanosheets via an aerosol approach. The role of synthesis temperature and TiO 2 /GO ratio in CO 2 photoreduction was investigated. As-prepared nanocomposites demonstrated enhanced CO 2 conversion performance as compared with that of pristine TiO 2 NPs due to the strong electron trapping capability of the rGO nanosheets.

Nanostructured Graphene-Titanium Dioxide Composites Synthesized by a Single-Step Aerosol Process for Photoreduction of Carbon Dioxide