Abstract:Using conductive glass as the substrate, WO3 nano-film is prepared by hydrothermal method. Then WO3/ZnWO4 composite films with different hydrothermal reaction time (1h, 3h, 5h) were successfully prepared on WO3 nano-film. The synthesis and characterization of the WO3/ZnWO4 composite films were performed by X-ray diffraction test and scanning electron microscope test. The photoelectric performance parameters of WO3/ZnWO4 composite film samples were obtained by absorption spectrum test, photocurrent test, photoelectric catalytic test and AC impedance test. The analysis results show that the WO3/ZnWO4 composite film sample has a wider spectral response range, higher photocurrent density and significantly improved photoelectric catalytic efficiency than WO3 nano-film. The WO3/ZnWO4 composite film samples with hydrothermal reaction for 3h have the highest photocurrent density and the best photoelectric catalytic efficiency than the samples which hydrothermal reaction time is 1h and 5h.