Preparation of N-doped TiO2: characterization and photocatalytic performance under UV and visible light

被引：78

作者：

Bellardita, M. ^{[1
]}

Addamo, M. ^{[1
]}

Di Paola, A. ^{[1
]}

Palmisano, L. ^{[1
]}

Venezia, A. M. ^{[2
]}

机构：

[1] Univ Palermo, Schiavello Grillone Photocatalysis Grp, Dipartimento Ingn Chim Proc & Mat, I-90128 Palermo, Italy

[2] ISMN CNR, Consiglio Nazl Ric Palermo, I-90146 Palermo, Italy

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2009年 / 11卷 / 20期

关键词：

TITANIUM-DIOXIDE; PHOTOELECTROCHEMICAL PROPERTIES; BAND-GAP; DEGRADATION; RUTILE; PHENOL; IONS; PHOTODEGRADATION; TRANSFORMATION; 4-NITROPHENOL;

D O I：

10.1039/b816708g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nanocrystalline N-doped TiO2 samples were prepared by using TiCl4 or TiOSO4 as precursors. The powders were characterized by X-ray diffraction, BET specific surface area measurements, scanning electron microscopy, diffuse reflectance spectroscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. The photocatalytic activity was tested using the photodegradation of 4-nitrophenol under UV and visible light. Some samples were more active than commercial Degussa P25. A shift of the absorption edge to a lower energy and a stronger absorption in the visible light region were observed in the samples obtained from TiCl4. Two absorption edges were observed in the samples derived from TiOSO4 and calcined at 400 degrees C: the main edge due to TiO2 and the second one due to the presence of a localised midgap band that induces the visible light activity.

引用

页码：4084 / 4093

页数：10

共 67 条

[1] Preparation and photoactivity of nanostructured TiO2 particles obtained by hydrolysis of TiCl4 [J].