Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 181, Issue 9, Pages 2516-2522Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2008.06.019
Keywords
TiO2; hierarchical structures; nanorods; chlorine-doping; photocatalysis
Funding
- National Basic Research Program of China [2007CB613301]
- National Science Foundation of China [20503009, 20777026]
- New Century Excellent Talents in University [NCET-07-0352]
- Ministry of Education of China [108097]
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in this study, we report the synthesis of hierarchical chlorine-doped rutile TiO2 spherical clusters of nanorods photocatalyst on a large scale via a soft interface approach. This catalyst showed much higher photocatalytic activity than the famous commercial titania (Degussa P25) under visible light (lambda > 420 nm). The resulting sample was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), nitrogen adsorption, X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy, H-1 solid magic-angle spinning nuclear magnetic resonance (MAS-NMR) and photoluminescence spectroscopy. On the basis of characterization results, we found that the doping of chlorine resulted in red shift of absorption and higher surface acidity as well as crystal defects in the photocatalyst, which were the reasons for high photocatalytic activity of chlorine-doped TiO2 under visible light > 420 nm). These hierarchical chlorine-doped rutile TiO2 spherical clusters of nanorods are very attractive in the fields of environmental pollutants removal and solar cell because of their easy separation and high activity. (C) 2008 Elsevier Inc. All rights reserved.
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