SrTiO₃ is a well-known highly active photocatalyst with high energy conversion efficiency. In this study, we investigated the formation of oxygen vacancy by using the chemo-mechanical effect that was introduced by the dispersion of metal particles into grain and photocatalytic activity to water splitting. Au dispersion on SrTiO₃ followed by sintering treatment was studied for introduction of chemo-mechanical strain because of a different thermal expansion coefficient; the introduced chemo-mechanical strain generated oxygen vacancy in SrTiO₃. Thus, induced chemo-mechanical strain shows change in electronic band structure resulting in increasing lowest unoccupied molecular orbital (LUMO) level with increasing Au content. Since photoluminescence was significantly decreased by sintering after Au dispersion, the introduced strain effects may work for increasing a charge separation efficiency and adsorption site in water splitting. Therefore, the photocatalytic activity was much increased by sintering treatment after Au dispersion on SrTiO₃.

SrTiO ₃是众所周知的具有高能量转化效率的高活性光催化剂。在这项研究中，我们通过利用化学机械效应研究了氧空位的形成，该化学机械效应是由金属颗粒向谷物中的分散以及光分解水的光催化活性引入的。研究了由于热膨胀系数不同而在SrTiO ₃上分散金并进行烧结处理以引入化学机械应变的方法。引入的化学机械应变在SrTiO _3中产生氧空位。因此，诱导的化学机械应变显示出电子能带结构的变化，导致随着Au含量的增加，最低的未占据分子轨道（LUMO）的水平增加。由于在Au分散后通过烧结显着降低了光致发光，所以引入的应变效应可能有助于增加水分离中的电荷分离效率和吸附位点。因此，通过在SrTiO ₃上分散Au之后进行烧结处理，光催化活性大大提高。