Synthesis and characterization of ZnO/g-C3N4 hybrid nanofibers photocatalyst for the removal of organic pollutants from water

ZnO/g-C3N4 hybrid nanofibers containing different concentrations of g-C3N4 nanosheets  were  prepared using electrospinning technique; this was  followed by annealing at 460 ˚C for one hour in a box furnace. Based on scanning electron microscopy (SEM) image analysis,  the mean diameter of the nanofibers was measured to be  ~ 55 nm. Fourier transform infrared (FTIR) spectroscopy  confirmed the presence of ZnO and g-C3N4 in the prepared nanofibers. The photocatalytic activity of the nanofibers was examined under UV photoirradiation, showing  that the ZCN0.5 nanofibers containing 0.5 wt% of g-C3N4 exhibited the highest performance, as compared to other photocatalysts. The observed improvement in photodegradation over the optimized photocatalyst could  be due to retardation in the  charge carriers’ recombination rate in the ZCN0.5 photocatalyst sample,  as compared with the pure ZnO and pure g-C3N4.