Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (04): 607-611.doi: 10.1016/S1872-1508(08)60027-3

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Preparation and Characterization of Room-temperature Ferromagnetic Ni-doped TiO2 Nanobelts

ZHANG Hong-Ye; JI Tian-Hao; LI Ling-Long; QI Xing-Yi; LIU Yi-Fan; CAI Jian-Wang; DU Hai-Yan; SUN Jia-Yue   

  1. School of Materials Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, P. R. China; State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P. R. China; College of Chemical and Environmental Engineering, Beijing Technology and Business University, Beijing 100037, P. R. China
  • Received:2007-10-08 Revised:2007-12-10 Published:2008-04-07
  • Contact: JI Tian-Hao E-mail:tianji@buaa.edu.cn

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Abstract: Ni-doped anatase TiO2 nanobelts (NBs) with different Ni2+ contents were simply prepared by combining ion-exchange with hydrothermal treatment. They were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR), and magnetic measurement techniques. The results showed that Ni2+ cations doped into the TiO2 lattice and no metallic nickel clusters or nanoparticles could be found. The magnetic results demonstrated that the prepared Ni-doped TiO2 samples had complex magnetic mechanism including room-temperature ferromagnetic and paramagnetic behaviors, and with the increase of Ni2+ content, the magnetization also increased under the same applied field owing to uniform distribution of Ni2+ ions in TiO2 nanobelts.

Key words: Diluted magnetic semiconductor, Nanobelts, Ni-doped TiO2, Room-temperature ferromagnetic