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Topics in Catalysis
Published in: Topics in Catalysis 3-4/2008

01-04-2008 | Original Paper

Photocatalytic Property and Electronic Structure of Lanthanide-based Oxysulfides

Authors: Keita Ikeue, Shingo Ando, Tomohiro Mitsuyama, Yusuke Ohta, Keishi Arayama, Akiko Tsutsumi, Masato Machida

Published in: Topics in Catalysis | Issue 3-4/2008

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Abstract

Lanthanide-based oxysulfides and sulfide, LnTaO3.5S0.5, Ln10OS14 (Ln = La, Pr, Nd, Sm) and La4In5S13, were successively synthesized by sulfurization in a flowing H2S. The sulfurization decreased the band-gap energies from >4 eV to <3eV, because of the formation of occupied S3p orbitals on the top of valence band. In accordance with the small band gap, the H2 evolution from a 0.01 M Na2S and 0.01 M Na2SO3 solution system was observed under irradiation of light up to >500 nm. The rate of H2 evolution under light irradiation of >500 nm increased in the order of Ni/LaTaO3.5S0.5 < Ru/La10OS14 < Pt/La4In5S13.
previous article Preparation of Highly Active TiO2 Nano-particle Photocatalysts by a Flame Aerosol Method for the Complete Oxidation of 2-Propanol

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Metadata
Title
Photocatalytic Property and Electronic Structure of Lanthanide-based Oxysulfides
Authors
Keita Ikeue
Shingo Ando
Tomohiro Mitsuyama
Yusuke Ohta
Keishi Arayama
Akiko Tsutsumi
Masato Machida
Publication date
01-04-2008
Publisher
Springer US
Published in
Topics in Catalysis / Issue 3-4/2008
Print ISSN: 1022-5528
Electronic ISSN: 1572-9028
DOI
https://doi.org/10.1007/s11244-008-9038-7

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