Visible-light-driven NaTaO3-xNx catalyst prepared by a hydrothermal process

被引：65

作者：

Fu, Hongbo ^{[1
,2
]}

Zhang, Shicheng ^{[2
]}

Zhang, Liwu ^{[1
]}

Zhu, Yongfa ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

[2] Fudan Univ, Dept Environm Sci & Technol, Shanghai 200433, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2008年 / 43卷 / 04期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

oxides; chemical synthesis; catalytic properties; semiconductivity;

D O I：

10.1016/j.materresbull.2007.05.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

NaTaO3-xNx catalyst has been successfully synthesized from N-doped Ta2O5 precursors by a simple hydrothermal process. The as-prepared samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and diffuse reflectance spectroscopy. Density functional theory calculations suggested that the valence band of the catalysts was composed of the hybrid O 2p and N 2p orbitals, and the visible-light sensitivity is due to the narrowing of the band gap by mixing N 2p and O 2p states. NaTaO3-xNx catalyst could decompose the gaseous formaldehyde under the visible-light irradiation (lambda > 400 mn), and its photocatalytic activity depended on N dopant concentration. NaTaO2.943N0.047 showed the highest photoactivity for the formaldehyde photodegradation. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：864 / 872

页数：9

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