Composition dependence of the photophysical and photocatalytic properties of (AgNbO3)1-x(NaNbO3)x solid solutions

被引：106
作者：
Li, Guoqiang
Kako, Tetsuya
Wang, Defa
Zou, Zhigang
Ye, Jinhua
机构：
[1] Natl Inst Mat Sci, Photocatalyt Mat Ctr, Tsukuba, Ibaraki 3050047, Japan
[2] Nanjing Univ, Ecomat & Renew Energy Res Ctr, Dept Phys, Nanjing 210093, Peoples R China
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2007年 / 180卷 / 10期
基金：
中国国家自然科学基金;
关键词：
AgNbO3; NaNbO3; solid solution; visible-light-sensitive photocatalyst;
D O I：
10.1016/j.jssc.2007.08.006
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A series of orthorhombic photocatalysts (AgNbO3)(1-x)(NaNbO3)(x) solid solutions have been synthesized by a solid-state reaction method. The composition dependence of the photophysical and photocatalytic properties of synthesized solid solutions has been investigated systematically. With an increase in the content of NaNbO3, We found that (1) the lattice parameters decreased; (2) the Nb-O bond length in NbO6 octahedron reduced; (3) the band gap increased; and (4) the mean particle size decreased while the Brunauer-Emmett-Teller (BET) surface area increased. Photocatalytic activities of the (AgNbO3)(1-x)(NaNbO3)(x), (0 <= x <= 0.5) samples were evaluated from gaseous 2-propanol (IPA) decomposition into acetone and CO2 under visible-light irradiation emitted from blue-light-emitting diodes (BLEDs; light intensity: 0.01 mW cm(-2)). Among all the samples, the (AgNbO3)(0.6)(NaNbO3)(0.4) sample showed the highest photocatalytic activity. (C) 2007 Elsevier Inc. All rights reserved.
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收藏
页码：2845 / 2850
页数：6
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