In this work, we report on the photoelectrocatalytic properties of nanostructured ZnO/CuWO₄ heterojunction film prepared by combining the hydrothermal and doctor-blade methods. For ZnO and CuWO₄ heterojunction films, X-ray diffraction (XRD) spectra showed the wurtzite and triclinic structure phases, respectively, and no deleterious phases were observed. Scanning electron microscopy (SEM) images showed ZnO nanorods (NRs) grown perpendicular to the substrate and a CuWO₄ nanoparticle surface coating on the ZnO/CuWO₄ film. The formation of heterojunction film allowed a greater use of visible light and better photoelectrochemical behavior for the ZnO/CuWO₄ film. The ZnO, CuWO₄, and ZnO/CuWO₄ films were used for electrochemically assisted (PEC) RhB photodegradation. The ZnO/CuWO₄ film had a PEC photodegradation efficiency of 82 %, making it approximately twice as effective as ZnO film. The incorporation of CuWO₄ into the ZnO NR array film with a bias potential remarkably promoted the photogenerated carrier separation and increased the use of photogenerated carriers in photocatalytic reactions, resulting in a higher photocatalytic activity under visible light.

在这项工作中，我们报告了结合水热法和刮刀法制备的纳米结构ZnO / CuWO ₄异质结薄膜的光电催化性能。对于ZnO和CuWO ₄异质结薄膜，X射线衍射（XRD）光谱分别显示纤锌矿结构和三斜晶结构相，未观察到有害相。扫描电子显微镜（SEM）图像显示垂直于基材生长的ZnO纳米棒（NRs）和在ZnO / CuWO ₄膜上的CuWO ₄纳米颗粒表面涂层。异质结薄膜的形成允许ZnO / CuWO ₄薄膜更多地使用可见光和更好的光电化学行为。ZnO，CuWO ₄，并使用ZnO / CuWO ₄膜进行电化学辅助（PEC）RhB光降解。ZnO / CuWO ₄膜的PEC光降解效率为82％，约是ZnO膜的两倍。具有偏置电势的ZnWO NR阵列膜中加入CuWO ₄显着促进了光生载流子的分离，并增加了光生载流子在光催化反应中的使用，从而在可见光下具有更高的光催化活性。