Preparation and properties of a nano TiO2/Fe3O4 composite superparamagnetic photocatalyst
来源期刊：Rare Metals2009年第5期
论文作者：LI Yuxianga, ZHANG Meia, GUO Mina, and WANG Xidongb a School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing , China b College of Engineering, Peking University, Beijing , China
文章页码：423 - 427
摘 要：Nano TiO2/Fe3O4 composite particles with different molar ratios of TiO2 to Fe3O4 were prepared via sol-gel method. X-ray diffraction, transmission electron microscopy, and vibration sample magnetometry were used to characterize the TiO2/Fe3O4 particles. The photocatalytic activity of the particles was tested by degrading methyl blue solution under UV illumination （254 nm）. The results indicate that with the content of TiO2 increasing, the photocatalytic activity of the composite particles enhances, while the magnetism of the particles decreases. When the molar ratio of TiO2 to Fe3O4 is about 8, both the photocatalytic activity and magnetism of the TiO2/Fe3O4 particles are relatively high, and their photocatalytic activity remains well after repeated use.
LI Yuxianga, ZHANG Meia, GUO Mina, and WANG Xidongb a School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China b College of Engineering, Peking University, Beijing 100871, China
摘 要：Nano TiO2/Fe3O4 composite particles with different molar ratios of TiO2 to Fe3O4 were prepared via sol-gel method. X-ray diffraction, transmission electron microscopy, and vibration sample magnetometry were used to characterize the TiO2/Fe3O4 particles. The photocatalytic activity of the particles was tested by degrading methyl blue solution under UV illumination （254 nm）. The results indicate that with the content of TiO2 increasing, the photocatalytic activity of the composite particles enhances, while the magnetism of the particles decreases. When the molar ratio of TiO2 to Fe3O4 is about 8, both the photocatalytic activity and magnetism of the TiO2/Fe3O4 particles are relatively high, and their photocatalytic activity remains well after repeated use.
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