Photoactive perovskites NaTaO₃ and BaBiO₃ were synthesized by the solid-state method. The resulting compounds were mixed by wet impregnation, adding BaBiO₃ (BBO) onto the base material NaTaO₃ (NTO) to obtain the compounds X-BBO/NTO (X = 5–30 wt.%). The sample 20-BBO/NTO presented the largest crystallites (135 nm). Since BaBiO₃ presents narrower Eg value (≈ 2 eV) than NaTaO₃ (≈ 4 eV), the addition of BBO to NTO promoted a better visible light harvesting. This feature can be explained by the formation of a heterojunction, which improves the photocatalytic activity by an abatement of the charge carrier recombination. Photoelectrochemical tests showed an improvement in the charge transfer resistance and enhanced photoelectrocatalytic activity for the 20-BBO/NTO sample, over the other BBO concentrations and bare photocatalysts. An optimal amount of BaBiO₃ (20 wt.%) increased the synergy of the n-type heterojunction by an enhancement in the charge transfer processes to perform the photoelectrocatalytic water splitting. 20-BBO/NTO sample showed the highest hydrogen production of 54 μmol g⁻¹, which outstripped 1.4 times the photocatalytic hydrogen generation of the bare NaTaO₃ semiconductor.

通过固态法合成了光敏钙钛矿NaTaO ₃和BaBiO ₃。通过湿法浸渍将所得化合物混合，将BaBiO ₃（BBO）添加到基础材料NaTaO ₃（NTO）上以获得化合物X-BBO / NTO（X = 5-30 wt。％）。样品20-BBO / NTO呈现最大的微晶（135 nm）。由于BaBiO _3的Eg值（≈2 eV）比NaTaO ₃窄（≈4 eV），将BBO加入NTO促进了更好的可见光收集。该特征可以通过形成异质结来解释，该异质结通过减少电荷载流子复合而改善了光催化活性。光电电化学测试显示，与其他BBO浓度和裸露的光催化剂相比，20-BBO / NTO样品的电荷转移阻力得到改善，光电催化活性增强。最佳量的BaBiO ₃（20 wt。％）通过增强电荷转移过程以执行光电催化水分解来提高n型异质结的协同作用。20-BBO / NTO样品显示最高的氢气产生量为54μmolg ^-1，其光催化氢生成量是裸NaTaO ₃半导体的1.4倍。