Rare Metals

, Volume 28, Issue 5, pp 423–427

Preparation and properties of a nano TiO2/Fe3O4 composite superparamagnetic photocatalyst

Article

DOI: 10.1007/s12598-009-0082-7

Cite this article as:
Li, Y., Zhang, M., Guo, M. et al. Rare Metals (2009) 28: 423. doi:10.1007/s12598-009-0082-7
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Abstract

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.

Keywords

photocatalysissuperparamagnetismsol-gel methodTiO2Fe3O4

Copyright information

© Journal Publishing Center of University of Science and Technology Beijing and Springer Berlin Heidelberg 2009

Authors and Affiliations

  1. 1.School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.College of EngineeringPeking UniversityBeijingChina