WO3/Bi2WO6复合薄膜的制备及其光电化学性能

Preparation and photoelectrochemical properties of WO3/Bi2WO6 composite film

摘要:

导电玻璃作为基底水热法制备了WO3纳米薄膜，以WO3纳米薄膜为基底，通过溶剂热法改变不同溶剂热反应时间（6h，8h，10h）成功制备了WO3/Bi2WO6复合薄膜样品，利用X射线衍射和扫描电子显微镜对WO3/Bi2WO6复合薄膜进行了表征。对WO3/Bi2WO6复合薄膜进行了吸收光谱测试、光电流测试、光电催化测试和交流阻抗测试。结果表明，WO3/Bi2WO6复合薄膜样品相较于单一WO3纳米薄膜，其具有更宽的光谱响应范围、更大的光电流密度以及更高的光电催化效率，且溶剂热反应时间为8h的WO3/Bi2WO6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。WO3/Bi2WO6复合薄膜有效的降低了复合薄膜内部电子阻抗，增加了有效光电化学反应位点，显著提升了光电化学性能，可以很好的应用于光电催化领域。

Abstract:

WO3 nano-films were synthesized on the conductive glass substrate by hydrothermal method. WO3/Bi2WO6 composite films were prepared by solvothermal method with different solvothermal reaction time (6 h, 8 h, 10 h) based on WO3 nano-films, and X-ray diffraction and scanning electron microscopy were used to characterize WO3/Bi2WO6 composite film samples. The WO3/Bi2WO6 composite film samples were tested for absorption spectroscopy, photocurrent, photoelectrocatalysis and alternating current impedance. The results show that the WO3/Bi2WO6 composite film samples have a wider spectral response range, higher photocurrent density and significantly improved photoelectrocatalysis efficiency than pure WO3 nano-films, and the WO3/Bi2WO6 composite film samples with a solvothermal reaction time of 8h have the highest photocurrent density and the best photoelectrocatalysis efficiency. The WO3/Bi2WO6 composite film effectively reduces the internal electronic impedance, increases the effective photoelectrochemical reaction sites, significantly improves the photoelectrochemical property, and can be well applied in the field of photoelectrocatalysis.