【摘要】 钙钛矿铁电材料晶体的正负电荷中心不重合引起其内部自发极化产生内建电场，利于光激发载流子的传输与分离。然而钙钛矿铁电材料多属于宽带隙半导体，存在光生电子空穴易复合问题，因此调控其光电化学性能是研究热点。介绍了元素掺杂与取代、表面贵金属沉积、半导体异质结构建和多机制耦合等调控钙钛矿铁电材料光电化学性能的原理与进展。重点关注了近年来该材料在光催化降解污染物、光催化制氢和光电化学分解水制氢等应用现状。更多还原

【Abstract】 The non-coincidence of the positive and negative charge centers of perovskite ferroelectric crystals leads to spontaneous polarization inside the materials to generate a built-in electric field. The existence of built-in electric field is beneficial to the transmission and separation of photo-excited carriers. However, perovskite ferroelectric materials are mostly wide-band gap semiconductors. Photogenerated electrons and holes generated when materials are excited are easy to recombine. Therefore, adjusting their photoelectrochemical performance has become a research hotspot. In this paper, the principles and progress of controlling the photoelectrochemical performance of perovskite ferroelectric materials are introduced, such as doping and substitution of elements, deposition of precious metals on the surface, construction of semiconductor heterostructure and multi-mechanism coupling. The applications status of these materials in photocatalytic degradation of pollutants, photocatalytic hydrogen production and photoelectrochemical water splitting hydrogen production in recent years are emphatically introduced.更多还原