Charge Transport Properties of Cu2S/Bivo4 Composite Photocatalyst

The Cu2S/BiVO4 composite photocatalysts had been synthesised by a simple solution adsorption method. The obtained samples were characterised by means of field emission scanning electron microscope (SEM), X-ray diffraction patterns (XRD), UV-visible absorption spectrum techniques and transient photovoltage spectra (TPV). The results showed that the Cu2S nanoparticles were evenly loaded on the surface of the dumbbell-like BiVO4 composites. Compared with pure BiVO4, Cu2S/BiVO4 composites had better photocatalytic activity. Furthermore, the photogenerated charge transport properties of Cu2S/BiVO4 composites were investigated by means of TPV technique. The interface between BiVO4 and Cu2S enhanced the separation efficiency of photogenerated charge carriers, thus, the photocatalytic activitie of Cu2S/BiVO4 composites was enhanced.