Photocatalytic property and electronic structure of lanthanide-based oxysulfides

被引：10

作者：

Ikeue, Keita ^{[1
]}

Ando, Shingo ^{[1
]}

Mitsuyama, Tomohiro ^{[1
]}

Ohta, Yusuke ^{[1
]}

Arayama, Keishi ^{[1
]}

Tsutsumi, Akiko ^{[1
]}

Machida, Masato ^{[1
]}

机构：

[1] Kumamoto Univ, Grad Sch Sci & Technol, Dept Nano Sci & Technol, Kumamoto 8608555, Japan

来源：

TOPICS IN CATALYSIS | 2008年 / 47卷 / 3-4期

关键词：

photocatalyst; oxysulfide; H(2) evolution; visible light irradiation; lanthanide;

D O I：

10.1007/s11244-008-9038-7

中图分类号：

O69 [应用化学];

学科分类号：

081704 [应用化学];

摘要：

Lanthanide-based oxysulfides and sulfide, LnTaO(3.5)S(0.5), Ln(10)OS(14) (Ln = La, Pr, Nd, Sm) and La(4)In(5)S(13), were successively synthesized by sulfurization in a flowing H(2)S. 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 H(2) evolution from a 0.01 M Na(2)S and 0.01 M Na(2)SO(3) solution system was observed under irradiation of light up to > 500 nm. The rate of H(2) evolution under light irradiation of > 500 nm increased in the order of Ni/LaTaO(3.5)S(0.5) < Ru/La(10)OS(14) < Pt/La(4)In(5)S(13).

引用

页码：175 / 180

页数：6

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