Abstract
AbstractThe improvement of photocatalytic activity of BaTi4O9 to overall H2O splitting was investigated. From the evaluation of co‐catalysts, Rh0.7Cr1.3O3 was preferable. However, this co‐catalyst was degrading with the progress of the photocatalytic reaction. When CoOx was co‐loaded as the co‐catalyst for O2 evolution reaction over the surface, the steady progress of the photocatalytic reaction can be confirmed. Here, effective way and condition for loading CoOx co‐catalyst as well as effective preparation method of BaTi4O9 were demonstrated in order to improve the photocatalytic activity of BaTi4O9 with Rh0.7Cr1.3O3 and CoOx co‐catalysts to the overall H2O splitting. As the results, the photocatalyst prepared by preferable method and condition showed high photocatalytic activity to the overall H2O splitting, where the apparent quantum yield (AQY) at 313 nm reached to 41 %.
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