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Synthesis, structure and photocatalytic activity of layered LaOInS2
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) |
URI: | http://hdl.handle.net/2115/71319 |
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)
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Submitter: 三浦 章
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