Sr 2？xBa xTa 3O 10 ？yN z ( x = 0.0, 0.5, 1.0) nanosheets were prepared by exfoliating layered perovskite compounds (CsSr 2？xBa xTa 3O 10 ？yN z). The Sr 1.5Ba 0.5Ta 3O 9.7N 0.2 nanosheet showed the highest photocatalytic activity for H 2 production from the water/methanol system among the Sr 2？xBa xTa 3O 9.7N 0.2 nanosheets prepared. In addition, Rh-loaded Sr 1.5Ba 0.5Ta 3O 9.6N 0.3 nanosheet showed the photocatalytic activity for oxygen and hydrogen production from water. The ratio of hydrogen to oxygen evolved was around two. These results indicate that the Rh-loaded Sr 1.5Ba 0.5Ta 3O 9.6N 0.3 nanosheet is a potential catalyst for photocatalytic water splitting.
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