Recent Advances in BaTiO ₃ ‐Based Piezocatalysis

ABSTRACT Piezocatalysis, which directly converts mechanical energy into chemical driving force, represents a promising green and low‐energy chemical transformation technology. This process relies on the piezoelectric effect, where mechanical stress induces internal polarization charges in a material, facilitating efficient electron‐hole separation and subsequent radical generation and surface redox reactions. Among various piezoelectric martials, BaTiO ₃ has shown wide application potential in cutting‐edge fields such as energy conversion, environmental remediation, organic synthesis, and biomedical therapy due to its significant piezoelectric coefficient, good chemical stability, and adjustable crystal structure and energy band characteristics. This review systematically reviews the latest research progress of BaTiO ₃ ‐based materials, and expounds the important breakthroughs made in improving their piezoelectric response performance, optimizing interfacial charge separation efficiency, and enhancing catalytic stability through various strategies such as microscopic defect engineering, heterogeneous structure construction, and macroscopic structure design. The review further delves into the latest advancements in several key areas: hydrogen production via water splitting for energy conversion; the degradation of organic pollutants in water and air for environmental remediation; copper‐free click chemistry as a green pathway in organic synthesis; and piezocatalytic tumor therapy in biomedicine. Finally, it offers a forward‐looking perspective on the critical challenges and future opportunities confronting BaTiO ₃ ‐based piezocatalysis.