采用一步水热法在FTO导电玻璃上制备了WO₃纳米薄膜,并通过电沉积法在WO₃纳米薄膜上生长CuBi₂O₄制备了WO₃/CuBi₂O₄异质结。利用SEM、XRD、XPS等对WO₃/CuBi₂O₄的形貌和晶体结构进行分析,并对其进行紫外-可见光谱、光电流及交流阻抗等测试。结果表明,WO₃/CuBi₂O₄异质结的可见光吸收范围拓宽,其光电流密度(0.56 mA/cm²)为纯WO₃(0.22 mA/cm²)的2.5倍,ABPE效率提升至0.22%。此外,WO₃/CuBi₂O₄异质结使载流子阻抗降低、迁移率提高,从而提高光电化学性能。

WO₃ nanofilms are prepared on FTO conductive glass via one-step hydrothermal method,and WO₃/CuBi₂O₄ heterojunction is prepared by growing CuBi₂O₄ on WO₃ nanofilms through electrodeposition method.The morphology and crystal structure of WO₃/CuBi₂O₄ are analyzed by means of SEM,XRD and XPS.WO₃/CuBi₂O₄ is also characterized by absorption spectrum,photocurrent and AC impedance.Experimental results show that WO₃/CuBi₂O₄ heterojunction widens visible light absorption range,its photocurrent density (0.56 mA·cm^-2) is 2.5 times that of pure WO₃ (0.22 m A·cm^-2) and its ABPE efficiency increases to 0.22%.In addition,WO₃/CuBi₂O₄ heterojunction significantly reduces the carrier impedance and improves the mobility,thus improving the photoelectrochemical properties.

吴涛(1998-),男,硕士研究生,研究方向为半导体光电催化,813477048@qq.com