We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Enhanced Photocatalytic Activity of Co Surface Doped Nanocrystalline TiO-SiO Composite Films.
- Authors
Zhao, Nan; Yao, Yao; Feng, Ji-jun; Yao, Ming-ming; Li, Fang
- Abstract
In order to enhance the photocatalytic activity of the TiO films, Co surface doped TiO-SiO composite films were synthesized by the improved sol-gel method, in which tetrabutyl titanate (Ti(OCH)) and tetraethyl orthosilicate were chosen as the precursors and cobaltous nitrate hexahydrate (Co(NO)·6HO) was chosen as cobalt source. The field emission scanning electron microscopy and X-ray diffraction results indicated that the films were composed of nanoparticles or aggregates. The photoluminescence results revealed that the recombination rate of the photogenerated electrons and holes was prohibited via SiO composite and Co doping in TiO film. The Brunauer-Emmett-Teller results showed that the surface area of the modified TiO was 301.7 m g, while that of the pure TiO was 68.4 m g. The photocatalytic activities of the films were evaluated by degradation of an organic dye in aqueous solution. With the SiO composite and Co doping, the modified TiO films with high photocatalytic activity and clearly responsive to the visible light were obtained. The mechanisms of photoactivity enhancement for composite films have also been discussed.
- Subjects
PHOTOCATALYSIS; CATALYTIC activity; NANOCRYSTALS; TITANIUM dioxide films; METALLIC composites; SILICON oxide; METALLIC surfaces; COBALT compounds
- Publication
Water, Air & Soil Pollution, 2012, Vol 223, Issue 9, p5855
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-012-1321-3