Abstract: | A nitrogen‐doped TiO2 (N‐TiO2) nanowire film was synthesized via a one‐pot hydrothermal method using triethylamine as nitrogen source. The effect of the concentration of the triethylamine on the films was evaluated. In addition, the N‐TiO2 nanowires were characterized using field‐emission scanning electron microscopy (FE‐SEM), X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and ultraviolet–visible spectroscopy. A 3.2× enhancement of the photocurrent for N‐TiO2 (0.6) was achieved over the as‐prepared TiO2 nanowire, under AM1.5G solar illumination. This was due to nitrogen doping, which could narrow the bandgap of titania to extend the adsorption of the catalyst to the visible light region. |