TaON and Ta3N5 as new visible light driven photocatalysts

被引：326

作者：

Hara, M

Hitoki, G

Takata, T

Kondo, JN

Kobayashi, H

Domen, K

机构：

[1] Tokyo Inst Technol, Chem Resources Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan

[2] Kurashiki Univ Sci & Arts, Coll Sci & Ind Technol, Dept Chem Technol, Kurashiki, Okayama 7128505, Japan

来源：

CATALYSIS TODAY | 2003年 / 78卷 / 1-4期

关键词：

TaON; Ta3N5; photocatalysts;

D O I：

10.1016/S0920-5861(02)00354-1

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

TaON and Ta3N5, Ta5+-based (oxy)nitrides, were studied as visible light driven photocatalysts. Under visible light irradiation (lambda greater than or equal to 420 nm), the (oxy)nitrides oxidize water to O-2 and reduce H+ to H-2 in the presence of sacrificial reagents (Ag+ and methanol). TaON oxidizes water into O-2 efficiently, with a maximum quantum yield of 10%. The photocatalytic reactions proceed via the bandgap transitions (E-g, TaON: 2.5 eV, Ta3N5: 2.1 eV) without any noticeable degradation of the catalysts. The small energy gaps of TaON and Ta3N5 are ascribed to the valence band structures consisting of N 2p orbitals. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：555 / 560

页数：6

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