Photocatalytic oxidation of NOx over visible-fight-responsive nitrogen-doped TiO2

被引：7

作者：

Zhou, Lin ^{[1
]}

Tan, Xin ^{[1
]}

Zhao, Lin ^{[1
]}

Sun, Ming ^{[1
]}

机构：

[1] Tianjin Univ, Sch Chem Engn & Technol, Sch Environm Sci & Technol, Tianjin 300072, Peoples R China

来源：

KOREAN JOURNAL OF CHEMICAL ENGINEERING | 2007年 / 24卷 / 06期

关键词：

photocatalysis; nitrogen doped Titania; visible-light induced; nitrogen oxides; environment;

D O I：

10.1007/s11814-007-0113-8

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In order to utilize visible-light in photocatalytic conversion of NOx, nitrogen atoms were doped in commercially available photocatalytic TiO2 powders by impregnating method. The crystal structures of TiO2 were not changed after calcination process. Analysis by X-ray photoelectron spectroscopy (XPS) indicated that N atoms were incorporated in the bulk phase of TiO2 as N-Ti-O linkages. A significant shift of the absorption edge to a lower energy and a higher absorption in the visible-light region were observed. These N-doped TiO2 powders exhibited photocatalytic activity of the oxidation of NOx under visible-light irradiation. The sample mixed with 20 wt% ammonium carbonate and calcined in 600 degrees C showed best photocatalytic activity and its activity can be restored by rinsing with water after long-term operation.

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收藏

页码：1017 / 1021

页数：5

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