A fundamental challenge of photocatalysis is developing efficient strategies to suppress the recombination of photogenerated charge carriers. Herein, ZnO/BiVO₄ hierarchical nanostructures were exemplified to demonstrate new concept of multi-electric field-assisted charge separation. The contribution of both facet engineering and defect modulation to the facilitated photocatalysis was confirmed by both experimental observations and theoretical calculations. Such integration of built-in fields in faceted BiVO₄ and anisotropic ZnO nanorods, together with the possible Z-scheme at the interfaces resulted into 1.36 mmol h⁻¹ g⁻¹ O₂ produced under visible light irradiation, and more than one order of magnitude enhanced apparent quantum yield at 450 nm. This work not only provides fundamental insights into the facet-dependent distribution of interfacial defects, but also offers a strategy for the design of faceted heterojunctions with controlled vacancies for significantly enhanced charge separation.

光催化的基本挑战是开发有效的策略来抑制光生电荷载体的重组。在此，以ZnO / BiVO ₄分层纳米结构为例，以证明多电场辅助电荷分离的新概念。实验观察和理论计算均证实了刻面工程和缺陷调节对促进光催化的贡献。面状BiVO ₄和各向异性ZnO纳米棒中内置场的这种整合以及界面处可能的Z方案导致了1.36 mmol h ^-1 g ^-1 O ₂在可见光照射下产生的二价钛，并且超过一个数量级提高了在450 nm的表观量子产率。这项工作不仅为界面缺陷的面依赖性分布提供了基本的见识，而且还为设计具有可控制空位的多面异质结提供了一种策略，以显着增强电荷分离。