title: Hydrogen production using zinc-doped carbon nitride catalyst irradiated with visible light.
abstract: Recently, graphitic carbon nitride (g-C3N4) has been investigated as a photocatalyst for water splitting and organic dye degradation. In this study, we have developed a simple soft-chemical method of doping Zn into g-C3N4to prepare a metal-containing carbon nitride. The doping was confirmed by x-ray photoelectron spectroscopy, and diffusion reflectance spectra revealed a significant red shift in the absorption edge of Zn/g-C3N4. This hybrid material shows high photocatalytic activity and good stability for hydrogen evolution from an aqueous methanol solution under visible light irradiation (λ≥420 nm). The hydrogen evolution rate was more than 10 times higher for a 10%-Zn/g-C3N4sample (59.5 μmol h-1) than for pure g-C3N4. The maximum quantum yield was 3.2% at 420 nm.
authors.affiliation: Department of Chemistry, Graduate School of Science, Hokkaido University, Sapporo, Japan; International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki, Japan; Photocatalytic Materials Center (PCMC), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki, Japan.
authors.forename: Bing
authors.initials: B
authors.lastname: Yue
authors.affiliation: Photocatalytic Materials Center (PCMC), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki, Japan.
authors.forename: Qiuye
authors.initials: Q
authors.lastname: Li
authors.affiliation: Materials Analysis Station, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki, Japan.
authors.forename: Hideo
authors.initials: H
authors.lastname: Iwai
authors.affiliation: Department of Chemistry, Graduate School of Science, Hokkaido University, Sapporo, Japan; Photocatalytic Materials Center (PCMC), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Kako
authors.affiliation: Department of Chemistry, Graduate School of Science, Hokkaido University, Sapporo, Japan; International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki, Japan; Photocatalytic Materials Center (PCMC), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki, Japan.
authors.forename: Jinhua
authors.initials: J
authors.lastname: Ye
keywords: carbon nitride; hydrogen evolution; photocatalysis; visible light; zinc containing