Résumé
Reduced graphene oxide (rGO)/titanium dioxide (TiO2) composite nanofibers as photocatalytic materials weresuccessfully elaborated by using electrospinning. The as-spun nanofibers with controlled ratio of rGO were annealed at 500°Cunder nitrogen in a tubular furnace. Structural, morphological, and optical characterizations demonstrate the success of rGOincorporation in the TiO2nanofibers. The performances of these nanocomposites for photocatalytic application have beenevaluated. The presence of rGO sheets decreases the band gap energy of TiO2NFs from 3.2 to 2.9 eV. Hence, in thephotodegradation of methyl orange (MO), a significant enhancement in the reaction rate was observed with rGO/TiO2(2 wt %)composite NFs compared to commercial TiO2-P25. In addition, the kinetic of MO degradation by rGO/TiO2(2 wt %)composite NFs is 6 times higher than that by commercial TiO2. Thus, the photocatalytic activity of the composites rGO/TiO2significantly increases the visible-light photoresponse and improves the separation of photoinduced electron−hole pairs of TiO2.