Ferroelectric perovskite PbTiO ₃ for advanced photocatalysis

Abstract

Abstract The ferroelectric semiconductor material PbTiO 3 exhibits remarkable spontaneous polarization and photoelectric properties, positioning it as a promising polar photocatalyst. The internal electric field of ferroelectrics can separate photocarriers and enhance the catalytic performance of photocatalysts. Moreover, when combined with other semiconductors, PbTiO 3 contributes to the construction of a depolarization field, extending the catalytic applications of PbTiO 3 catalysts. PbTiO 3 exhibits optical absorption, semiconductor, and piezoelectric properties. Its piezoelectric polarization field enhances charge separation, modulates band structure, surface charge conduction, and heterojunction interface charge conduction, thereby amplifying photocatalytic activity. This paper begins by examining the structure, properties, and preparation methods of PbTiO 3 . Subsequently, it delves into the optimization of PbTiO 3 's structure and performance, exploring applications in photocatalysis as a ferroelectric photocatalyst. Emphasis is placed on the detailed discussion of surface modification, heterostructure formation, and ferroelectric polarization of PbTiO 3 ferroelectrics. These aspects are thoroughly explored for their role in regulating activity and optimizing the performance of photocatalysis and photopiezoelectric catalysis. In conclusion, the paper addresses the current research status of PbTiO 3 ferroelectric materials and highlights the challenges that lie ahead. The intention is to provide valuable references for the ongoing research in PbTiO 3 ferroelectric materials.