Three-Dimensional Graphene–TiO₂ Nanocomposite Photocatalyst Synthesized by Covalent Attachment

摘要

We report the synthesis of a three-dimensional graphene (3DG)–TiO_(2) nanocomposite by covalently attaching P25 TiO_(2) nanoparticles onto pristine 3DG through a perfluorophenyl azide-mediated coupling reaction. The TiO_(2) nanoparticles were robustly attached on the 3DG surface, with minimal particle agglomeration. In photocatalytic CO_(2) reduction, the 3DG–TiO_(2) nanocomposite demonstrated excellent activity, about 11 times higher than that of the P25 TiO_(2) nanoparticles. The enhanced activity can be partially attributed to the highly dispersed state of the P25 TiO_(2) nanoparticles on the 3DG substrate. This 3DG-based system offers a new platform for fabricating photocatalytic materials with enhanced activities.