Highly crystalline Na0.5Bi0.5TiO3of a photocatalyst valence-band-controlled with Bi(iii) for solar water splitting

Kenta Watanabe, Yoichi Iikubo, Yuichi Yamaguchi, Akihiko Kudo

Research output: Contribution to journalArticlepeer-review


Na0.5Bi0.5TiO3 (BG 3.1 eV) with a valence band formed by Bi(iii) was found as a new photocatalyst for solar water splitting. The water splitting activity of highly crystalline Na0.5Bi0.5TiO3 synthesized by a flux method was much higher than that of the samples synthesized by a solid-state reaction. The optimized RhCr2Ox(0.1 mol%)/Na0.5Bi0.5TiO3/CoOOH(0.02 mol%) gave a 5.1% apparent quantum yield at 350 nm and split water even under simulated sunlight irradiation with a 0.05% solar to hydrogen energy conversion efficiency. We have successfully achieved solar water splitting using a one-step photoexcitation type photocatalyst valence-band-controlled with Bi(iii). This journal is

Original languageEnglish
Pages (from-to)323-326
Number of pages4
JournalChemical Communications
Issue number3
Publication statusPublished - 11 Jan 2021

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