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

doi:10.1039/d0cc07371g

Highly crystalline Na_0.5Bi_0.5TiO₃of a photocatalyst valence-band-controlled with Bi(iii) for solar water splitting

Kenta Watanabe, Yoichi Iikubo, Yuichi Yamaguchi, Akihiko Kudo

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

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).

Original language	English
Pages (from-to)	323-326
Number of pages	4
Journal	Chemical Communications
Volume	57
Issue number	3
DOIs	https://doi.org/10.1039/d0cc07371g
Publication status	Published - 11 Jan 2021

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abstract = "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).",

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AU - Watanabe, Kenta

AU - Iikubo, Yoichi

AU - Yamaguchi, Yuichi

AU - Kudo, Akihiko

N1 - Publisher Copyright: © The Royal Society of Chemistry.

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Y1 - 2021/1/11

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AB - 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).

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Highly crystalline Na_0.5Bi_0.5TiO₃of a photocatalyst valence-band-controlled with Bi(iii) for solar water splitting

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