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Preparation and Photocatalytic Property of TiO2-Fe3O4 Core–Shell Nanoparticles

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Titanium dioxide is an attractive photocatalytic material with a wide band gap which can be applied in chemical processes to degrade organic compounds. When TiO2 nanoparticles are dispersed in water solution in suspended state they possess high photocatalytic activity, resulting in effectively degrading the hazardous compounds in wastewater. But when the TiO2 nanoparticles are used in suspension state, it is very difficult to get them back and make them reuse, which would limit their application due to the cost. Here, we report the preparation of reusable TiO2 composite nanoparticles with a core–shell structure, which consist of a nanosized Fe3O4 core and the encapsulated TiO2 shell. The experimental result shows that these nanoparticles can be used in suspended state and exhibit high photocatalytic activity. In addition, the photocatalytic nanoparticles with core–shell structure can be easily withdrawn with a magnetic field.
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Document Type: Research Article

Publication date: February 1, 2009

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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