Abstract: WO3/CuWO4 composite films with three-dimensional structure were successfully prepared by a two-step hydrothermal method. The optimal preparation conditions for the WO3/CuWO4 composite films were obtained by adjusting the hydrothermal time of CuWO4. The photoelectric performance parameters of WO3/CuWO4 composite films were obtained by absorption spectrum test, photocurrent test, photoelectrocatalysis test, and electrochemical impedance test. The results show that the band gap of WO3/CuWO4-5 h composite film was 2.44 eV between CuWO4 and WO3, which indicated a wider spectral response range. WO3/CuWO4-5 h composite film exhibited a high photocurrent density of 2.11 mA/cm2 at 1.5 V vs. Ag/AgCl. The photoelectrocatalysis degradation efficiency of methylene blue solution by WO3/CuWO4-5 h composite film was 58.5%, which was higher than that of the pure WO3 film (degradation efficiency was 41.4%). Electrochemical impedance spectroscopy showed that the charge transfer resistance of WO3/CuWO4 was less than that of pure WO3 film, corresponding to better photoelectrochemical performance.
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2023, Vol. 37 
