title: Perovskite oxide nanosheets with tunable band-edge potentials and high photocatalytic hydrogen-evolution activity.
abstract: Perovskite nanosheets of HCa(2-x)Sr(x)Nb3O10 and HCa2Nb(3-y)Ta(y)O10 with controlled band-edge potentials were prepared. They worked as highly efficient heterogeneous photocatalysts for H2 evolution from a water/methanol mixture under band-gap irradiation. The activity was found to depend on the composition. The highest activity was obtained with HCa2Nb2TaO10 nanosheets, recording an apparent quantum yield of approximately 80% at 300 nm, which is the highest value for a nanosheet-based photocatalyst reported to date.
authors.affiliation: Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550 (Japan). maedak@chem.titech.ac.jp.
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Maeda
authors.forename: Miharu
authors.initials: M
authors.lastname: Eguchi
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Oshima
keywords: heterogeneous photocatalysis; layered compounds; nanosheets; perovskites; water splitting