title: Water Splitting and CO2 Reduction under Visible Light Irradiation Using Z-Scheme Systems Consisting of Metal Sulfides, CoOx-Loaded BiVO4, and a Reduced Graphene Oxide Electron Mediator.
abstract: Metal sulfides are highly active photocatalysts for water reduction to form H2 under visible light irradiation, whereas they are unfavorable for water oxidation to form O2 because of severe self-photooxidation (i.e., photocorrosion). Construction of a Z-scheme system is a useful strategy to split water into H2 and O2 using such photocorrosive metal sulfides because the photogenerated holes in metal sulfides are efficiently transported away. Here, we demonstrate powdered Z-schematic water splitting under visible light and simulated sunlight irradiation by combining metal sulfides as an H2-evolving photocatalyst, reduced graphene oxide (RGO) as an electron mediator, and a visible-light-driven BiVO4 as an O2-evolving photocatalyst. This Z-schematic photocatalyst composite is also active in CO2 reduction using water as the sole electron donor under visible light.
authors.affiliation: Department of Applied Chemistry, Faculty of Science, Tokyo University of Science , 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.|Photocatalysis international Research Center, Research Institute for Science and Technology, Tokyo University of Science , 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan.
authors.forename: Akihide
authors.initials: A
authors.lastname: Iwase
authors.affiliation: Department of Applied Chemistry, Faculty of Science, Tokyo University of Science , 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
authors.forename: Shunya
authors.initials: S
authors.lastname: Yoshino
authors.affiliation: Department of Applied Chemistry, Faculty of Science, Tokyo University of Science , 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
authors.forename: Tomoaki
authors.initials: T
authors.lastname: Takayama
authors.affiliation: Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales , Sydney, NSW 2052, Australia.
authors.forename: Yun Hau
authors.initials: YH
authors.lastname: Ng
authors.affiliation: Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales , Sydney, NSW 2052, Australia.
authors.forename: Rose
authors.initials: R
authors.lastname: Amal
authors.affiliation: Department of Applied Chemistry, Faculty of Science, Tokyo University of Science , 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.|Photocatalysis international Research Center, Research Institute for Science and Technology, Tokyo University of Science , 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan.
authors.forename: Akihiko
authors.initials: A
authors.lastname: Kudo