Herein, we demonstrate a sodium/molybdenum (Na/Mo) co-doped ferroelectric PbTiO₃ for efficient photocatalysis under visible light. Doped with a high concentration of Mo⁶⁺, quasi-continuous new energy levels are successfully introduced below the conduction band minimum of PbTiO₃, giving rise to a band-to-band redshift of the absorption edge. The valence state difference of Mo⁶⁺ and Ti⁴⁺ in the doped PbTiO₃ is compensated by the Na dopant, thus effectively suppressing the formation of the recombination centres caused by Mo⁴⁺. Combined with the intrinsic built-in electric field in PbTiO₃, this Na/Mo co-doping strategy enables PbTiO₃ to exhibit superior water oxidation activity under visible light with threshold wavelength up to 550 nm, which also promotes overall water splitting under visible light in a Z-scheme photocatalytic system. This strategy provides a generally applicable solution to extend the visible light absorption spectrum and engineer electronic structures of ferroelectric materials for photocatalysis and other energy conversion applications.

中文翻译：

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Na/Mo共掺杂PbTiO3用于可见光下光催化水氧化和Z型整体水分解


在此，我们展示了钠/钼 (Na/Mo) 共掺杂铁电 PbTiO ₃ 在可见光下可实现高效光催化。掺杂高浓度的 Mo ⁶⁺ ，在 PbTiO ₃ 导带最小值以下成功引入准连续新能级，产生带间红移吸收边。掺杂PbTiO ₃ 中Mo ⁶⁺ 和Ti ⁴⁺ 的价态差异被Na掺杂剂补偿，从而有效抑制了复合中心的形成。作者：莫 ⁴⁺ 。结合 PbTiO ₃ 固有的内置电场，这种 Na/Mo 共掺杂策略使 PbTiO ₃ 在可见光下表现出优异的水氧化活性，阈值波长可达550 nm，这也促进了 Z 型光催化系统中可见光下的整体水分解。该策略提供了一种普遍适用的解决方案，可以扩展可见光吸收光谱并设计铁电材料的电子结构，用于光催化和其他能量转换应用。