Using the polarization field by piezoelectric materials was a promising technique to improve the photoinduced charges separation. In this study, PVDF-BaTiO₃-Cd_0.9Zn_0.1S (PVBC) flexible composite films were synthesized via a spin-coating method. The composite films were detailed characterized by XRD, SEM, XPS, DRS and PFM. Based on the experimental results, the polarization field generated by the piezoelectric PVDF and BaTiO₃ effectively enhanced the charge separation of the composite film, resulting in improved photocatalytic H₂ evolution performance. The optimal PVBC film exhibited the best H₂ evolution rate of 231.39 μmol/h, which was about 4.48 times higher than PVDF-Cd_0.9Zn_0.1S film. In addition, we proposed a plausible mechanism for the enhanced photocatalytic activity. In a wider perspective, this work provided an efficient strategy, combining solar energy with electric energy induced by organic flexible piezoelectric PVDF, to remarkably improve activity of photocatalysts.

利用压电材料的极化场是改善光诱导电荷分离的一种有前途的技术。本研究通过旋涂法合成了PVDF-BaTiO ₃ -Cd _0.9 Zn _0.1 S（PVBC）柔性复合膜。通过XRD，SEM，XPS，DRS和PFM对复合膜进行了详细的表征。根据实验结果，压电PVDF和BaTiO ₃产生的极化场有效地增强了复合膜的电荷分离，从而提高了光催化H _2的析出性能。最佳的PVBC膜具有231.39μmol / h的最佳H ₂析出速率，约为PVDF-Cd的4.48倍_0.9 Zn _0.1 S膜。另外，我们提出了增强光催化活性的合理机制。从更广泛的角度来看，这项工作提供了一种有效的策略，将太阳能与有机柔性压电PVDF感应的电能结合起来，可以显着提高光催化剂的活性。