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Synthesis, structure and photocatalytic activity of layered LaOInS2

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Title: Synthesis, structure and photocatalytic activity of layered LaOInS2
Authors: Miura, Akira Browse this author →KAKEN DB
Oshima, Takayoshi Browse this author
Maeda, Kazuhiko Browse this author
Mizuguchi, Yoshikazu Browse this author
Moriyoshi, Chikako Browse this author
Kuroiwa, Yoshihiro Browse this author
Meng, Yu Browse this author
Wen, Xiao-Dong Browse this author
Nagao, Masanori Browse this author
Higuchia, Mikio Browse this author
Tadanaga, Kiyoharu Browse this author
Issue Date: 21-Jul-2017
Publisher: Royal Society of Chemistry
Journal Title: Membrane water treatment
Volume: 5
Issue: 27
Start Page: 14270
End Page: 14277
Publisher DOI: 10.1039/c7ta04440b
Abstract: Indium oxychalcogenides would be attractive semiconductors considering the practical use of indium oxides and sulfides such as indium-tin oxides (ITO) and copper-indium-gallium diselenides (CIGS). In this work, a novel layered indium oxysulfide, LaOInS2, was synthesized by a metathesis reaction between LaOCl and NaInS2. Synchrotron X-ray diffraction showed that LaOInS2 consisted of alternately stacked rocksalt-type In-S and PbO-type La-O layers. The InS6 octahedron had split In sites with abnormally large anisotropic atomic displacement factors. LaOInS2 was found to be a direct semiconductor. Density functional theory calculations exhibited well-dispersed bands composed of In 5s/5p and S 3p/O 2p orbitals with a band gap of similar to 2.4 eV, which was close to the experimental value estimated by optical absorption (2.64 eV). Under visible light irradiation this visible-light absorption, LaOInS2 exhibited photocatalytic activity for H-2 and O-2 evolution from water with the aid of Pt and IrO2 cocatalysts, respectively.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 三浦 章

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