title: A heterojunction photocatalyst composed of zinc rhodium oxide, single crystal-derived bismuth vanadium oxide, and silver for overall pure-water splitting under visible light up to 740 nm.
abstract: We recently reported the synthesis of a solid-state heterojunction photocatalyst consisting of zinc rhodium oxide (ZnRh2O4) and bismuth vanadium oxide (Bi4V2O11), which functioned as hydrogen (H2) and oxygen (O2) evolution photocatalysts, respectively, connected with silver (Ag). Polycrystalline Bi4V2O11(p-Bi4V2O11) powders were utilized to form ZnRh2O4/Ag/p-Bi4V2O11, which was able to photocatalyze overall pure-water splitting under red-light irradiation with a wavelength of 700 nm (R. Kobayashi et al., J. Mater. Chem. A, 2016, 4, 3061). In the present study, we replaced p-Bi4V2O11with a powder obtained by pulverizing single crystals of Bi4V2O11(s-Bi4V2O11) to form ZnRh2O4/Ag/s-Bi4V2O11, and demonstrated that this heterojunction photocatalyst had enhanced water-splitting activity. In addition, ZnRh2O4/Ag/s-Bi4V2O11was able to utilize nearly the entire range of visible light up to a wavelength of 740 nm. These properties were attributable to the higher O2evolution activity of s-Bi4V2O11.
authors.affiliation: Special Doctoral Program for Green Energy Conversion Science and Technology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan.
authors.forename: Ryoya
authors.initials: R
authors.lastname: Kobayashi
authors.affiliation: Clean Energy Research Center, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan. hirie@yamanashi.ac.jp.
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Takashima
authors.affiliation: Special Doctoral Program for Green Energy Conversion Science and Technology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Tanigawa
authors.affiliation: Graduate School of Environmental Science, Hokkaido University, Nishi 10, Nishi 5, Sapporo, Hokkaido 060-0810, Japan.
authors.forename: Shugo
authors.initials: S
authors.lastname: Takeuchi
authors.affiliation: Institute for Catalysis, Hokkaido University, Nishi 10, Kita 21, Sapporo, Hokkaido 001-0021, Japan.
authors.forename: Bunsho
authors.initials: B
authors.lastname: Ohtani
authors.affiliation: Clean Energy Research Center, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan. hirie@yamanashi.ac.jp and Institute for Catalysis, Hokkaido University, Nishi 10, Kita 21, Sapporo, Hokkaido 001-0021, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Irie