WO3/ZnWO4复合薄膜的制备及其光电化学性能研究

Preparation of WO3/ZnWO4 Composite Film and Its Photoelectrochemical Performance

摘要:

摘要：采用水热法在导电玻璃(FTO)上制备WO3纳米薄膜，然后同样使用水热法并改变水热反应时长(1h，3h，5h)在WO3纳米薄膜上成功制备WO3/ZnWO4复合薄膜。利用X射线衍射和扫描电子显微镜对WO3/ZnWO4复合薄膜样品的组成结构及形貌进行分析。并对WO3/ZnWO4复合薄膜样品进行吸收光谱测试、光电流测试、光电催化测试和交流阻抗测试，结果表明WO3/ZnWO4复合薄膜样品相较于单一WO3纳米薄膜，具有更好的光吸收特性、更优秀的光电流特性和显著提升的光电催化活性。且水热反应3h的WO3/ZnWO4复合薄膜样品相较于水热反应1h和5h的WO3/ZnWO4复合薄膜样品具有最高的光电流密度和最优的光电催化效率。

Abstract:

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.