SrTaO₂N is generally prepared by nitriding Sr₂Ta₂O₇ at high temperature. Using the similar crystal structure between precursor and photocatalyst can reduce the synthesized temperature by topotactic transformation. NaTaO₃, which has the identical perovskite crystal structure as SrTaO₂N, was used as the precursor to synthesize SrTaO₂N in this work. The highest photocurrent for single crystal SrTaO₂N synthesized with NaTaO₃ as precursor, which can be prepared successfully at 800 °C, was 5.6-fold higher than Sr₂Ta₂O₇ as precursor. Many characters were measured to explore the reasons for the increasing in photoelectrocatalytic activity. These results imply that the increase in charge separation efficiency, due to the increase in surface OH^– and the decrease in Ta⁴⁺, is the main reason for the higher solar to hydrogen conversion efficiency.

中文翻译：

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的羟基基团的富单晶SrTaO合成₂从单晶NaTaOÑ ₃通过局部规整转化

SrTaO ₂ N被通常通过氮化锶制备₂的Ta ₂ ö ₇在高温下。在前体和光催化剂之间使用相似的晶体结构可以通过全位相转变降低合成温度。在此工作中，使用具有与SrTaO ₂ N相同的钙钛矿晶体结构的NaTaO ₃作为合成SrTaO ₂ N的前体。以NaTaO ₃为前驱体合成的单晶SrTaO ₂ N的最高光电流（可在800°C成功制备）比Sr ₂ Ta ₂ O ₇高5.6倍。作为先驱。测量了许多特征以探究光电催化活性增加的原因。这些结果意味着，增加的电荷分离效率，由于在表面OH的增加^-和钽的降低^{4 +}，对于更高的太阳能到氢气转换效率的主要原因。