Visible-Light Photocatalytic Properties of Weak Magnetic BiFeO3 Nanoparticles


  • This work was supported by the National Key Projects for Basic Research of China (2002CB613303, 2006CB921802) and the National Natural Science Foundation of China (50332020, 50528203, 20373025, and 20528302).


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Polycrystalline BiFeO3nanoparticles (size 80–120 nm) are prepared by a simple sol–gel technique. Such nanoparticles are very efficient for photocatalytic decomposition of organic contaminants under irradiation from ultraviolet to visible frequencies. The BiFeO3 nanoparticles also demonstrate weak ferromagnetism of about 0.06 μB/Fe at room temperature, in good agreement with theoretical calculations.