Ultraviolet (UV) and visible light active photocatalysts, 13-20 nm in size, were prepared by doping iron into anatase TiO2 (Fe/Ti at. ratio: 0.11% and 0.49%). Greater Fe dosage led to stronger light absorbance in both UV and visible regions, and also to generally better photocatalytic activity. Fe2+ and Fe3+ coexisted in 0.11% Fe- TiO2, while only Fe3+ existed in 0.49% Fe-TiO2. A dramatic change in the molecular environment of Fe was observed after the doping process; from cubic (Fe3 O4) and trigonal (Fe2 O 3) structures into tetragonal TiO2. Different Fe speciation in catalysts led to different kinetics for methylene blue photocatalytic degradation.
|頁（從 - 到）||1385-1387|
|期刊||Journal of Vacuum Science and Technology B:Nanotechnology and Microelectronics|
|出版狀態||Published - 2009|
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